In myocardial excitation, the delay between the excitation of the atria and ventricles is determined by the sum of atrial and atrioventricular nodal conduction. This delay, measured in milliseconds, ...

A common electrocardiogram finding that has largely been considered insignificant may actually signal an increased risk of atrial fibrillation, the future need for a permanent pacemaker and an ...

In an era where hospitals are discharging patients earlier and earlier after transcatheter aortic valve replacement, researchers are warning physicians to be cautious about the development of late ...

The ECG shows normal sinus rhythm at 75 beats per minute with a prolonged PR interval of 0.24 sec, ie, first-degree atrioventricular block. The QRS duration is about 0.16 sec with a left bundle branch ...

This tracing shows sinus rhythm at about 90 beats per minute. The PR interval is 0.24 sec, consistent with first-degree atrioventricular block. The P wave is also prolonged to greater than 0.12 sec.

Editor's note: Find the latest COVID-19 news and guidance in Medscape's Coronavirus Resource Center. College athletes who have recently recovered from COVID-19 infection show cardiac abnormalities on ...

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 ...