Circadian pattern of ventricular tachycardia episodes in patients with Chagas heart disease.
Chronic Chagas' cardiomyopathy (CCM) causes ventricular arrhythmias and sudden death, and constitutes the most frequent cause of death in many endemic areas. The circadian variation in the incidence of ventricular arrhythmias and sudden death differs according to the substrate (e.g., morning and evening peaks in ischemic heart disease and non-Chagasic dilated cardiomyopathy). Third generation implantable cardioverter defibrillators (ICDs) have the ability to store the time and date of each ventricular tachycardia (VT) episode, enabling the patterns of ventricular tachyarrhythmia occurrence to be analyzed. The aim of our study was to evaluate the circadian variation of spontaneous VT in recipients of an ICD with CCM.
de Freitas
Silvia Nascimento
SN
Section of Electrophysiology, Division of Cardiology, Argerich Hospital, Buenos Aires, Argentina.
Caiaffa
Waleska Teixeira
WT
César
Cibele Comini
CC
Faria
Valéria Andrade
VA
do Nascimento
Raimundo Marques
RM
Coelho
George Luiz Lins Machado
GL
Abello
Mauricio
M
González-Zuelgaray
Jorge
J
Daglio
Maria E
ME
Lopez
Carlos
C
Garraza
Sebastián
S
Szyszko
Ariel
A
D002598:Chagas Cardiomyopathy / Q000150:complications / Q000503:physiopathology*; D002908:Chronic Disease; D002940:Circadian Rhythm; D015331:Cohort Studies; D017147:Defibrillators, Implantable; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D017180:Tachycardia, Ventricular / Q000209:etiology / Q000503:physiopathology* / Q000628:therapy