The diagnosis is normal sinus rhythm, atrial bigeminy, first-degree atrioventricular (AV) block (prolonged AV conduction), and right bundle branch block (RBBB). The rhythm is slightly irregular, with ...

Impulses, or electrical signals, travel through both the left and right chambers of your heart to make it pump. But if the pathway is blocked, the impulses may move slower than normal or irregularly.

A right bundle branch block (RBBB) involves a delay in the electrical impulses reaching the heart’s right ventricle, which can affect the heart’s ability to pump blood effectively. While RBBB doesn’t ...

There are regular P waves at a rate of 60 beats per minute. The QRS complexes show “grouped beating.” Three of the first four P waves are conducted with increasing PR intervals; the first beat is ...

Atrial fibrillation with a slow ventricular response Right bundle branch block Prolonged QT interval (with normal QTc interval) The QRS complex is irregular and coarse "fibrillatory waves" are present ...

A man in his mid-70s with a history of peripheral arterial disease, but no known heart disease, presents to the emergency department (ED) with 1 to 2 hours of nonradiating, slightly pleuritic, ...