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Why does A Fib occur?


Dr. Su
Dr. Wilber Su, FACC, is a cardiologist and cardiac electrophysiologist at Banner Good Samaritan Medical Center.

Question:  Why does A Fib occur?

Answer: In summary, it is not clear. There is not one single cause. In some cases, one may attribute the cause of atrial fibrillation to abnormal heart valve or enlarged chamber.

Known significant cause are high blood pressure, congestive heart failure, heart valve problems, and obstructive sleep apnea. Half of the time, there are no identifiable causes for atrial fibrillation.

Initial evaluation will generally include a electrocardiogram, chest X-ray, ultrasound exam of the heart (echocardiogram). Patients may also undergo CT scan and a Holter monitor to record heart electrical activity over a 24-hour period.

What are the risks of untreated A Fib?

Page Last Modified: 02/22/2010
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