QRS alternans with 2:1 atrioventricular conduction block: What is the mechanism?

Takumi Yamada; Paul B. Tabereaux; H. Thomas McElderry; G. Neal Kay

doi:10.1111/j.1542-474X.2008.00237.x

QRS alternans with 2:1 atrioventricular conduction block: What is the mechanism?

Takumi Yamada, Paul B. Tabereaux, H. Thomas McElderry, G. Neal Kay

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

An 81-year-old woman was admitted for symptomatic bradycardia. On admission, the ECG exhibited QRS alternans, narrow QRS complex and left bundle branch block with 2:1 AV block. The patient soon had complete AV block and underwent a pacemaker implantation. An appropriate mechanism for explaining those ECG findings might be 4:1 conduction over the left bundle branch and 2:1 conduction over the right bundle branch. An ECG pattern exhibiting QRS alternans with a narrow QRS complex and bundle branch block with 2:1 AV block may suggest the coexistence of both bundle branch blocks and a high risk of complete AV block.

Original language	English (US)
Pages (from-to)	314-316
Number of pages	3
Journal	Annals of Noninvasive Electrocardiology
Volume	13
Issue number	3
DOIs	https://doi.org/10.1111/j.1542-474X.2008.00237.x
State	Published - Jul 2008
Externally published	Yes

Keywords

Atrioventricular conduction block
Bundle branch block
QRS alternans

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title = "QRS alternans with 2:1 atrioventricular conduction block: What is the mechanism?",

abstract = "An 81-year-old woman was admitted for symptomatic bradycardia. On admission, the ECG exhibited QRS alternans, narrow QRS complex and left bundle branch block with 2:1 AV block. The patient soon had complete AV block and underwent a pacemaker implantation. An appropriate mechanism for explaining those ECG findings might be 4:1 conduction over the left bundle branch and 2:1 conduction over the right bundle branch. An ECG pattern exhibiting QRS alternans with a narrow QRS complex and bundle branch block with 2:1 AV block may suggest the coexistence of both bundle branch blocks and a high risk of complete AV block.",

keywords = "Atrioventricular conduction block, Bundle branch block, QRS alternans",

author = "Takumi Yamada and Tabereaux, {Paul B.} and McElderry, {H. Thomas} and Kay, {G. Neal}",

year = "2008",

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AU - Yamada, Takumi

AU - Tabereaux, Paul B.

AU - McElderry, H. Thomas

AU - Kay, G. Neal

PY - 2008/7

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AB - An 81-year-old woman was admitted for symptomatic bradycardia. On admission, the ECG exhibited QRS alternans, narrow QRS complex and left bundle branch block with 2:1 AV block. The patient soon had complete AV block and underwent a pacemaker implantation. An appropriate mechanism for explaining those ECG findings might be 4:1 conduction over the left bundle branch and 2:1 conduction over the right bundle branch. An ECG pattern exhibiting QRS alternans with a narrow QRS complex and bundle branch block with 2:1 AV block may suggest the coexistence of both bundle branch blocks and a high risk of complete AV block.

KW - Atrioventricular conduction block

KW - Bundle branch block

KW - QRS alternans

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QRS alternans with 2:1 atrioventricular conduction block: What is the mechanism?

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