Health A-Z: Atrial Fibrillation

205207-image

Atrial fibrillation is a heart rhythm disorder that causes a rapid and irregular heartbeat. The atria are the upper two chambers of the heart that receive blood from the rest of the body. They pump blood into the lower two chambers (the ventricles). Then the ventricles pump blood to the rest of the body.

More

Related Article(s)

Hypertension: Atrial Fibrillation - Health A-Z

Longstanding, uncontrolled hypertension coupled with heart disease is the most common cause of the heart rhythm disorder known as atrial fibrillation. People with atrial fibrillation experience periodic spells during which the upper chambers of their hearts quiver erratically. As… Read More
205207-image

Atrial Fibrillation - Health A-Z

What Is It?Atrial fibrillation is a heart rhythm disorder that causes a rapid and irregular heartbeat.The heart is a muscle that has four chambers through which blood flows. The two upper chambers are the atria. The two lower chambers… Read More
  • About PEC

    The Patient Education Center provides multimedia access to reliable and relevant medical information at and beyond the point of care. Our content is developed exclusively by Harvard Health Publications, the media and publishing division of the Harvard Medical School of Harvard University, and distributed by Health Media Network.