What is the cause of atrial fibrillation?

Answer by  shall8188 (266)

There are several different causes, and usually there is no evidence of an underlying heart condition. Having an overactive thyroid is one cause. A few others are using alcohol, blood clot in the lungs, or pneumonia. Of course, heart problems are a cause as well, such as heart valve disease, coronary heart disease and many other heart conditions.

Answer by  starmlw (960)

This happens with the electrical system of the heart has a malfunction that causes the top part of the heart muscles (the artia) to just flutter instead of fully contract and pump blood. This can be caused by anything that damages that electrical signal such as a heart attack or a birth defect.

Answer by  HarryK (46)

Abnormalities in the transmission of electrical impulses cause the muscles of the atria, the upper two chambers of the heart, to contract in an uncoordinated manner (i.e., fibrillation).

Answer by  dfridman (14)

reentrance, dead heart muscle that can`t take the electrical connection well, heart attack, anoumalous fibers, cardiomegaly, taquicardia, ischemic muscle and valvas diseases

Answer by  Adrian29 (547)

Atrial Fibrillation Is a common cardiac arrhythmia of the heart. It happens when the top two chambers of the heart do not beat correctly.

Answer by  kungfukid (1241)

atrial fibrillation is caused be an abnormality in the heart. That can be caused by trauma or high blood pressure, heart attacks, and sleep apnea.

Answer by  Bobinski (1652)

Damage or abnormalities to the heart structure are the most common cause. Possible other causes are high blood pressure, heart attacks, sleep apnea, viral infections, emphysema, and abnormal heart valves.