Atrial fibrillation is very serious.

Atrial fibrillation (AF)

is a common arrhythmia that causes mural thrombosis in the left atrial appendage. If the thrombus in the left atrial appendage falls off, it may cause cerebral vascular occlusion, leading to ischemic stroke. In addition, patients with persistent AF and low heart rate may also cause systolic and diastolic dysfunction, blood stasis in the venous system, resulting in insufficient perfusion of the arterial system, and may also cause heart failure.