Dr. Hugh Calkins answers the question: 'Atrial Fibrillation vs. Atrial Flutter?' — -- Question: My doctor told me I sometimes have atrial fibrillation and at other times have atrial flutter. What ...

Valvular atrial fibrillation (A-fib) involves a condition that leads to an irregular or abnormal heart rhythm. This can increase a person’s risk of cardiovascular complications, such as stroke.

Atrial fibrillation, a rapid, irregular heartbeat that can lead to stroke or sudden death, is three times more common than previously thought, affecting nearly 5% of the population, or 10.5 million ...

Running has so many health benefits, it’s counterintuitive to consider any negative effects endurance training may have on the body. However, research suggests that some runners may be at higher risk ...

Atrial fibrillation (AFib) is a heart condition characterized by an irregular and often rapid heartbeat. However, some individuals may experience a standard heart rate without medication, depending on ...

Researchers estimate there are at least 10.5 million cases of atrial fibrillation nationwide. (Getty Images) Atrial fibrillation, an irregular heartbeat, is three times more common than previously ...