Exercise-induced improvement in atrial depolarization abnormality in a patient after treatment with beta-adrenergic blockers.

Abstract:

:Abnormal atrial depolarization, characterized by P waves >or=110 ms on the electrocardiogram, can manifest as partial or advanced interatrial conduction delay or interatrial block (IAB). Progression from partial to advanced IAB has been shown to be altered by the use of angiotensin-converting enzyme inhibitors and beta-adrenergic blockers. We previously reported that advanced IAB, denoted by biphasic P waves in leads II, II and aVF, can revert intermittently to its partial counterpart. However, potential factors that could induce such resolution remain unknown. We present the first known case of resolution of advanced IAB to partial IAB occurring during graded exercise, following treatment with a beta-adrenergic blocker. Only continued study of these and other novel factors will help us understand the exact pathophysiology of both, partial and advanced IAB.

journal_name

Cardiology

journal_title

Cardiology

authors

Ariyarajah V,Shaikh N,Spodick DH

doi

10.1159/000113425

subject

Has Abstract

pub_date

2008-01-01 00:00:00

pages

36-40

issue

1

eissn

0008-6312

issn

1421-9751

pii

000113425

journal_volume

111

pub_type

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