title: [Clinical profile of Chagas and non-Chagas' disease patients with cardiac pacemaker].
abstract: The aim of this study was to compare Chagas and non-Chagas' disease patients using single or dual-chamber pacemaker in relation to the ejection fraction of the left ventricle, the ventricular stimulation threshold and the occurrence of ventricular arrhythmia. From January, 2001 to November, 2002, 45 Chagas' disease patients and 35 non-Chagas' disease patients, all pacemaker users, were evaluated considering clinical history, echocardiographic study, Holter monitoring and analysis of the pacemaker telemetry data. Chagas' disease patients were significantly younger, but both groups were similar when chest X-Ray variables and right ventricular stimulation threshold were analyzed. Chagas' disease patients had a lower left ventricular ejection fraction and more frequent ventricular arrhythmia during Holter monitoring. A positive correlation between the low ejection fraction of the left ventricle and the intensity of ventricular arrhythmia was observed. In conclusion, among pacemaker user patients, Chagas' disease is related to cardiac markers of worse prognosis.
authors.affiliation: Pós-Graduação em Ciências da Saúde, Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, R. Campanha 98/101, 30310-770 Belo Horizonte, MG, Brazil.
authors.forename: Leonor Garcia
authors.initials: LG
authors.lastname: Rincon
authors.forename: Manoel Otávio da Costa
authors.initials: MO
authors.lastname: Rocha
authors.forename: Marco Túlio Baccarini
authors.initials: MT
authors.lastname: Pires
authors.forename: Bruna Guimarães
authors.initials: BG
authors.lastname: Oliveira
authors.forename: Vladimir da Costa Val
authors.initials: Vda C
authors.lastname: Barros
authors.forename: Marcio Vinicius Lins
authors.initials: MV
authors.lastname: Barros
authors.forename: Antônio Luiz Pinho
authors.initials: AL
authors.lastname: Ribeiro
mesh_terms: D000368:Aged; D002304:Cardiac Pacing, Artificial; D002598:Chagas Cardiomyopathy / Q000503:physiopathology*; D004452:Echocardiography; D015716:Electrocardiography, Ambulatory; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D017180:Tachycardia, Ventricular / Q000503:physiopathology*; D013686:Telemetry; D016277:Ventricular Function, Left / Q000502:physiology*