2nd Degree AV Block, Type I, with Junctional Escapes

Frank Yanowitz Copyright 1996

Junctional escapes are passive, protective events whenever the heart rate slows below that of the escape mechanism. In this example of 2nd degree AV block, type I, the escapes occur following the non-conducted P waves. Arrows indicate the position of the P waves. Note that the escape beats have a slightly different QRS morphology than the conducted sinus beats.