[Chronotropic and pressoric response in myocardiopathy in patients with heart failure during ergometric test. Correlation of spirometry variables with effort].
OBJECTIVE
To correlate the variables heart rate (HR), blood pressure (BP) and double product (DP) during the ergometric test with the variables oxygen consumption (VO2) and pulmonary ventilation (VE) of spiroergometry.


METHODS
A study was carried out with 40 male patients suffering from cardiomyopathy with heart failure (functional class II-IV of NYHA)-of ischemic (IS), Chagas' disease (CH) and idiopathic (ID) etiology. These three groups were compared to a group of 10 normal individuals (N). The 4 groups were evaluated under 4 different conditions: rest (RES), anaerobic threshold (LA), power peak of exercise (P) and in the fourth minute recovery (REC). The investigation was carried out with the data obtained through spiroergometry (using a treadmill and spiroergometric equipment specific for the effort), as well as data related to HR, BP, DP, VO2 and VE.


RESULTS
There were significant differences observed in the ergometric evaluate of the HR, BP and DP responses in the IS, CH and ID groups as compared with the N group. There were significant difference observed in the spirometric evaluation to the VO2 and VE efforts in the IS, CH and ID groups as compared with the N group.


CONCLUSIONS
The HR, BP and DP variables studies, obtained by means of classic ergometry, unaided by direct methodology (spiroergometry) enabled them to infer valuable data for the control and evaluation of cardiomyopathies with IC, taking into consideration the low chronotropic and pressoric responses in the various phases of evaluation during this study, corresponding to the concomitant low performance of O2 consumption and pulmonary ventilation.
Yazbek Júnior
P
P
Instituto do Coração, Hospital das Clínicas, FMUSP.
Santomauro
A C
AC
Silva
P R
PR
Trombetta
I C
IC
Dourado
M P
MP
Diament
J
J
Kedor
H
H
Wajngarten
M
M
Battistella
L R
LR
Azul
L G
LG
D000328:Adult; D000368:Aged; D001794:Blood Pressure / Q000502:physiology; D002303:Cardiac Output, Low / Q000503:physiopathology*; D009202:Cardiomyopathies / Q000503:physiopathology*; D005080:Exercise Test; D005652:Functional Residual Capacity / Q000502:physiology; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption / Q000502:physiology; D013147:Spirometry
Resposta cronotrópica e pressórica nas miocardiopatias em portadores de insuficiência cardíaca durante prova ergométrica. Correlação das variáveis espirométricas ao esforço.