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 ...

This rhythm strip shows 1:1 conduction of sinus P waves with a normal PR interval at a rate of about 82 beats per minute (RR = 0.72 sec). After the fourth beat there is an isoelectric baseline with no ...

Syncope without prodrome suggests the possibility of a cardiac etiology. However, many patients with noncardiac causes of syncope will have minimal to no prodrome before the event. Thus, this is often ...

PROLONGATION of the PR interval beyond 0.20 second may occur in many disorders including acute myocardial infarction, aortic stenosis, severe aortic insufficiency, adrenal insufficiency, rheumatic ...

The U.S. Federal Aviation Administration (FAA) broadened a standard for normal heart function in pilots because medical evidence showed no symptoms or additional health risk up to the raised threshold ...