Quick Arrhythmia Guide
First Degree Heart Block
Rhythm | Regular |
Rate | The underlying rate |
P Wave | Normal |
PR Interval | Prolonged (>0.20 sec) |
QRS | Normal (0.06-0.10 sec) |
Notes | A first degree AV block occurs when electrical impulses moving through the Atrioventricular (AV) node are delayed (but not blocked). First degree indicates slowed conduction without missed beats. |
First Degree Heart Block EKG Reference Arrhythmia Guide
Arrhythmia Guide