Paroxysmal AV Block aka Ventricular Standstill

 • Abrupt and persistent AV block ( multiple P waves with no QRS) in the presence of otherwise normal AV conduction.

 • May be initiated by a conducted or blocked PAC or PVC, acceleration or slowing of sinus rhythm.

 • Once the block is initiated, the block will persist until terminated by an escape, usually ventricular, with a predictable relationship of the escape to the following P wave.



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