Diagnostic and Prognostic Implications of Surface Recordings from Patients with Atrioventricular Block

Card Electrophysiol Clin. 2016 Mar;8(1):25-35. doi: 10.1016/j.ccep.2015.10.031.


The atrioventricular (AV) bridge is vulnerable to many circumstances that depress conduction. Abnormal impulse transmission may be caused by drugs, autonomic effects, or destructive processes. Type 1 (Wenckebach) AV block is owing to depressed AV nodal conduction and is recognized by a prolonging PR interval ending in a "dropped beat." Type II (Mobitz) AV block is owing to abnormal infranodal conduction, and is usually accompanied by bundle branch block. Second-degree AV block with 2:1 conduction can be a difficult problem. Third-degree (complete) AV block is a diagnosis too often rendered and too often incorrect.

Keywords: Atrioventricular block; Complete AV block; Mobitz block; Wenckebach block.

Publication types

  • Review

MeSH terms

  • Aged
  • Atrioventricular Block* / classification
  • Atrioventricular Block* / diagnosis
  • Atrioventricular Block* / physiopathology
  • Electrocardiography* / classification
  • Electrocardiography* / methods
  • Female
  • Heart Conduction System / physiopathology
  • Humans
  • Male
  • Middle Aged