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Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.

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Paroxysmal AV Block Classification Based on Cause

Introduction

  • Paroxysmal AV Block may be classified according to the cause into three types :
  1. Intrinsic AV Block (I-AVB)
  2. Extrinsic Vagal AV Block (EV- AVB)
  3. Extrinsic Idiopathic AV Block (EI- AVB) “Syncope and paroxysmal atrioventricular block – Aste – 2017 – Journal of Arrhythmia – Wiley Online Library”.
 
 
 
 
 
 
 
Paroxysmal AV Block classification based on cause
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Intrinsic AV Block (I-AVB): Due to innate structural/ conduction defect
 
 
Extrinsic Vagal AV Block (EV- AVB): Due to vagal surge/reflex
 
 
 
Extrinsic Idiopathic AV Block (EI- AVB) : Due to innately low adenosine plasma levels
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Tachycardia Dependent AV Block (TD- AVB)
 
 
Bradcardia/Pause Dependent AV Block (BD- AVB/PD-AVB)
 
 
 
 
 
 

[1]

  1. ↑ Aste M, Brignole M (December 2017). “Syncope and paroxysmal atrioventricular block”. J Arrhythm. 33 (6): 562–567. doi:10.1016/j.joa.2017.03.008. PMID 29255501.