If the QRS complex is widened and downwardly deflected in lead V1, a left bundle branch block is present ... shows normal sinus rhythm, then atrial fibrillation with a rapid ventricular response ...

A left bundle branch block occurs when electrical conduction is unable to course through the left bundle and instead travels down the right bundle. The electrical impulse then reaches the left ...

The resting electrocardiogram (ECG) furnishes essential information for the diagnosis, management, and prognostic evaluation of patients with congestive heart failure (CHF). Almost any ECG ...