Viagra and cardiac risk. Part 2

1Nov

The study found that 35 percent of 374 heart failure patients admitted to Duke between March 1997 and June 1998 were diagnosed with depression, based on a standard battery of psychological tests. Furthermore, 14 percent of this group of patients were classified as having major depression. The extent and degree of depression in those patients is much higher than would have been expected if the patients were just reacting to the fact that they were sick

Red wine and grape juice

Two other studies shed more light on the mechanisms behind the protective effects of red wine and purple grape juice when it comes to heart disease. Flavonoid, a chemical present in both beverages, is believed to protect against coronary heart disease by preventing the development of blood clots and by promoting the relaxation of blood vessel walls (dilation).

Researchers at Georgetown University Medical Center in Washington, D.C., found that grape juice decreased the buildup of platelets and increased the release of nitric oxide — which helps prevent the aggregation of platelets on blood vessel walls — in 22 healthy people who drank specified amounts of purple grape juice for 14 days.

Another study at the University of California, Davis, assessed the effects of alcohol, red wine and quercetin, a major flavonoid constituent in red wine, on relaxing the walls of blood vessels in rabbits. Red wine produced a slight, passing relaxation, while alcohol alone had no such effect. Quercetin, on the other hand, had a marked relaxation effect on the coronary arteries of the rabbits. Quercetin is found in fruits, vegetables, and tea, as well as red wine.

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