Several studies conducted over the years have shown that eating an ounce of nuts four or five times a week can significantly reduce your risk of coronary artery disease, by as much as 40%. In fact, by 2003, the accumulated data was sufficient to move the the FDA to issue a formal statement saying that eating certain specific nuts --- almonds, hazelnuts, pecans, pistachios, walnuts, and peanuts -- can reduce the risk of heart disease.

When adding nuts to your diet, however, there are a few things to keep in mind to avoid the "tragic downside" of nuts for heart health. You can read all about nuts for heart health here.

In deep venous thrombosis (DVT) blood clots form in the deep veins of the legs. Not only can the DVT itself produce unpleasant symptoms, but also DVT can lead to the much more serious problem of pulmonary embolus.

Read about DVT, the problems it can cause, and its treatment.

The Long QT syndrome is an inherited disorder of the heart's electrical system that can cause sudden death, even in young, healthy individuals. Read about long QT syndrome, its causes and treatment, here.

Inappropriate sinus tachycardia (IST) is a condition in which an individual's resting heart rate is abnormally high (greater than 100 beats per minute), their heart rate increases rapidly with minimal exertion, and their rapid heart rate is accompanied by symptoms of palpitations, fatigue, and exercise intolerance. It is more common in women, and (while one hopes not) this may be why it is all too often written off by doctors as "anxiety." Read about IST, its causes and treatment, here.