Healio

First Degree AV Block

A first-degree AV node block occurs when conduction through the AV node is slowed, thus delaying the time it takes for the action potential to travel from the SA node, through the AV node, and to the ...
Medscape

ECG Challenge: Tired and Out of Control

The diagnosis is normal sinus rhythm, first-degree AV block (prolonged AV conduction), premature ventricular complexes, escape junctional complex, left ventricular hypertrophy with associated ST-T ...
Medscape

What Kind of Block is This?

Figure 1 shows straightforward type I (second-degree) AV block. The QRS complexes do not occur regularly, which immediately rules out third-degree AV block, because in third-degree AV block the escape ...
Healio

Trifascicular Block

A trifascicular block is the combination of a right bundle branch block, left anterior or posterior fascicular block and a first degree AV block (prolonged PR interval). The term “trifascicular block” ...
The New England Journal of Medicine

Therapy of Atrioventricular Block

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 ...