title: [Ergospirometry as a method for predicting the clinical course of ischemic, Chagas and idiopathic myocardiopathy].
abstract: OBJECTIVE
  To compare and evaluate the modifications variables obtained through spyroergometry in groups of patients with ischemic cardiomyopathy (IS), Chagas' disease (CH), and idiopathic cardiomyopathy (ID). To study tolerance to anaerobic conditions of patients from the above groups who died.
  
  
  METHODS
  A study was carried with 50 male patients, 10 of which were found in normal conditions whereas 40 presented cardiomyopathy with compensated heart failure. We observed that from the 40 patients from the cardiomyopathy groups, nine died, subgroups OB--during the study period of 1.005 days. These were compared to subgroups NOB--the remaining 31 patients. These patients were evaluated under 4 conditions--Rest (Rep), anaerobic threshold (LA), power peak of the exercise (P) and in the fourth minute recovery (REC). The investigation was based on data collected by means of spyroergometry: oxygen consumption (MET), production of CO2-(VCO2), respiratory equivalent of oxygen (VE/VO2), oxygen pulse (VO2/FC) and the time elapsed between LA and P.
  
  
  RESULTS
  There were significant differences when the three pathological groups (IS, CH, ID) were compared with the control groups (N). There were no significant differences when the three pathological groups compared among themselves. In relation to tolerance to anaerobic conditions significant differences were found among the patients of subgroup OB--1.33 min--who died when compared to subgroup NOB--3.26 min (time elapsed between LA and P).
  
  
  CONCLUSIONS
  The authors conclude that the variables studied, obtained through spyroergometry may indicate important data towards the prognosis with heart failure.
authors.affiliation: Instituto do Coração do Hospital das Clínicas, FMUSP, São Paulo.
authors.forename: P
authors.initials: P
authors.lastname: Yazbek Júnior
authors.forename: J
authors.initials: J
authors.lastname: Diament
authors.forename: H
authors.initials: H
authors.lastname: Haebisch
authors.forename: H H
authors.initials: HH
authors.lastname: Kedor
authors.forename: C
authors.initials: C
authors.lastname: Mady
authors.forename: A
authors.initials: A
authors.lastname: Romano
authors.forename: J A
authors.initials: JA
authors.lastname: Ramires
authors.forename: G
authors.initials: G
authors.lastname: Bellotti
authors.forename: L G
authors.initials: LG
authors.lastname: Serro-Azul
authors.forename: F
authors.initials: F
authors.lastname: Pileggi
mesh_terms: D000328:Adult; D000368:Aged; D009202:Cardiomyopathies / Q000209:etiology / Q000503:physiopathology*; D002598:Chagas Cardiomyopathy / Q000503:physiopathology; D005080:Exercise Test; D005652:Functional Residual Capacity; D006801:Humans; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption; D013147:Spirometry
vernacular_title: Ergoespirometria como método de predição do comportamento evolutivo da miocardiopatia isquêmica, chagásica e idiopática.