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, also known as AFib, is an irregular heartbeat, or arrhythmia that happens when the upper chambers of the heart (the atria) are out of sync with the lower chambers and beating ...

Lone atrial fibrillation is a form of irregular heartbeat that can cause excessively fast beating. It only affects adults under 60 years old and can be asymptomatic or present symptoms, such as a ...

When you have transthyretin amyloid cardiomyopathy (ATTR-CM), proteins called amyloids build up in your heart, stiffening the muscle and interfering with its ability to pump blood throughout the body.

Atrial fibrillation, a rapid, irregular heart beat 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 U ...