P waves will not be seen on the ECG in patients with atrial fibrillation. At times, the P wave activity may be observed as “coarse fibrillatory waves,” and the term “coarse atrial ...

This ECG shows atrial fibrillation with an uncontrolled ventricular rate. There are two QRS complexes that become wide in a right bundle branch block pattern. This can occur at fast heart rates ...

left or RBBB, abnormal R wave progression, left anterior fascicular block and atrial fibrillation. Several common heritable cardiomyopathies including HCM, ARVC and familial dilated cardiomyopathy may ...

In the remaining studies, widened QRS complexes were most commonly attributed to RBBB or an unspecific ... (most commonly nonsustained SVT, atrial fibrillation and sinus bradycardia).

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