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Variabilidade espontânea da extra-sistolia ventricular na cardiopatia chagásica crônica / Spontaneous variabitity of ventricular extrasystole in chronic Chagas cardiopathy
Grupi, César José; Sosa, Eduardo A; Carvalho, José Ferreira; Antonelli, Rita Helena; Bellotti, Giovanni; Pilleggi, Fúlvio.
  • Grupi, César José; s.af
  • Sosa, Eduardo A; s.af
  • Carvalho, José Ferreira; s.af
  • Antonelli, Rita Helena; s.af
  • Bellotti, Giovanni; s.af
  • Pilleggi, Fúlvio; s.af
Arq. bras. cardiol ; 56(6): 445-450, jun. 1991. tab
Article in Portuguese | LILACS | ID: lil-107794
ABSTRACT
Purpose - To study the spontaneous variability of single (VPCs) and coupled (CVPCs) in patients with chronic Chagas' disease (CCD). Patients and Methods - Twenty patients with CCD, 14 male, in class I and III NYHA, with frequent VPCs and VCPCs, free of drug therapy were studied.21 hour Holter monitoring was done for 4 subsequent days. The data analysis assessed the variation in the frequency of VPCs and CVPCs between patients, seven hour periods one hour periods in a hierarchical model by a Poisson process. Results - a) the frequency of VPCs follows a circadian rhythm, closely related to the hourly variations of the mean heart rate; b) disregarding the heart rate influence on the variability of the ventricular arrhythmia, its behavior was at random and unpredictable; c) the minimal percentual reduction in VPCs/h that discriminated between antiarrhythmic effect and spontaneous between antiarrhythmic effect and spontaneous variability was 121.86% for sevenhour, 58.42% for 21-hour and 38.45% for 42-hour electrocardiographic monitoring periods; d) the same approch for the VCPCs revealed values of 133,8%, 63.21% and 41.3% respectively
Subject(s)

Full text: Available Index: LILACS (Americas) Main subject: Chagas Cardiomyopathy Limits: Adult / Female / Humans / Male Language: Portuguese Journal: Arq. bras. cardiol Journal subject: Cardiology Year: 1991 Type: Article

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Full text: Available Index: LILACS (Americas) Main subject: Chagas Cardiomyopathy Limits: Adult / Female / Humans / Male Language: Portuguese Journal: Arq. bras. cardiol Journal subject: Cardiology Year: 1991 Type: Article