SciELO - Scientific Electronic Library Online

vol.30 issue2Tratamento da forma mucosa de leishmaniose sem resposta a glucantime, com anfotericina B liposomalEstudo comparativo controlado com emprego de benznidazole, nifurtimox e placebo, na forma crônica da doença de Chagas, em uma área de campo com transmissão interrompida. I. Avaliação preliminar author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Revista da Sociedade Brasileira de Medicina Tropical

Print version ISSN 0037-8682On-line version ISSN 1678-9849


PEDROSA, Roberto Coury; MELO, Marcos F. Vidal  and  SAAD, Edson A.. Limiar anaeróbio detectado pela "análise da curva-V" na cardiopatia chagásica crônica. Rev. Soc. Bras. Med. Trop. [online]. 1997, vol.30, n.2, pp.129-138. ISSN 0037-8682.

Anaerobic threshold (AT) as measured by V-slope, is the best parameter of cardiac reserve in patients with heart failure. A reduction of AT reflects linearly a limited cardiopulmonary reserve in patients with heart disease. We measured the anaerobic threshold from 28 patients (18 men; age 47 ± 6,7 years) classified into four groups: IA (normal ECG, wihout heart disease; 9 patients); IB (normal ECG, early left ventricular segmental abnormalities; 5 patients); II (abnormal ECG, advanced myocardial damage, no signs of heart failure; 7 patients); and III (abnormal ECG, end-stage, congestive heart failure; 7 patients). The analysis of variance indicated that the anaerobic threshold from patients of group IA was significantly greater than in groups IB, II and III (p = 0,001). Tukeys multiple comparation test showed no significative differences between mean AT in groups IB, II and III. The present study clearly demonstrates that occurrence of initial left ventricular contraction abnormalities is associated with definite reduction of cardiopulmonary reserve, and that this reduction is progressive and paralels the hemodynamic alterations. The most probable cause of this finding in group IB is dyastolic dysfunction as clearly showin in echocardiogram.

Keywords : Chronic chagasic cardiopathy; Anaerobic threshold; Test cardiopulmonary; V-slope analysis; Chagas disease.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License