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Selective Dysfunction of Ventricular Electrode-Endocardial Junction Following DC Cardioversion in a Patient with a Dual Chamber Pacemaker.

Authors :
Das, Gopal
Staffanson, D. B.
Source :
Pacing & Clinical Electrophysiology; Feb1997, Vol. 20 Issue 2, p364-365, 2p
Publication Year :
1997

Abstract

A patient with a dual chamber pacemaker received two transthoracic (anterior-anterior paddle position) shocks for VF. Subsequent analysis of stimulation thresholds revealed a marked rise in the ventricular threshold only. Later, she received three additional shocks (anterior-posterior paddle position) during electrophysiological study to terminate episodes of induced VT. Following these, the ventricular stimulation threshold was > 10 Vat 2.0 ms. The selective damage at the ventricular site in this patient led us to carry out in vitro studies that revealed a preferential shunting of high electrical energy into the ventricular lead, as compared to the atrial lead, following a DC shock. These observations may explain the selective pacing malfunction observed in our patient. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
01478389
Volume :
20
Issue :
2
Database :
Complementary Index
Journal :
Pacing & Clinical Electrophysiology
Publication Type :
Academic Journal
Accession number :
17425619
Full Text :
https://doi.org/10.1111/j.1540-8159.1997.tb06184.x