Heart Scan Curiosities #8: Fat heart 8. July 2007 William Davis (2) Here's a curious incidental finding on a heart scan: an unusual fat accumulation around the heart. The arrows point to an unusually large accumulation of fat tissue on either side of the heart. This man was mildly but not excessively overweight at 5 ft 10 inches and 201 lbs. I know of no specific implications of this curiosity. It makes me wonder if he was very obese at one time and has since lost the weight.
Chocolate and blood pressure 7. July 2007 William Davis (1) A recent very detailed and clean study on the effects of a small serving of dark chocolate on blood pressure was just published in the Journal of the American Medical Association. I was going to do a little Blogging on this interesting study but I read the Fanatic Cook's wonderfully insightful comments. I'd direct you to her discussion, instead: A small daily dose of dark chocalate lowers blood pressure at http://fanaticcook.blogspot.com/. I couldn't have said it any better. By the way, the authors of the study had no financial ties to the chocolate or cocoa industry. Refreshing.
Does prevention save money? 7. July 2007 William Davis (2) Prevention and reversal of heart disease are undoubtedly preferable to the current crash and repair model currently followed by doctors and hospital, the model that has created an enormous medical device industry to support it. But does it save money? This debate often boils down to a metric of "lives saved per $100,000". Thus, the statin drugs (of course) have been subjected to such analyses and have been shown to be "cost-effective." But how does a powerful heart disease prevention and reversal program like Track Your Plaque compare to the current crash and repair procedural approach to heart disease? This is a very difficult analysis, one that is subject to enormous variation, depending on the population studied and the prevalence of disease, the local practice habits (e.g., in the northwest Cleveland suburb of Lorain, virtually everybody going to the hospital for any heart problem gets one or several heart catheterizations), and other factors. There's also the difficulty of what should constitute a prevention program. Is it like that used in the COURAGE Trial of "optimal medical therapy" that included nitroglycerin, aspirin, a beta blocker, and statin drug (which we regard as a laughably silly approach), or one like Track Your Plaque in which we try to correct the causes of heart disease, not just palliate (BandAid) them? Costs vary. The "optimal medical therapy" is very costly due to its reliance on medications to treat symptoms. Our program is somewhat costly because of the reliance on a CT heart scan and lipoprotein analysis (though, in the long perspective, our costs are modest). We asked this question and came up with a lengthy analysis. Bottom line: Following the Track Your Plaque program saves enormous sums of money. Because of the complexity of the analysis, which is theoretical and not a real-world test, we confined our analysis to men in the 40-59 year old age group. If this group alone were to subscribe to a intensive but rational program of prevention like Track Your Plaque, over $20 billion dollars per year would be saved. If the analysis were extended to women of all ages and men older than 59, the numbers would balloon to many more tens of billions of dollars. Such a savings wouldn't cure the healthcare system's growing financial crisis, but it sure would be a big help. Sort of like converting to a hydrid car--you don't eliminate the need for gas, but you'll save a lot in fuel costs. The Track Your Plaque approach makes sense because it is, bar none, the most powerful approach to gaining hold of heart disease risk available. But it also makes sense from a financial standpoint. Now, if we can only convince the hospitals, the $30 million annual salary device manufacturer CEO, and my procedure-crazy colleagues that this way makes more sense. Watch for our analysis on an upcoming Track Your Plaque Special Report.
Where should fiber come from? 7. July 2007 William Davis (1) Ray had the usual protuberant belly overhanging his beltline of someone who was over-reliant on processed starches, particularly wheat. After all, he ran a sandwich bakery. He sheepishly admitted that he ate the products of his own production line every day while at work, even bringing a few sandwiches home.At 5 ft 10 inches, 201 lbs, he wasn't terribly overweight, but all the excess was in his beltline. He had the lipoproteins to match: HDL 38 mg/dl, triglycerides 180 mg/dl, 83% of all LDL particles were small, excess VLDL and IDL. Blood pressure: 140/88. Blood sugar: 112 mg/dl. With a CT heart scan score of 698, Ray had some work to do. Among the strategies we discussed was a need to dramatically reduce, perhaps eliminate, wheat products and other high-glycemic index foods. "You've got to be kidding me!" Besides the inconsistency with his business, he was puzzled on what foods were edible for his pattern. We discussed how he could easily replace his reliance on wheat and breads with more vegetables, more fruits, more lean proteins, and more healthy oils. "But I won't get any fiber!" he declared. That was why he tried to choose whole wheat bread for his sandwiches. This is a common concern when we discuss how grains, particuarly wheat, need to be sharply reduced. In the most recent edition of his Paleo Diet Newsletter, Dr. Loren Cordain has laid out a wonderful graph that beautifully illustrates the issue: (From The Paleo Diet Newsletter at http://www.thepaleodiet.com/newsletter/back_issues.shtml)In other words, reducing or eliminating "fiber-rich" grains and replacing their calories dramatically increases fiber content of your diet.For Ray, whose livelihood depends on promoting and perpetuating the use of wheat breads, it will be tough to keep him on the right track. My prediction: the results he will see will be substantial and it will become difficult to return to eating his own products. There's no doubt that this concept can be economically disruptive for many people, including Ray. It's a tough situation we've created: a huge industrial complex based on growing grains and wheat, processing it into breakfast cereals, bagels, pretzels, crackers, and sandwiches. But it has also contributed to the epidemic of obesity and the patterns that people like Ray have. But the startling fact remains: If replaced with vegetables and fruits, reducing grains increases the fiber content of your diet, and not jsut a little bit, but enormously. If green peppers and spinach had brand names like "Fiber One" and "Smart Start" along with flashy boxes, then maybe it would be an easier concept to grasp. To sign up for Dr. Cordain's wonderfully informative newsletter, go to http://www.thepaleodiet.com/newsletter/back_issues.shtml.
The Detection Gap 5. July 2007 William Davis (3) You've heard of the Generation Gap, the Income Gap, the Technology Gap, the Gender Gap, and the Achievement Gap.How about the Detection Gap? Haven't heard of it? That's the gap between coronary heart disease detected by conventional methods widely practiced in the community and the real prevalence of the disease.The standard approach to coronary heart disease detection is a relatively simple formula. One of three things are sought:1) Symptoms of heart disease like chest pain or breathlessness. 2) An abnormal EKG or abnormal stress test.3) A catastrophe like heart attack or sudden cardiac death. By this equation, the American Heart Association (AHA) estimates that 36% of American men and women have coronary disease. However, we say the number is more like 48%. That's the number we arrive at when we ask: How many men and women have CT heart scan scores above zero?The difference is the Detection Gap. Though only around 12%, it amounts to millions of people. The problem is that, by the conventional approach to detection of heart disease, you often don't know you have it until you're lying on a hospital gurney being wheeled off to a major procedure. Or your friends, family or neighbors find your body.If heart disease is detected by a CT heart scan, it tends to be early, before catastrophe strikes. You can use tools like niacin, vitamin D, flaxseed, etc., all the components of the Track Your Plaque approach. If heart disease is detected by waiting for the appearance of symptoms, then a stress test (usually nuclear) is followed by a heart catheterization, stents, bypass, etc. So there's more than a Detection Gap. There's also a difference in the sorts of therapies chosen. There's certainly a difference in cost. In my view, there is no rational reason not to close the Detection Gap. While CT heart scan scores aren't perfect, they're damn close. The Detection Gap could be closed to around 2%. We'd also save billions of dollars.
Apoprotein B on VAP 3. July 2007 William Davis (3) We've just received an announcement that, if your Vertical Auto Profile lipoprotein test (Atherotech) is provided through the national Quest laboratories (a large national laboratory company), they will include an apoprotein B. This represents an improvement over the previous "direct LDL," a measured LDL cholesterol. Recall that standard lipid panels obtained in hospitals and doctors' offices is a calculated LDL, based on the 40-some year old Friedewald calculation. In my view, the Friedewald calculated LDL is a dinosaur that is virtually useless and needs to be retired. Direct, or measured, LDL is a slight improvement. It removes some of the inaccuracy introduced by the assumptions built into the calculated value. Apoprotein B (also called apoprotein B100) is yet another improvement. Apo B's have been available for years, but was not provided on the VAP. The Atherotech people have done a good job of making VAP more broadly available through "drawing stations" and proponents like Life Extension. Adding an ApoB is a favorable development, since it incorporates the risk of other ApoB-containing particles, like VLDL, IDL, and Lp(a). Several studies like the Quebec Cardiovascular Study have shown that ApoB is a superior predictor of heart disease compared to calculated LDL. I still believe that the gold standard for assessing risk from an LDL standpoint is the LDL particle number along with the other measures provided by the NMR assay (Liposcience). However, the addition of the ApoB to VAP adds greater confidence to the measures provided by this technique. Those of you who rely on the VAP assay provided by Quest for your Track Your Plaque program for control of CT heart scan scores therefore have access to this improved panel.
Estrogens and CT heart scan scores 2. July 2007 William Davis (1) A recent study from the Women's Health Initiative (WHI), the large study that originally showed no reduction in heart attack with use of estrogens in postmenopausal females, has just published a new study.In this new effort, women who took Premarin (horse estogens) had up to 61% lower CT heart scan scores. This new study was confined to the women from the original WHI study who had entered the study between the ages of 50-59 years (average 55 years old), since this was the significant subgroup of women who actually showed a reduction in heart attack risk, whereas other groups showed no benefit or a slightly increased risk. For a full discussion of this fascinating result, see the Track Your Plaque report, Can estrogen reduce CT heart scan scores? at http:/ Toggle navigation Home Blog Home Archive Join Now Log in Synthroid, Armour Thyroid, and the battle for T3 6. July 2008 William Davis (2) In the last Heart Scan Blog post on thyroid issues, Is normal TSH too high?, the provocative findings of the the HUNT Study were discussed. The text of the study can be found at:The association between TSH within the reference range and serum lipid concentrations in a population-based study. The HUNT StudyHypothyroidism, or low thyroid that is signaled by high thyroid-stimulating hormone, TSH, is proving far more prevalent an issue than previously thought. While previous estimates put hypothyroidism as affecting only about 3% of younger populations, 10-20% of older populations (women more so), data like the HUNT Study suggest that, if lower and lower TSH levels (higher thyroid) are necessary for perfect heart health, then many more people stand to benefit than we used to think.But another crucial issue in the world of hypothyroidism: Is T4 (thyroxine) enough? Or should we be supplementing T3 (triiodothyronine) along with T4?Your friendly neighborhood primary care doctor or endocrinologist would likely argue vehemently that T4 (as Synthroid, Levoxyl, levothyroxine, and others) is adequate and not subject to the impurities and contaminants of natural thyroid extracts. They would also argue that T4 is effectively converted to T3 at the tissue level, and exogenous supplementation is unnecessary.Others--most of all thyroid patients themselves, along with thyroid advocates like Mary Shomon and Janie Bowthorpe, along with some physicians--argue that supplementing T3 along with T4 can be very important. They argue that people feel better, have more physical energy, lose weight more effectively, and more completely resolve many of the phenomena of hypothryoidism with T3 added. There are also some data that argue the same.Adding T3 to the mix may address the presumed poor conversion of T4 to T3 that is peculiar to some people. It may overcome the "reverse T3" phenomenon, the production of a useless look-alike T3 that occurs in some people. It may also (anecdotally) exert greater effects on some lipid/lipoprotein parameters, such as Lp(a).My experiences adding T3 to T4 have been mixed: Some feel better, others do not. Some show objective improvements, others do not.Nonetheless, hypothyroidism, or incompletely corrected hypothryoidism by way of inadequate T3, is an issue to consider in your plaque-control program.More on this somewhat complex issue, along with practical solutions to consider, can be found on the Special Report to be released this week on the Track Your Plaque website. Letter to New York Times 3. July 2008 William Davis (9) All right. I sent a Letter to the Editor to the New York Times. No word from them; it's no longer news.So here is what I tried to convey.While the authors overall did a credible job of talking to my colleagues and laying out the issues, they made the crucial and boneheaded mistake of confusing CT heart scans with CT coronary angiograms. Sadly, many people who may have been considering having a simple screening heart scan may be scared away by the confused authors, Alexn Berenson and Reed Abelson. They do correctly point out that, while CT coronary angiograms are fascinating examples of technology and a way of visualizing coronary arteries, this test all too often is being subverted into the "let's make money from high-tech testing" medical model. It's also a test that frequently leads to the "real" test, heart catheterization, since the "time bomb" you have in your arteries might "need" a stent. CT coronary angiograms are also virtually useless for purposes of tracking disease, since they are not longitudinally (along the length of the artery) quantitative, nor should anyone be exposed to this much radiation repeatedly. A simple heart scan, on the hand, provides a longitudinal summation of coronary plaque volume. Radiation exposure is sufficiently low that repeated scanning can be performed for purposes of tracking . . .yes, track your plaque. Poorly-informed reporters can do a lot of damage. As always, you and I must dig a little deeper for the truth. Dear Editor,Re: Weighing the Costs of a CT Scan’s Look Inside the HeartThe Times featured an article on June 29th that discussed rapidly expanding use of CT scans for the heart:Weighing the Costs of a CT Scan’s Look Inside the Heart. The authors, Alex Berenson and Reed Abelson, stated that CT heart scans “expose patients to large doses of radiation, equivalent to at least several hundred X-rays, creating a small but real cancer risk.”I’d like to offer a clarification. Though the authors discuss both CT heart scans and CT coronary angiograms, they confuse the two and use the terms interchangeably. A heart scan is a simple screening test for coronary atherosclerotic plaque. It detects the presence of calcium in the heart’s arteries, provided as a “score.” (Because calcium occupies 20% of total plaque volume, knowing the amount of calcium tells you how much total coronary plaque is present by applying this simple proportion.) Just having a high score should not prompt heart procedures, since people undergoing simple screening heart scans are without symptoms. However, a stress test may yield some useful information. On present-day CT devices, heart scans expose a patient to 0.4 mSv of radiation on an electron-beam, or EBT, device, and on up to 1.2 mSv on a 64-slice multi-detector, or MDCT, device, compared to 0.1 mSv during a standard chest x-ray. CT heart scans are therefore performed with about the same quantity of radiation as a mammogram done to screen women for breast cancer, or about the equivalent of four chest x-rays on an EBT scanner, up to 12 chest-xrays on a MDCT scanner. CT coronary angiograms, while performed on the same devices as heart scans, require x-ray dye to fill the contours of the coronary arteries. It also requires up to several hundred times more radiation. While new engineering innovations are being introduced that promise to reduce this exposure, the current devices being used today do indeed require a radiation dose equivalent to 100 to 400 chest x-rays (usually in the range of 10-15 mSv), a value that equals or exceeds that obtained during a conventional heart catheterization. While heart scans are most useful to detect and quantify plaque that can help determine the intensity of a heart disease prevention program, CT coronary angiograms are generally used as prelude to hospital procedures like catheterizations, stents and bypass surgery. That’s because they are performed to look for (or rule out) “severe” blockages. CT heart scans and CT coronary angiography are therefore two different tests that yield two different kinds of information, and yield two entirely different levels of radiation exposure. This confusion from a major and respected media outlet like the New York Times is unfortunate, because it could persuade millions of people who otherwise could benefit from simple heart scans to avoid them because of misleading information on radiation exposure of a different test. Thank you. William Davis, MD Red yeast rice alert 2. July 2008 William Davis (9) While there have been some positive reports in the media lately about the cholesterol-reducing effects of red yeast rice, Consumer Lab has issued a very concerning report. Because Consumer Lab is a subscription website (incidentally, the $20 per year membership fee is money well spent for insightful tests on many supplements, though new reports only come out a handful of times per year), I won't discuss the results of their red yeast rice in its entirety. However, Consumer Lab testing uncovered several disturbing findings:--The lovastatin content varied by a factor of 100, from 0.1 mg per tablet/capsule in one brand up to 10.6 mg in another brand. By FDA regulations, lovastatin is a drug and NO red yeast rice preparation is supposed to contain ANY lovastatin. Nonetheless, despite the marketing of supplement manufacturers, it is probably the lovastatin that is largely responsible for the LDL-reducing effect. The monacolins or mevinolins in red yeast rice add little, if any, further LDL-reducing effect. --Several preparations contain a potential kidney toxin called citrinin. The Walgreen's product, specifically, contained substantial quantities of this toxin.Interestingly, the FDA has taken repeated action against red yeast rice manufacturers and distributors because they continue to contain lovastatin. In the FDA's most recent action in August, 2007, for instance, Swanson's product and Sunburst Biorganics' Cholestrix, were both sent letters to stop selling their product because it contained lovastatin. The Consumer Lab findings would explain the enormous variation in LDL-reducing effect of various red yeast rice products. In my experience, some work and reduce LDL 40 mg/dl or so, some fail to reduce LDL at all, others generate a modest effect, e.g., 5-10 mg/dl LDL reduction.In effect, red yeast rice IS a statin drug, albeit a highly variable and weak one. Although readers of The Heart Scan Blog know that I am a big fan of nutritional supplements and self-empowerment in health, I am a bigger fan of truth. I despise B--- S---- of the sort that emits from some nutritional supplement manufacturers and drug companies. I am puzzled by much of the public's readiness to embrace a statin drug if it comes from a supplement company while avoiding it if it comes from a drug manufacturer. Personally, I do not like the drug industry, their questionable (at best) ethics, their aggressive marketing tactics, their sleazy sales people. But, in this instance, if a statin effect is desired, I'd reach for generic lovastatin before I purchased red yeast rice. The Consumer Lab report tells us that red yeast rice IS essentially a statin drug, an inconsistent one that often contains a potential toxin. "Average amount of heart disease for age" 2. July 2008 William Davis (4) A 72-year old woman came to my office after a complicated hospital stay (unrelated to heart disease). She'd undergone a CT coronary angiogram and heart scan as part of a pre-operative evaluation prior to a surgery for a non-heart related condition. The heart scan portion of the test (I was impressed they even did this) yielded a heart scan score of 212. The CT coronary angiogram portion of the test revealed a 50% blockage in one artery, a lesser blockage in one other artery. The cardiologist consulting on the case advised her that the amount of coronary disease detected was insufficient to pose risk during her surgical procedure. He also advised her that she had "an average amount of disease for age." He thought that nothing further was necessary since she was "average." Say what? What if I told you that you have an average amount of cancer for your age? After all, cancers become more common the older we get. Who would find that acceptable? Then why should ANY amount of coronary atherosclerotic plaque be "acceptable for age"? Coronary plaque is a degenerative disease that poses risk for rupture. While it is indeed common, by no means should it be acceptable. I would bet that this same cardiologist would be from the same school of thought that would be eager to advise heart catheterization, stent, and other procedures--revenue-generating procedures--should she have a heart attack appropriate for age. I wish that I could tell you that this silly comment was provided by some peculiar, "everyone-knows-he's-crazy" doctor. But it was not. It was a solidly mainstream physician. He pooh-poohs nutrition, laughs when asked about nutritional supplements, thinks anyone complaining about symptoms less than a full-blown heart attack is a baby. He is respected by the primary care physicians, lectures on the advantages of prescription medications. In short, he is your typical conventional cardiologist.This is the way they think. I know, because I was one of them. Thankfully, something banged me upside my head one day (my Mother's sudden cardiac death) and tipped me off to the painful irony of the conventional approach to heart disease. There is NO amount of coronary disease appropriate for age. This notion is a remnant of the paternalistic, "I-know-better-than-you" attitude of the last century of medicine. The 21st century promises a new age. Quantum leaps 29. June 2008 William Davis (6) A reader of The Heart Scan Blog and member of the Track Your Plaque program posted this comment on The Heart.org:*The facts speak for themselves.* Dr. William Davis and Dr. William Blanchet, your patients thank you for the low cost PREVENTIVE care you prescribe. The published facts speak for themselves. It is indeed a sad state of affairs, that the larger cardiology community does not take the time to research the data and results you have been reporting. Unfortunately it is the patients who are the victims of the mainstream, inappropriate, treatment protocols, as evidenced with the ongoing high rate of CV death rate. I am dumbfounded by the lack of open-minded inquisitive curiosity to thoroughly research your claims by many/most cardiologists. Understood, we are all busy, but that is no excuse to stick with practices that do not result in major breakthrough improvements in patient outcomes. Then again, we are all humans, and when "we" are convinced that "our" approach is correct, "we" tend to conveniently ignore any evidence to the contrary. "We" like to believe "we" have been right all along. A very insightful book, recently published, says it all in its title:
Synthroid, Armour Thyroid, and the battle for T3 6. July 2008 William Davis (2) In the last Heart Scan Blog post on thyroid issues, Is normal TSH too high?, the provocative findings of the the HUNT Study were discussed. The text of the study can be found at:The association between TSH within the reference range and serum lipid concentrations in a population-based study. The HUNT StudyHypothyroidism, or low thyroid that is signaled by high thyroid-stimulating hormone, TSH, is proving far more prevalent an issue than previously thought. While previous estimates put hypothyroidism as affecting only about 3% of younger populations, 10-20% of older populations (women more so), data like the HUNT Study suggest that, if lower and lower TSH levels (higher thyroid) are necessary for perfect heart health, then many more people stand to benefit than we used to think.But another crucial issue in the world of hypothyroidism: Is T4 (thyroxine) enough? Or should we be supplementing T3 (triiodothyronine) along with T4?Your friendly neighborhood primary care doctor or endocrinologist would likely argue vehemently that T4 (as Synthroid, Levoxyl, levothyroxine, and others) is adequate and not subject to the impurities and contaminants of natural thyroid extracts. They would also argue that T4 is effectively converted to T3 at the tissue level, and exogenous supplementation is unnecessary.Others--most of all thyroid patients themselves, along with thyroid advocates like Mary Shomon and Janie Bowthorpe, along with some physicians--argue that supplementing T3 along with T4 can be very important. They argue that people feel better, have more physical energy, lose weight more effectively, and more completely resolve many of the phenomena of hypothryoidism with T3 added. There are also some data that argue the same.Adding T3 to the mix may address the presumed poor conversion of T4 to T3 that is peculiar to some people. It may overcome the "reverse T3" phenomenon, the production of a useless look-alike T3 that occurs in some people. It may also (anecdotally) exert greater effects on some lipid/lipoprotein parameters, such as Lp(a).My experiences adding T3 to T4 have been mixed: Some feel better, others do not. Some show objective improvements, others do not.Nonetheless, hypothyroidism, or incompletely corrected hypothryoidism by way of inadequate T3, is an issue to consider in your plaque-control program.More on this somewhat complex issue, along with practical solutions to consider, can be found on the Special Report to be released this week on the Track Your Plaque website.
Letter to New York Times 3. July 2008 William Davis (9) All right. I sent a Letter to the Editor to the New York Times. No word from them; it's no longer news.So here is what I tried to convey.While the authors overall did a credible job of talking to my colleagues and laying out the issues, they made the crucial and boneheaded mistake of confusing CT heart scans with CT coronary angiograms. Sadly, many people who may have been considering having a simple screening heart scan may be scared away by the confused authors, Alexn Berenson and Reed Abelson. They do correctly point out that, while CT coronary angiograms are fascinating examples of technology and a way of visualizing coronary arteries, this test all too often is being subverted into the "let's make money from high-tech testing" medical model. It's also a test that frequently leads to the "real" test, heart catheterization, since the "time bomb" you have in your arteries might "need" a stent. CT coronary angiograms are also virtually useless for purposes of tracking disease, since they are not longitudinally (along the length of the artery) quantitative, nor should anyone be exposed to this much radiation repeatedly. A simple heart scan, on the hand, provides a longitudinal summation of coronary plaque volume. Radiation exposure is sufficiently low that repeated scanning can be performed for purposes of tracking . . .yes, track your plaque. Poorly-informed reporters can do a lot of damage. As always, you and I must dig a little deeper for the truth. Dear Editor,Re: Weighing the Costs of a CT Scan’s Look Inside the HeartThe Times featured an article on June 29th that discussed rapidly expanding use of CT scans for the heart:Weighing the Costs of a CT Scan’s Look Inside the Heart. The authors, Alex Berenson and Reed Abelson, stated that CT heart scans “expose patients to large doses of radiation, equivalent to at least several hundred X-rays, creating a small but real cancer risk.”I’d like to offer a clarification. Though the authors discuss both CT heart scans and CT coronary angiograms, they confuse the two and use the terms interchangeably. A heart scan is a simple screening test for coronary atherosclerotic plaque. It detects the presence of calcium in the heart’s arteries, provided as a “score.” (Because calcium occupies 20% of total plaque volume, knowing the amount of calcium tells you how much total coronary plaque is present by applying this simple proportion.) Just having a high score should not prompt heart procedures, since people undergoing simple screening heart scans are without symptoms. However, a stress test may yield some useful information. On present-day CT devices, heart scans expose a patient to 0.4 mSv of radiation on an electron-beam, or EBT, device, and on up to 1.2 mSv on a 64-slice multi-detector, or MDCT, device, compared to 0.1 mSv during a standard chest x-ray. CT heart scans are therefore performed with about the same quantity of radiation as a mammogram done to screen women for breast cancer, or about the equivalent of four chest x-rays on an EBT scanner, up to 12 chest-xrays on a MDCT scanner. CT coronary angiograms, while performed on the same devices as heart scans, require x-ray dye to fill the contours of the coronary arteries. It also requires up to several hundred times more radiation. While new engineering innovations are being introduced that promise to reduce this exposure, the current devices being used today do indeed require a radiation dose equivalent to 100 to 400 chest x-rays (usually in the range of 10-15 mSv), a value that equals or exceeds that obtained during a conventional heart catheterization. While heart scans are most useful to detect and quantify plaque that can help determine the intensity of a heart disease prevention program, CT coronary angiograms are generally used as prelude to hospital procedures like catheterizations, stents and bypass surgery. That’s because they are performed to look for (or rule out) “severe” blockages. CT heart scans and CT coronary angiography are therefore two different tests that yield two different kinds of information, and yield two entirely different levels of radiation exposure. This confusion from a major and respected media outlet like the New York Times is unfortunate, because it could persuade millions of people who otherwise could benefit from simple heart scans to avoid them because of misleading information on radiation exposure of a different test. Thank you. William Davis, MD
Red yeast rice alert 2. July 2008 William Davis (9) While there have been some positive reports in the media lately about the cholesterol-reducing effects of red yeast rice, Consumer Lab has issued a very concerning report. Because Consumer Lab is a subscription website (incidentally, the $20 per year membership fee is money well spent for insightful tests on many supplements, though new reports only come out a handful of times per year), I won't discuss the results of their red yeast rice in its entirety. However, Consumer Lab testing uncovered several disturbing findings:--The lovastatin content varied by a factor of 100, from 0.1 mg per tablet/capsule in one brand up to 10.6 mg in another brand. By FDA regulations, lovastatin is a drug and NO red yeast rice preparation is supposed to contain ANY lovastatin. Nonetheless, despite the marketing of supplement manufacturers, it is probably the lovastatin that is largely responsible for the LDL-reducing effect. The monacolins or mevinolins in red yeast rice add little, if any, further LDL-reducing effect. --Several preparations contain a potential kidney toxin called citrinin. The Walgreen's product, specifically, contained substantial quantities of this toxin.Interestingly, the FDA has taken repeated action against red yeast rice manufacturers and distributors because they continue to contain lovastatin. In the FDA's most recent action in August, 2007, for instance, Swanson's product and Sunburst Biorganics' Cholestrix, were both sent letters to stop selling their product because it contained lovastatin. The Consumer Lab findings would explain the enormous variation in LDL-reducing effect of various red yeast rice products. In my experience, some work and reduce LDL 40 mg/dl or so, some fail to reduce LDL at all, others generate a modest effect, e.g., 5-10 mg/dl LDL reduction.In effect, red yeast rice IS a statin drug, albeit a highly variable and weak one. Although readers of The Heart Scan Blog know that I am a big fan of nutritional supplements and self-empowerment in health, I am a bigger fan of truth. I despise B--- S---- of the sort that emits from some nutritional supplement manufacturers and drug companies. I am puzzled by much of the public's readiness to embrace a statin drug if it comes from a supplement company while avoiding it if it comes from a drug manufacturer. Personally, I do not like the drug industry, their questionable (at best) ethics, their aggressive marketing tactics, their sleazy sales people. But, in this instance, if a statin effect is desired, I'd reach for generic lovastatin before I purchased red yeast rice. The Consumer Lab report tells us that red yeast rice IS essentially a statin drug, an inconsistent one that often contains a potential toxin.
"Average amount of heart disease for age" 2. July 2008 William Davis (4) A 72-year old woman came to my office after a complicated hospital stay (unrelated to heart disease). She'd undergone a CT coronary angiogram and heart scan as part of a pre-operative evaluation prior to a surgery for a non-heart related condition. The heart scan portion of the test (I was impressed they even did this) yielded a heart scan score of 212. The CT coronary angiogram portion of the test revealed a 50% blockage in one artery, a lesser blockage in one other artery. The cardiologist consulting on the case advised her that the amount of coronary disease detected was insufficient to pose risk during her surgical procedure. He also advised her that she had "an average amount of disease for age." He thought that nothing further was necessary since she was "average." Say what? What if I told you that you have an average amount of cancer for your age? After all, cancers become more common the older we get. Who would find that acceptable? Then why should ANY amount of coronary atherosclerotic plaque be "acceptable for age"? Coronary plaque is a degenerative disease that poses risk for rupture. While it is indeed common, by no means should it be acceptable. I would bet that this same cardiologist would be from the same school of thought that would be eager to advise heart catheterization, stent, and other procedures--revenue-generating procedures--should she have a heart attack appropriate for age. I wish that I could tell you that this silly comment was provided by some peculiar, "everyone-knows-he's-crazy" doctor. But it was not. It was a solidly mainstream physician. He pooh-poohs nutrition, laughs when asked about nutritional supplements, thinks anyone complaining about symptoms less than a full-blown heart attack is a baby. He is respected by the primary care physicians, lectures on the advantages of prescription medications. In short, he is your typical conventional cardiologist.This is the way they think. I know, because I was one of them. Thankfully, something banged me upside my head one day (my Mother's sudden cardiac death) and tipped me off to the painful irony of the conventional approach to heart disease. There is NO amount of coronary disease appropriate for age. This notion is a remnant of the paternalistic, "I-know-better-than-you" attitude of the last century of medicine. The 21st century promises a new age.
Quantum leaps 29. June 2008 William Davis (6) A reader of The Heart Scan Blog and member of the Track Your Plaque program posted this comment on The Heart.org:*The facts speak for themselves.* Dr. William Davis and Dr. William Blanchet, your patients thank you for the low cost PREVENTIVE care you prescribe. The published facts speak for themselves. It is indeed a sad state of affairs, that the larger cardiology community does not take the time to research the data and results you have been reporting. Unfortunately it is the patients who are the victims of the mainstream, inappropriate, treatment protocols, as evidenced with the ongoing high rate of CV death rate. I am dumbfounded by the lack of open-minded inquisitive curiosity to thoroughly research your claims by many/most cardiologists. Understood, we are all busy, but that is no excuse to stick with practices that do not result in major breakthrough improvements in patient outcomes. Then again, we are all humans, and when "we" are convinced that "our" approach is correct, "we" tend to conveniently ignore any evidence to the contrary. "We" like to believe "we" have been right all along. A very insightful book, recently published, says it all in its title: