A first-degree AV block is indicated on the ECG by a prolonged PR interval. Recall that the P wave indicates atrial depolarization (initiated by firing of the SA node).

Healthcare professionals may also call this condition first-degree atrioventricular (AV) block. It is a type of arrhythmia, or abnormal heartbeat. There are three degrees of heart block — first ...

Note: A first-degree AV block is also part of a trifascicular block, as the AV node is sometimes considered the third fascicle. ECG Examples: First-Degree Atrioventricular (AV) Block ECG (Example 1) ...

The diagnosis is NSR, first-degree AV block, 3:1 AV block, Mobitz type II, and high-degree AV block. The rhythm is regular with a rate of 30 beats/min. The QRS complex duration is normal (0.08 sec ...

First-degree AV block: The electrical signal is delayed but still reaches the ventricles. Second-degree AV block: The electrical signal is partially blocked, causing occasional missed beats.

A first degree AV block is when the electrical signal is simply slowed a bit more than usual but not to the point that you end up skipping any heart beats.

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 ...