When MIGHT statins be helpful?

I spend a lot of my day bashing statin drugs and helping people get rid of them.

But are there instances in which statin drugs do indeed provide real advantage? If someone follows the diet I've articulated in these posts and in the Track Your Plaque program, supplements omega-3 fatty acids and vitamin D, normalizes thyroid measures, and identifies and corrects hidden genetic sources of cardiovascular risk (e.g., Lp(a)), then are there any people who obtain incremental benefit from use of a statin drug?

I believe there are some groups of people who do indeed do better with statin drugs. These include:

Apoprotein E4 homozygotes

Apoprotein E2 homozygotes

Familial combined hyperlipidemia (apoprotein B overproduction and/or defective degradation)

Cholesteryl ester transfer protein homozygotes (though occasionally manageable strictly with diet)

Familial heterozygous hypercholesterolemia, familial homozygous hypercholesterolemia

Other rare variants, e.g., apo B and C variants

The vast majority of people now taking statin drugs do NOT have the above genetic diagnoses. The majority either have increased LDL from the absurd "cut your fat, eat more healthy whole grains" diet that introduces grotesque distortions into metabolism (like skyrocketing apo B/VLDL and small LDL particles) or have misleading calculated LDL cholesterol values (since conventional LDL is calculated, not measured).

As time passes, we are witnessing more and more people slow, stop, or reverse coronary plaque using no statin drugs.

Like antibiotics and other drugs, there may be an appropriate time and situation in which they are helpful, but not for every sneeze, runny nose, or chill. Same with statin drugs: There may be an occasional person who, for genetically-determined reasons, is unable to, for example, clear postprandial (after-eating) lipoproteins from the bloodstream and thereby develops coronary atherosclerotic plaque and heart attack at age 40. But these people are the exception.

Advanced topics in nutrition

Nutrition in the modern world has become an increasingly problematic topic. From genetic modification to commercialized methods of mass production, we are having to navigate all manner of complex issues in food choices, particularly if ideal health, including maximal control over coronary plaque, is among our goals.

We will therefore be releasing a series of discussions on the Track Your Plaque website in the coming months, a series I call "Track Your Plaque Advanced Topics in Nutrition." These will be, as the series title suggests, discussions for anyone interested in more than the "eat a balanced diet" nonsense that issues from "official" sources. Among the topics to be covered:

1)Advanced Glycation End-products--both endogenous and exogenous, including peripheral issues like lipoxidation and acrylamides.

2)Dietary influences on LDL oxidation--including the concept of "glycoxidation." Protection from oxidative phenomena is not just about taking antioxidants.

3) Foods you MUST eat--We've talked a lot about foods that you shouldn't eat. How about foods you should eat?

The New Track Your Plaque Guide now available

The New Track Your Plaque Guide is now available!

The Track Your Plaque program has evolved over its 8 year history. While the original Track Your Plaque book reflected the program details that got the program started back in 2003-2004, plenty has changed.

This new version of the book, what I call the program Guide, represents version 2.0 of Track Your Plaque and includes:

--Updated lipoprotein treatment strategies--including new and expanded treatment choices for small LDL and lipoprotein(a).

--An entire chapter on vitamin D and its crucial role in cardiovascular health and plaque control.

--A new and expanded diet--All the reasons why the New Track Your Plaque Diet can achieve spectacular improvement in lipids/lipoproteins, reversal of insulin resistance/pre-diabetes/diabetes, weight loss, reduction in blood pressure, etc. are discussed in considerable detail. The diet is crafted to achieve maximum control over both metabolic responses and coronary plaque.

--An entire chapter on the role of omega-3 fatty acids is included.

--A detailed discussion on the role of iodine and thyroid health--One of the newest additions to the Track Your Plaque menu of strategies is to achieve and maintain ideal thyroid health. This tips the scales in your favor for improved control over lipids/lipoproteins, weight, blood sugar, and coronary plaque.


The new guide, as well as our new Member kits that include the new Track Your Plaque Recipe Book, At-Home Lab Test kits, and nutritional supplements, are all available in the Track Your Plaque Marketplace.

Don't wet yourself

While there is more to wheat's adverse effects on human health than celiac disease, studying celiac disease provides important insights into why and how wheat--the gluten component of wheat, in this case--is so destructive to human health.

Modern wheat, in particular, is capable of causing "celiac disease" without intestinal symptoms---no cramping or diarrhea--but instead shows itself as brain injury (ataxia, dementia), peripheral nervous system damage (peripheral neuropathy), joint and muscle inflammation (rheumatoid arthritis, polymyalgia rheumatica and others), and gastrointestinal cancers.

One neurological manifestation of wheat's effect on the human brain is a condition called cerebellar ataxia. This is a condition that can affect adults (average age 48 years) and children and consists of incoordination, falls, and incontinence.

Because brain tissue has limited capacity for healing and regeneration, symptoms of cerebellar ataxia usually improve slowly and modestly with meticulous elimination of wheat and other gluten sources.

Such observations are relevant even to people without celiac disease. Celiac disease sufferers are more susceptible to such extra-intestinal phenomena, but it can also happen in people without positive celiac antibodies.



Some references:

Neurological symptoms in patients with biopsy proven celiac disease

A total of 72 patients with biopsy proven celiac disease (CD) (mean age 51 +/- 15 years, mean disease duration 8 +/- 11 years) were recruited through advertisements. All participants adhered to a gluten-free diet. Patients were interviewed following a standard questionnaire and examined clinically for neurological symptoms. Medical history revealed neurological disorders such as migraine (28%), carpal tunnel syndrome (20%), vestibular dysfunction (8%), seizures (6%), and myelitis (3%). Interestingly, 35% of patients with CD reported of a history of psychiatric disease including depression, personality changes, or even psychosis. Physical examination yielded stance and gait problems in about one third of patients that could be attributed to afferent ataxia in 26%, vestibular dysfunction in 6%, and cerebellar ataxia in 6%. Other motor features such as basal ganglia symptoms, pyramidal tract signs, tics, and myoclonus were infrequent. 35% of patients with CD showed deep sensory loss and reduced ankle reflexes in 14%. Gait disturbances in CD do not only result from cerebellar ataxia but also from proprioceptive or vestibular impairment.



Gluten ataxia in perspective: epidemiology, genetic susceptibility and clinical characteristics

Two hundred and twenty-four patients with various causes of ataxia from North Trent (59 familial and/or positive testing for spinocerebellar ataxias 1, 2, 3, 6 and 7, and Friedreich's ataxia, 132 sporadic idiopathic and 33 clinically probable cerebellar variant of multiple system atrophy MSA-C) and 44 patients with sporadic idiopathic ataxia from The Institute of Neurology, London, were screened for the presence of antigliadin antibodies. A total of 1200 volunteers were screened as normal controls. The prevalence of antigliadin antibodies in the familial group was eight out of 59 (14%), 54 out of 132 (41%) in the sporadic idiopathic group, five out of 33 (15%) in the MSA-C group and 149 out of 1200 (12%) in the normal controls. The prevalence in the sporadic idiopathic group from London was 14 out of 44 (32%). The difference in prevalence between the idiopathic sporadic groups and the other groups was highly significant (P < 0.0001 and P < 0.003, respectively). The clinical characteristics of 68 patients with gluten ataxia were as follows: the mean age at onset of the ataxia was 48 years (range 14-81 years) with a mean duration of the ataxia of 9.7 years (range 1-40 years). Ocular signs were observed in 84% and dysarthria in 66%. Upper limb ataxia was evident in 75%, lower limb ataxia in 90% and gait ataxia in 100% of patients. Gastrointestinal symptoms were present in only 13%. MRI revealed atrophy of the cerebellum in 79% and white matter hyperintensities in 19%. Forty-five percent of patients had neurophysiological evidence of a sensorimotor axonal neuropathy. Gluten-sensitive enteropathy was found in 24%. HLA DQ2 was present in 72% of patients. Gluten ataxia is therefore the single most common cause of sporadic idiopathic ataxia.

Wheat brain

Among the most common effects of wheat are those on the brain.

Consume wheat and susceptible individuals will experience a subtle euphoria. Others experience mental cloudiness or sleepiness. (This is what I personally get.)

It gets worse. Children with ADHD and autism have difficulty concentrating on a task and have behavioral outbursts after a cookie. Schizophrenics experience paranoid delusions, auditory hallucinations, and worsening of social detachment. People with bipolar disorder can have the manic phase triggered by a breadcrumb. All these effects are blocked by administering drugs that block the brain's opiate receptors. (This is why, by the way, a drug company is planning to release an oral agent, naltrexone, formerly administered to heroin addicts to help control addiction, for weight loss: block the euphoric effect, take away the temptation, lose weight.)

Here is Heart Scan Blog reader, Nicole's, mental fog story:

I have been grain-free (no gluten free grains either) for quite a long time (about a year and a half). Earlier this week, I decided to try white bread and pasta. The experiment only lasted two days. I had horrible terminal insomnia both nights, causing me on the second night to wake up at 2:30 am unable to get back to sleep at all. I felt drugged and in a mind-fog all the next day and even dozed off a few times! Luckily I had the day off work.

I had very bad forgetfulness also. I forgot that I left my bag and groceries at work, so I had to go back for them. Then I had to use my husband's keys to get in because I thought my keys were in my bag, but it turns out they were in my pocket. Then I got my bag, set the alarm, locked the door and then realized I forgot my groceries. So I had to re-open the door, unset the alarm, and go back for the groceries. Then I locked the door, forgetting to set the alarm, so I had to unlock it, open up and set the alarm. It was just ridiculous, I am NEVER like that!

In addition to the insomnia and forgetfulness, I also had horrible anxiety and paranoia, almost to the point of panic. Which I NEVER have, I am usually very easy-going, even-tempered, and worry-free. But this was horrible, I really was quite paranoid and anxious about everything. Weird!

And the worst, was that in just two days of eating wheat, I gained 4 lbs and 2% bodyfat!! It's two days wheat-free now, and it's finally going back down, but wow. Just two days of wheat-eating caused that much weight and fat gain!

Anyway, I've learned my lesson and will continue to avoid grains (including gluten free grains) entirely.


Eat more "healthy whole grains"? Modern dwarf Triticum aestivum, perverted even further by agricultural geneticists and modern agribusiness, subsidized by the U.S. government to permit $5 pizza, is better than any terrorist plot to discombobulate the health and performance of the American people.

The Westman Diet

Dr. Eric Westman has been a vocal proponent of carbohydrate restriction to gain control over diabetes, as have Drs. Richard Bernstein, Mary Vernon, Richard Feinman, and Jeff Volek.

Several studies over the years have demonstrated that reductions in carbohydrate content of the diet yield reductions in weight and HbA1c (glycated hemoglobin, a reflection of average blood glucose over the preceding 60-90 days).

Among the more important recent clinical studies is a small experience from Duke University's Dr. Eric Westman. In this study, obese type 2 diabetics reduced carbohydrate intake to 20 grams per day or less: no wheat, oats, cornstarch, or sugars. Participants ate nuts, cheese, meats, eggs, and non-starchy vegetables.

After 6 months, average weight loss was 24.4 lbs, BMI was reduced from 37.8 to 34.4. At the end of the study, 95% of participants on this severe carbohydrate restriction reduced or eliminated their diabetes medications.

That was only after 6 months. Note that the ending BMI was still quite well into the obese range. Imagine what another 6-12 months would do, or achieving BMI somewhere closer to ideal.

Curiously, this idea of severe low-carbohydrate restriction to cure or minimize diabetes is not new. Sir William Osler, one of the founders of Johns Hopkins Hospital and author of the longstanding authoritative text, Principles and Practice of Medicine, advocated an diet identical to Dr. Westman's diet. So did Dr. Frederick Banting, discoverer of the pancreatic extract, insulin, to treat childhood diabetics. Before insulin, Banting and his colleagues at the University of Toronto used carbohydrate elimination (less than 10 g per day) to prolong the lives of children with diabetes.

This lesson was also learned many times during war time, when staples like bread were unavailable. The Siege of Paris in 1870 yielded cures for diabetes in many (or at least they stopped passing urine that tasted--yes, tasted--sweet and attracted flies), only to have it recur after the siege was over.

These are lessons we will have to relearn. As long as the American Diabetes Association and most physicians continue to advocate a diet of reduced fat, increased carbohydrate that includes plenty of "healthy whole grains," diabetics will continue to be diabetics, taking their insulin and multiple medications while developing neuropathy (nervous system degeneration), nephropathy (kidney disease and failure), atherosclerosis and heart attack, cataracts, and die 8 to 10 years earlier than non-diabetics.

All the while, we've had the combined wisdom from antiquity onwards: Carbohydrates cause diabetes; elimination of carbohydrates cures diabetes.

(This applies, of course, only to adult overweight type 2 diabetics, not type 1 or some of the other variants.)

Handy dandy carb index

There are a number of ways to gauge your dietary carbohydrate exposure and its physiologic consequences.

One of my favorite ways is to do fingerstick blood sugars for a one-hour postprandial glucose. I like this because it provides real-time feedback on the glucose consequences of your last meal. This can pinpoint problem areas in your diet.

Another way is to measure small LDL particles. Because small LDL particles are created through a cascade that begins with carbohydrate consumption, measuring them provides an index of both carbohydrate exposure and sensitivity. Drawback: Getting access to the test.

For many people, the most practical and widely available gauge of carbohydrate intake and sensitivity is your hemoglobin A1c, or HbA1c.

HbA1c reflects the previous 60 to 90 days blood sugar fluctuations, since hemoglobin is irreversibly glycated by blood glucose. (Glycation is also the phenomenon responsible for formation of cataracts from glycation of lens proteins, kidney disease, arthritis from glycation of cartilage proteins, atherosclerosis from LDL glycation and components of the arterial wall, and many other conditions.)

HbA1c of a primitive hunter-gatherer foraging for leaves, roots, berries, and hunting for elk, ibex, wild boar, reptiles, and fish: 4.5% or less.

HbA1c of an average American: 5.2% (In the population I see, however, it is typically 5.6%, with many 6.0% and higher.)

HbA1c of diabetics: 6.5% or greater.

Don't be falsely reassured by not having a HbA1c that meets "official" criteria for diabetes. A HbA1c of 5.8%, for example, means that many of the complications suffered by diabetics--kidney disease, heightened risk for atherosclerosis, osteoarthritis, cataracts--are experienced at nearly the same rate as diabetics.

With our wheat-free, cornstarch-free, sugar-free diet, we have been aiming to reduce HbA1c to 4.8% or less, much as if you spent your days tracking wild boar.

Battery acid and oatmeal

Ever notice the warnings on your car's battery? "Danger: Sulfuric acid. Protective eyewear advised. Serious injury possible."

Sulfuric acid is among the most powerful and potentially harmful acids known. Get even a dilute quantity in your eyes and you will suffer serious burns and possibly loss of eyesight. Ingest it and you can sustain fatal injury to the mouth and esophagus. Sulfuric acid's potent tendency to react with other compounds is one of the reasons that it is used in industrial processes like petroleum refining. Sulfuric acid is also a component of the harsh atmosphere of Venus.

Know what food is the most potent source of sulfuric acid in the body? Oats.

Yes: Oatmeal, oat bran, and foods made from oats (you know what breakfast cereal I'm talking about) are the most potent sources of sulfuric acid in the human diet.

Why is this important? In the transition made by humans from net-alkaline hunter-gatherer diet to net-acid modern overloaded-with-grains diet, oats tip the scales heavily towards a drop in pH, i.e., more acidic.

The more acidic your diet, the more likely it is you develop osteoporosis and other bone diseases, oxalate kidney stones, and possibly other diseases.

Here's one reference for this effect.

What'll it be: Olive oil or bread?

We frequently discuss the advisability of consuming fats, carbohydrates, and various types within each category.

But what's the worst of all? Combining fats with carbohydrates.

Putting aside the wheat-is-worst form of carbohydrate issue and treating bread as a prototypical carbohydrate, let's play out a typical scenario, a make-believe feeding study in which a theoretical person is fed specific foods.

John is our test person, a 40-year old, 5 ft 10 inch, 210 lb, BMI 27.7 (roughly the mean for the U.S.) He starts with an average American diet of approximately 55% carbohydrates and 30% fat. Starting lipoproteins (NMR):

LDL particle number 1800 nmol/L
Small LDL 923 nmol/L


(The LDL particle number of 1800 nmol/L translates to measured LDL cholesterol of 180 mg/dl, i.e., drop last digit or divide by 10.)

Also, calculated LDL cholesterol is 167 mg/dl (yes, underestimating "true" measured LDL), HDL 42 mg/dl, triglycerides 170 mg/dl.

We feed him a diet increased in carbohydrates and reduced in fat, especially saturated fat, with more breakfast cereals, breads and other wheat products, pasta, fruit juices and fruit, and potatoes. After four weeks:

LDL particle number 2200 nmol/L
Small LDL 1378 nmol/L

Note that LDL particle number has increased by 400 nmol/L due entirely to the increase in small LDL particles triggered by carbohydrate consumption. Lipids show calculated LDL cholesterol 159 mg/dl--yes, a decrease, HDL 40 mg/dl, triglycerides 189 mg/dl. (At this point, if John's primary care doctor saw these numbers, he would congratulate John on reducing his LDL cholesterol and/or suggest a fibrate drug to reduce triglycerides.)

John takes a rest for four weeks during which his lipoproteins revert back to their starting values. We then repeat the process, this time replacing most carbohydrate calories with fats, weighed heavily in favor of saturated fats like fatty red meats, butter and other full-fat dairy products. After four weeks:

LDL particle number 2400 nmol/L


Let's

Chocolate peanut butter cup smoothie

Here's a simple recipe for chocolate peanut butter cup smoothie.

The coconut milk, nut butter, and flaxseed make this smoothie exceptionally filling. If you are a fan of cocoa flavonoids for reducing blood pressure, then this provides a wallop. Approximately 10% of cocoa by weight consists of the various cocoa flavonoids, like procyanidins (polymers of catechin and epicatechin) and quercetin, the components like responsible for many of the health benefits of cocoa.


Ingredients:
1/2 cup coconut milk
1 cup unsweetened almond milk
2 tablespoons cocoa powder (without alkali)
2 tablespoons shredded coconut (unsweetened)
1 tablespoon ground flaxseed
1 teaspoon almond extract
1 1/2 tablespoons natural peanut, almond, or sunflower seed butter
Non-nutritive sweetener to taste (stevia, Truvia, sucralose, xylitol, erythritol)
4 ice cubes

Combine ingredients in blender. Blend and serve.

If you plan to set any of the smoothie aside, then leave out the flaxseed, as it absorbs water and will expand and solidify if left to stand.

For an easy variation, try adding vanilla extract or 1/4 cup of sugar-free (sucralose) vanilla or coconut syrup from Torani or DaVinci and leave out the added sweetener.

The compromise I draw here is the use of non-nutritive sweeteners. Beware that they can increase appetite, since they likely trigger insulin release. However, this smoothie is so filling that I don't believe you will experience this effect with this recipe.
Is an increase in heart scan score GOOD?

Is an increase in heart scan score GOOD?

In response to an earlier Heart Scan Blog post, I don't care about hard plaque!, reader Dave responded:

Hello Dr Davis,

Interesting post about hard and soft plaque. I recently had a discussion with my GP regarding my serious increase in scan score (Jan 2006 = 235, Nov 2007 = 419).

After the first scan we started aggressively going after my LDL, HDL and Trig...196,59,221

And have them down to 103, 65, 92 - we still have a way to go to 60/60/60 [The Track Your Plaque target values]-

So the increase is a surprise, but my doctor said that the increase could in part be cause some of the soft plaque had been converted to hard plaque and the scan would show that conversion.



Dave's doctor then responded to him with this comment:

"Remember that although your coronary calcium score has gone up, this does not mean that you are at greater risk than you were a year ago. Remember that the most dangerous plaque is the not-yet calcified soft plaque, which will not show up on an EBT [i.e., calcium score]. It is only the safe, calcified plaque that can be measured with the EBT. [Emphasis mine.] For your score to go up like it did, while your lipids came down so much, what had to happen was that lots of dangerous unstable plaque was converted to stable, calcified plaque. There are no accepted guidelines for interpreting changes in calcium scores over time, because the scores tend to go up as treatment converts dangerous plaque to safer plaque. We do know that aggressively lowering LDL reduces both unstable and stable plaque, and we know that risk can be further lowered by adjuvant therapy such as I listed above."


Huh?

This bit of conventional "wisdom" is something I've heard repeated many times. Is it true?

It is absolutely NOT true. In fact, the opposite is true: Dave's substantial increase in heart scan score from 235 to 419 over 22 months, representing a 78% increase, or an annualized rate of increase of 37%. This suggests a large increase in his risk for heart attack, not a decrease. Big difference!

Dr. Paulo Raggi's 2004 study, Progression of coronary artery calcium and risk of first myocardial infarction in patients receiving cholesterol-lowering therapy in 495 participants addresses this question especially well. Two heart scans were performed three years apart, with a statin drug initiated after the first scan, regardless of score.

During the period of study, heart attacks occurred in 41 participants. When these participants were analyzed, it was found that the average annual increase in score over the three year period was 42%. The average annual rate of increase in those free of heart attack was 17%. The group with the 42% annual rate of increase--all on statin drugs--the risk of heart attack was 17.2-fold greater, or 1720%.

The report made several other important observations:

--20% of the heart attack-free participants showed reduction of heart scan scores, i.e., reversal. None of the participants experiencing heart attack had a score reduction.
--Only 2 of the 41 heart attacks occurred in participants with <15% per year annual growth, while the rest (39) showed larger increases.
--The intensity of LDL reduction made no difference in whether heart attacks occurred or not. Those with LDL<100 mg/dl fared no better than those with LDL>100 mg/dl.

Dr. Raggi et al concluded:

"The risk of hard events [heart attack] was significantly higher in the presence of CVS [calcium volume score] progression despite low LDL serum levels, although the interaction of CVS change and LDL level on treatment was highly significant. The latter observation strongly suggests that a combination of serum markers and vascular markers [emphasis mine] may constitute a better way to gauge therapeutic effectiveness than isolated measurement of lipid levels."

This study demonstrates an important principle: Rising heart scan scores signal potential danger, regardless of LDL cholesterol treatment. Yes, LDL reduction does achieve a modest reduction in heart attack, but it does not eliminate them--not even close.

These are among the reasons that, in the Track Your Plaque program, we aim to correct more than LDL cholesterol. We aim to correct ALL causes of coronary plaque, factors that can be responsible for continuing increase in heart scan score despite favorable LDL cholesterol values.

So, Dave, please forgive your doctor his misunderstanding of the increase in your heart scan score. He is not alone in his ignorance of the data and parroting of the mainstream mis-information popular among the statin-is-the-answer-to-everything set.

Just don't let your doctor's ignorance permit the heart attack that is clearly in the stars. Take preventive action now.

Comments (30) -

  • Anonymous

    11/20/2007 5:41:00 PM |

    Dr Davis,

    What should Dave do?  He appears to have improved his LDL:HDL ratio as well as his total C to HDL ratio substantially, but his CAC score jumped significantly.  Maybe look at other risk factors?

    The info here gives no indication of median blood pressure for Dave.  LP(a)?  No indication of particle sizes. But, which of these or others would be most likely to be Dave's downfall in attempting to mitigate a future hard endpoint?

    I don't ask this lightly, I myself am trying to follow the TYP program and keep my high-for-my-age 29 CAC score from growning.  But, I'm frankly not looking forward to my rescan in about a year.  I'm a bit worried about the, "What if my scan shows a dramatic increase?  What then?"

    Thank you for the valuable information you provide.

    :LaughingCT

  • Dr. Davis

    11/20/2007 11:17:00 PM |

    I would urge Dave to follow all the principles of the Track Your Plaque program, including:

    1) Fish oil to provide minimum 1200 mg EPA + DHA per day

    2) Correction of all concealed lipoprotein patterns such as IDL and Lp(a)

    3) Vitamin D raised to 50 ng/ml--crucial!

    4) Normalization of blood pressure, including during exericse.

    5) Normal blood sugar (<100 mg/dl).

    Further efforts might be required, depending on the long-term effects on rate of plaque growth.

  • Ross

    11/21/2007 3:41:00 AM |

    My question is: how repeatable do you think the scores are on the CT scan?  Are they bulletproof (+/- 5% no matter where measured), consistent by analyst (+/- 5% with the same doctor analyzing the scan), or...?  

    I am currently visiting my brother in law, who is an FP doctor with a private practice.  One of his professional friends, a cardiologist who seems a cut above (thinks stenting is a cop-out), recently told him that he only trusted two centers in the mid-Ohio region to score a 16-slice CT scan accurately, and that even then, the variability was still too high for his taste.  Two numbers within 20% were within his expected error bars and weren't different enough to indicate any change to him.  Two different scan centers?  He wouldn't even compare the two scan scores.

    In my own job (software), I've had to manage human-measured numbers over and over again.  One observation keeps coming up: a single value doesn't mean much without an understanding of the accuracy of that value.  I really am curious about how you estimate confidence intervals on CT scan scores.

  • Dr. Davis

    11/21/2007 3:55:00 AM |

    Hi, Ross--

    Excellent questions.

    Several thoughts:

    1) 16-slice scanners are, unfortunately, prone to wider error in heart scan scoring, perhaps as much as 20%. The variation in scoring on an EBT or 64-slice device is far less.

    2) Variation from scan to scan, when expressed as percent, depends to a great degree on the score itself. Lumping all scores together, variation should be no more than 8-9%. However,a low score of, say 2, then repeated at 4 means 100% variation. However, the same absolute difference of 2 but with a score of 1002 and repeated at 1004 is <1% variation. Therefore, higher scores assume much less percent variation, usually <5%.

    3) Variation among different reading physicians tends to be a minor issue, since much of the scoring is done by standard criteria determined by software, not the human eye. The only real source of human variation comes from disputable areas, such as the mitral valve (which can sometimes encroach into the coronary area and appear like plaque) and the mouth of arteries, which can be debated as being in the aorta or in the coronary arteries themselves. However, these disputable areas are issues in <5% of scans.

  • Tom

    11/21/2007 4:30:00 AM |

    It's interesting that a 29 year old is able to track his plaque. I'm in my 60's now and recently found your site AFTER bypass surgery and a calcium score >700 via a 64 slice scan.
    In reading past comments, those of us having had the heart procedure are now unable to follow our progress via the cac score. Until this post I had hoped to use your recommended blood tests for indication of progress, but if LDL reduction achieves a modest risk reduction, we are left without a specific guide.
    Question: Was the progress in blood tests in dave's case a result of statins ?

  • Dr. Davis

    11/21/2007 12:46:00 PM |

    That's why lipoproteins are so important--they provide other indicators. In my experience, people who have LDL cholesterol as the sole cause of heart disease are a very small minority. The vast majority of people have multiple causes beyond LDL.

    Also, about 50% of people can still get a heart scan score after bypass surgery if you find a center willing to do a detailed analysis. You will need to ask.

    Also, I don't know what Dave did, since he is a reader and everything he posted is above. Are you there, Dave?

  • Dr. Davis

    11/21/2007 5:41:00 PM |

    Hi, Paul--

    I think your doctor might be confusing heart scans with CT coronary angiograms. She is right in saying that CT angiograms (using X-ray dye) require a lot of radiation; 100 chest x-rays worth with present technology.

    However, a plain heart scan to generate a heart scan score requires 4 chest x-rays worth on an EBT device, 8-10 on an 64-slice multi-detector device.

    See the Track Your Plaque Special Report, Radiation and Heart Scans: The Real Story at http://trackyourplaque.com/library/fl_06-021radiation.asp.

  • Anonymous

    11/21/2007 6:01:00 PM |

    Regarding repeatability, there is a 2005 study by Serukov, Bland, and Kondos that shows that the repeatability is a function of the square root of the calcium score, and that volume score is more repeatable than Agatston score. The reference is

    “Serial Electron Beam CT Measurements of Coronary Artery Calcium: Has Your Patient's Calcium Score Actually Changed?” Alexander B. Sevrukov, J. Martin Bland and George T. Kondos, American Journal of Roentgenology 2005; 185:1546-1553
    http://www.ajronline.org/cgi/content/full/185/6/1546

    In this report, the standard deviation of the difference between two sequential calcium scored is

    SDAG130 = 2.515 *sqrt(avg score)
    SDVol130 = 1.758 *sqrt(avg score)

    This results in the following values, where SDA is the standard deviation for the Agatston score and SDV is the standard deviation for the volume score.

    Score-SDA--%SDA--SDV--%SDV
    5-----5.62---112%---3.93--79%
    10----7.95---79%----5.55--56%
    20----11.2---56%----7.86--39%
    50----17.7---35%----12.4--25%
    100---25.1---25%----17.5--18%
    200---35.5---17%----24.8--12%
    300---43.5---14%----30.4--10%
    400---50.3---12%----35.1---9%
    500---56.2---11%----39.3---8%
    600---61.6---10%----43.0---7%
    700---66.5----9%----46.5---7%
    1000--79.5----7%----55.5---6%

    These values show why many people use 15% as a breakpoint - only if the score has changed by more than 15% can it be said that the change is real. And this is only true for scores above 200 or so.

    Harry

  • Anonymous

    11/21/2007 7:17:00 PM |

    My cardiologist told me that EBT scanning is not recommended for anyone under the age of 30. Is this true? If so, how do I (29 years) reliably know that I am at risk?

    I discovered your blog recently. Since I have a very bad family history of diabetes, high blood pressure, and cholesterol, I decided to visit a cardiologist last month so that I can request for an EBT scan. He said that I'm too young for that, and has instead asked me to take a Carotid IMT and Stress test - are these tests reliable enough to provide insight on my risk? Could these tests return "false positive" values?

    I had found during a blood test I did this July only to find that my triglycerides were at 600!! The other cholesterol values were bad too - totalC-HDL-LDL-Tri (255-31-Not measurable-600)

    Since then I have found your blog, lost around 25 lbs and did a VAP recently (I asked for NMR and all I got from doctors - what? What the heck is that?) So I settled for a VAP, since they knew about it.

    I did a VAP along with a comprehensive blood test and the measures that came up high were.

    LIPID related:
    Total LDL-C Direct:130 (Normal<130)
    Real LDL-C:110 (N<100)
    Sum Total LDL-C: 130 (<130)
    Remnant LIPO (IDL+VLDL3): 30 (<30)
    HDL-2:9 (>10)
    VLDL3: 14 (<10)

    Non-LIPID related high values:
    Uric Acid: 8.3  (4.0-8.0)
    Fasting Glucose: 104 (65-99)
    Creatine Kinase Total: 631 (<=200)


    LP PLA2 is normal: 164 (115-245)
    HBA1C suggests prediabetic: 5.7 (Normal <6%)


    Due to my very high value of CK Total, I researched online and found that this can increase due to high exercise, and I had it repeated after taking rest, and it returned normal results. My doctor was really surprised about this and initially hesitant to fractionise my CK. I feel empowered that I am able to take charge of my health and preventative care with the
    information that is available online (of course, one needs to tread that carefully and make an informed decision due to various conflicting opinions out there).

    Sorry for the long post, Doc. I have a newfound awareness of my health thanks to your blog, and am very much interested in knowing your inputs. I just hope that more physicians in our country follow your noble path and understand the true value and empowerment of preventive care.

    - Philip

  • Dr. Davis

    11/21/2007 8:09:00 PM |

    Hi, Philip--

    In general, 29 is very young, perhaps too young, unless there is an outstanding family history (e.g., father with heart attack at age 37). Although your lipid/lipoproteins are concerning, it would be highly unusual to have anything but a zero heart scan score at your age.

  • Dr. Davis

    11/21/2007 8:14:00 PM |

    Hi, Harry--
    Thanks for the help!

  • Neelesh

    11/22/2007 4:51:00 AM |

    Hi Dr. Davis,
      I've just bought the Track Your Plaque book, waiting for its arrival. I've had a heart attack a year back.I'm 30 years old with no family history, non-alcoholic, non-smoker and vegetarian.
    The event was attributed to ectatic arteries(Type-III) and a very high level of LP(a)- between 120-130. The standard lipid profile was also marginally higher. If I had not insisted for an LP(a) test after reading Dr Agatston's South Beach Heart Program, I would have never found the LP(a) factor.
       I was stented during the hospitalization and now I'm wondering how effective the heart scan will be, given that the accuracy reduces  with stented arteries (http://circ.ahajournals.org/cgi/content/meeting_abstract/114/18_MeetingAbstracts/II_692-a)

    Thanks!
    -Neelesh

  • Dr. Davis

    11/22/2007 2:35:00 PM |

    Hi, Neeleesh--

    I do advocate heart scanning in people with stents, but I generally suggest that only the unstented arteries be scored. It's imperfect, excluding the most diseased artery, but it's proven a useful compromise, leaving you with two "scorable" arteries.

    The study you cite, however, is not about heart scans, it's about CT coronary angiography, a study that yields "percent blockage" sort of information, not an index of plaque.

    Beyond Lp(a), you should strongly consider vitamin D normalization.  By your first name, I take it you are from India/Pakistan or similar background, an ethnic origin that is associated with severe vitamin D deficiency.

  • Neelesh

    11/22/2007 3:00:00 PM |

    Thanks Dr. Davis. And yes, I'm from India.

  • wccaguy

    11/22/2007 3:13:00 PM |

    Dr. Davis,

    I found your answer to Neeleesh to be interesting in the extreme.  I have a  follow up question to it.

    I don't have specific references for the two facts I have heard but couldn't reconcile:

    1   India has high coronary artery disease incidence.

    2   Your answer to Neeleesh states that vitamin d levels are low in India and Pakistan.  And that would help much to explain the high rate of coronary artery disease in these countries.

    3   And yet India is close to the equator and so vitamin d levels should be relatively high because of sun exposure right?

    The question then is this:  What is the cause of the low vitamin d level in those countries?

    Thanks!

  • Dr. Davis

    11/22/2007 4:00:00 PM |

    It is interesting, isn't it?

    I believe part of the explanation is that, the darker your skin complexion, the more you are "protected" from intense and prolonged sun exposure. But, activation of 7-hydrocholesterol to 25-OH-vitamin D3 may require many hours more exposure. Thus, a fair skinned person might activate D within minutes, while a dark skinned individual might require hours.

    Another factor that has not been thoroughly explored but has potential for yielding enormous insights: Vit D receptor genotypes. That is, vitamin D deficiency may express itself in different ways in different populations. Some might get colon cancer, others multiple sclerosis, others coronary disease.

    I believe that the dark-skinned phenomenon becomes especially an issue when migrating to sun-deprived climates such as the northern U.S.

  • wccaguy

    11/22/2007 6:12:00 PM |

    Hi Doc,

    Your explanation makes sense.

    I did a quick google search and found experts on the problem in India attributing it to the increasing extent to which Indians were staying indoors and not "being active."

    But the vitamin D issue throws the whole question of "activity" into question doesn't it?  It might not be the activity per se but instead the amount of sunlight reduction.

    And if, per your explanation, darker skinned people need more time in the sun than lighter skinned people for Vitamin D3 to be "activated" then than a decrease in sunlight would have more effect on darker skinned people than lighter skinned people.

    Very interesting...  And perhaps INCREDIBLY good news!!!

    Because it means that there might be a cheap effective treatment for the coronary disease epidemic in India.

    Does all that make sense?

  • wccaguy

    11/22/2007 6:19:00 PM |

    Just to follow up one more point on this D3 question...

    I guess what we need to do is find a study which shows a correlation between degree of skin pigmentation and Vitamin D3 activation?

    (I'm not sure if the word "degree" is the right word, but perhaps the question is understood anyway?)

    Answering that question would certainly set up the basis for a scientific study right?

  • Dr. Davis

    11/23/2007 12:56:00 AM |

    Yes, it does. It could serve as the basis for a tremendously interesting study.

  • Dr. Davis

    11/23/2007 1:09:00 AM |

    There are indeed a few studies that document this effect, e.g., Factors that influence the cutaneous synthesis and dietary sources of vitamin D (abstract viewable at Arch Biochem Biophys. 2007 Apr 15;460(2):213-7.)

    However, I am not aware of any study that examines the effect of vitamin D supplementation specifically in this population that tracks coronary atherosclerosis. One British study  in Bangladeshi adults did demonstrate dramatic reduction in inflammatory markers with vit D replacement (Circulating MMP9, vitamin D and variation in the TIMP-1 response with VDR genotype: mechanisms for inflammatory damage in chronic disorders? at http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=ShowDetailView&TermToSearch=12454321&ordinalpos=22&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum  ).

  • Dave K

    11/24/2007 12:21:00 AM |

    Hi Dr Davis,

    Sorry - I have been offline for a couple of days.  Interesting discussion.  I will try and add some detail lipid info.

    July 2007 Blood work showed

    My Lp(a) is 7
    IDL = 10
    VLDL=11
    HDL-2 = 15
    HDL-3 = 50
    VLDL C = 18
    VLDL1+2 = 7

    Currently taking fishoil 1700 mg of DHA+EHA
    Vitamin D 800mg - just incresed to 2000
    Baby Aspirin
    Multivitamin
    Crestor
    Just started Zetia after getting this last scan result
    Eat basic South Beach phase 3
    BMI - 27
    Glucose is 105
    Exercise 4X week...
    Lp-PLA2=120

    Blood pressure high-normal but I don't know about during exercise.  Cardilogist scheduled me for a stress test after this volume increase.

    I have not has a blood test for Vit D.

    Also - I had an angiograham after the first scan because I was having chests pains .... it turned up that I had no blockages whatsoever.  So we judged the chest pains as non cardiac.

    So I am following your list pretty close.  I guess I just have to wait to see how these changes do.  How long would you wait for another scan?

    Not sure what else to add - your website says to consider L-arginie...


    I do have a specific question.  In the scan report it shows where the calcium was found.  Don't know the software, but there was one spot where it showed in the early report that it didn't show in this report (of course there was several new areas) - could that have actually been a reversal at that spot?

  • Dr. Davis

    11/24/2007 1:25:00 AM |

    Small LDL and a deficiency of large HDL, along with modest excess weight, high blood sugar, high blood pressure all suggest you are (or were) likely over-dependent on processed carbohydrates like wheat products. Your pattern would likely respond vigorously to reduction or elimination of these foods and weight loss. Niacin can help this pattern. In our experience, normalization of vitamin D is crucial.

  • Dave K

    11/26/2007 5:51:00 AM |

    Dr Davis,

    Few more data ....

    Some of the treatments have only been for the last 6 months or so.  The Statin was first (of course) and it took almost a year to get something I could tolerate.  The we talked about Vit D (700) and fish oil (800 Omega 3).  After a full Lipid scan around 9 months ago - we decided to add more fish oil.  So the full dosage I listed is only 6 months old or so.

    Also - I love my red wine and I know the number says two glasses and i rarely do two - so its three or four ... which might be my next step....

    From your last response, I assume the VLDL and IDL levels are the ones you would target hardest at this point.

    Don't do a lot of sugar or wheat... Do eat Oatmeal everyday with rasins or blueberries.

    Oh and my other question was with this kind of increase how long would you wait for the next scan?

  • Dr. Davis

    11/26/2007 12:08:00 PM |

    Dave-

    I generally recommend waiting a year after all identifiable causes have been corrected. However, given your minimal doses of vit D, I usually have my patients wait at least six month after vitamin D blood levels are corrected.

  • Dave

    11/26/2007 8:01:00 PM |

    Dr Davis,

    Thank you ... keep up the great work and I'll keep reading... and tracking.

    Dave

  • G

    11/27/2007 12:39:00 AM |

    Neeleesh and DR. D,

    This Canadian physician appears to have a lot of indepth awareness of the diff phenotypes. He suggests (in the author's response) that D2 may not work as well in East Indians (may worsen glycemic control) versus D3 (the more biologically active vitamin D). Very fascinating!!

    http://www.cfp.ca/cgi/reprint/53/9/1435
    Repletion of vitamin D with vitamin D2 is common
    practice, and vitamin D2 can be used safely when monitored
    to achieve normal levels of 25(OH)D. This might
    take 2 to 3 months, as discussed in your letter and in my
    paper, because the half-life is about 2 weeks. Using vitamin
    D3 (1000 to 5000 IU) daily, depending on the level
    of deficiency, will also achieve this goal. I also agree
    that the goal is to achieve levels of 25(OH)D higher than
    100 nmol/L, preferably 100 to 125 nmol/L.
    My concern regarding vitamin D2 is that it is a synthetic
    analogue and might interact with the vitamin D
    receptor differently in various cell systems. It has been
    reported that vitamin D3 might improve glycemic control.
    7 Vitamin D2 has been reported to cause worsening
    of glycemic control in people of East Indian descent.8
    Is this because of vitamin D receptor polymorphism, or
    because of enhanced 24-hydroxylase enzyme activation,
    or is it due to how vitamin D2 interacts with the receptor?
    Until this has been sorted out, I feel safest using
    vitamin D3. There are about 2000 synthetic analogues
    of vitamin D. The search is on for one that can cross the
    blood-brain barrier to treat certain types of brain cancers
    without causing hypercalcemia.9 But then again,
    what other effects would this compound have? There
    are still so many unknowns.
    The first step is to recognize that most Canadians
    do not get enough vitamin D, especially in the winter
    months, because of where we live. This recognition
    might reduce the need for expensive drugs to treat
    various conditions and might improve the well-being of
    many Canadians.
    An ounce of prevention is worth a pound of cure.
    —Gerry Schwalfenberg MD CCFP
    Edmonton, Alta
    by e-mail

    here's the orig article which is one of the most excellent summaries I've seen so far -- great minds think alike -- they advise > 50ng/ml like DR. Davis as well!
    http://www.cfp.ca/cgi/reprint/53/5/841

  • Neelesh

    11/27/2007 4:05:00 AM |

    D,
    Interesting study indeed. Thanks for the information. I guess I have a lot of things to discuss with my cardiologist next week. Smile
    -Neelesh

  • chickadeenorth

    12/2/2007 11:16:00 PM |

    Hi to Gerry Schwalfenberg MD CCFP, do you know any Dr In Edtmn who practices Track your Plague, if so could you suggest names to help me. I live out by Jasper and need a skilled Dr in this treatment program, I would travel to Edtmn.Many thanks.
    chickadeenorth
    (hope its ok for me to ask this here)

  • cadoce66

    4/5/2008 8:37:00 PM |

    hi my aunts 63 yrs and she underwent an angioplasty with a medicated stent .. Shes on PLAVIX and her artery was 90% blocked and she had an evolving AWMI...
    Please advise what she should taketo prevent another blockage or heart attack!
    Thanks!

  • buy jeans

    11/3/2010 10:34:10 PM |

    So, Dave, please forgive your doctor his misunderstanding of the increase in your heart scan score. He is not alone in his ignorance of the data and parroting of the mainstream mis-information popular among the statin-is-the-answer-to-everything set.

Loading