The difference between premature beats and atrial fibrillation

Premature beat refers to cardiac pacing point is not sinoatrial node, is in the heart before the normal beat, appear in advance of the beat. And atrial fibrillation refers to atrial loss of normal rhythm caused by the patient's heart rate can reach more than 300 times. It is recommended that patients had better go to the hospital for ECG examination, for patients with atrial fibrillation, need to be relieved by electrical cardioversion.