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Embargoed news from Annals of Internal Medicine
Date:9/6/2010

1. A Low-carb Diet Based on Animal Protein May Increase Death Risk

Evidence shows that a low-carbohydrate diet produces weight loss and improves some cardiovascular risk factors. However, health effects of a low-carbohydrate diet may depend on the type of protein and fat consumed. Researchers followed 85,168 women and 44,548 men on a low-carbohydrate diet for 26 and 20 years respectively. The patients ate either an animal-based (emphasizing animal sources of fat and protein) low-carbohydrate diet, or a vegetable-based low-carbohydrate diet. The researchers found that diets that emphasized animal sources of fat and protein were associated with higher all-cause mortality in both men and women. A vegetable-based low-carbohydrate diet was associated with lower all-cause and cardiovascular disease mortality rates. The researchers conclude that while major macronutrient content may be similar in both diets, the source of the macronutrients can result in large differences in dietary components that may affect mortality such as specific fatty acids, protein, fiber, vitamins and minerals, and phytochemicals.


2. Patients Overestimate the Benefits of Percutaneous Coronary Intervention (Angioplasty)

Compared with medical therapy, percutaneous coronary intervention, or PCI (commonly known as angioplasty) reduces angina symptoms, but does not reduce risk of myocardial infarction or death. However, it is not known whether patients understand the limits of what PCI procedures can offer. Researchers surveyed 153 patients who consented to elective cardiac catheterization with PCI if indicated by catheterization results and 27 cardiologists about the expected benefits of the procedure. Cardiologists' beliefs paralleled the available evidence. Conversely, most patients thought that PCI would prevent infarction or death. The researchers conclude that physicians and patients may need to discuss anticipated benefits prior to PCI to p
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Contact: Angela Collom
acollom@acponline.org
215-351-2653
American College of Physicians
Source:Eurekalert

Page: 1 2

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