Cardiology

These experts share their personal diets and how they approach nutrition with their patients to try to prevent heart disease.

"This study clearly goes against what has been the common wisdom for the last 30, 40 years," said one cardiologist.

The former president paid tribute to Dr. Mark Hausknecht, describing him as "a fantastic cardiologist and a good man."

Women -- who are at higher risk than men for certain dangerous arrhythmias, and subsequent stroke in some cases -- are often told that their palpitations are "just due to anxiety." But even though they can be triggered by anxiety, it is important for doctors to rule out any dangerous arrhythmias before dismissing the palpitations as only the result of worrying.