AFib causes your heart to beat abnormally, which is a type of arrhythmia, but there are treatments that can help. Atrial fibrillation (AFib) is a problem with your heart's electrical activity.

An atrial septal aneurysm (ASA) occurs when a bulge forms in the atrial septum, the membrane separating the heart's upper left and upper right chambers (atria). The atrial septum usually is relatively ...

The diagnosis of AF was based on the presence of atrial flutter or AF on ECGs from Framingham clinic visits, outside physician or hospital charts, or Holter reports adjudicated by at least two ...

The right atrium is roughly round in shape and has an extension known as the right atrial appendage. The sinus node—the part of the heart's electrical system that generates the heartbeat signal—is ...

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