Paroxysmal AV block classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Akash Daswaney, M.B.B.S[2]

Overview

Based on the cause, paroxysmal AV block maybe classified into Intrinsic paroxysmal AV Block, Extrinsic Vagal paroxysmal AV block and Extrinsic Idiopathic paroxysmal AV Block.

Classification

• 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)

References

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