Unusual ventricular activation produced by temporary transvenous cardiac pacing: electrovectorcardiographic findings

Abstract Complete heart block (CHB) results from dysfunction of the cardiac conduction system, which results in complete electrical dissociation. The ventricular escape rhythm can have its origin anywhere from the atrioventricular node to the bundle branch-Purkinje system. CHB typically results in bradycardia, hypotension, fatigue, hemodynamic instability, syncope, or even Stokes-Adams syndrome. Escape rhythm originating above the bifurcation of the His bundle (HB) produces narrow QRSs with relatively rapid heart rate (HR) (except in cases of His system disease). We present a middle-aged man with an HR of 34 bpm, progressive fatigue, in whom a temporary pacemaker was implanted in the subtricuspid region. The post-intervention electrocardiogram had unusual features.

Bibliographic Details

Main Authors:	Pérez-Riera,Andrés R., Barbosa-Barros,Raimundo, Baueb-Soler,Fábio, Daminello-Raimundo,Rodrigo, Abreu,Luiz C. de, Nikus,Kjell
Format:	Digital revista
Language:	English
Published:	Instituto Nacional de Cardiología Ignacio Chávez 2020
Online Access:	http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-99402020000100012
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