In second-degree AV nodal block (a.k.a. Wenckebach block or Mobitz Type I AV block), varying failure of conduction through the AV node occurs such that some P waves may not be followed by a QRS ...
Recall that 2:1 AV block can possibly be from either second degree type I AV nodal block (Wenckebach) or second degree type II AV nodal block. This distinction is crucial since the former is ...
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