In second-degree atrioventricular nodal block — also known as Wenckebach block or Mobitz Type I AV block — varying failure of conduction through the AV node occurs, such that some P waves may ...

Second-degree AV block PR increment preceding a blocked P (Wenckebach) and narrow QRS Constant PR interval preceding blocked P PR increment (Wenckebach) preceding a blocked P and wide QRS 2:1 AV ...

Third-degree heart block, also known as complete heart block, is the most serious type of atrioventricular (AV ... the least severe type of heart block. Second degree: With second-degree heart ...

In second-degree type II AV nodal block (a.k.a. Mobitz Type II AV block), the AV node becomes completely refractory to conduction on an intermittent basis. For example, three consecutive P waves ...

Methods:Of 668 consecutive patients with symptomatic type II second- or third-degree AV block, 2:1 AV block, atrial fibrillation, and bradyarrhythmia, 108 patients (62 patients enrolled ...