[Pulmonary hemodynamics during mild exercise in COPD].
The effects of mild exercise on pulmonary hemodynamics and ventilatory responses in COPD were studied. Six patients with FEV1% less than 70% received 20 watt exercise tests by cycle ergometers for 5 minutes. Changes in hemodynamics and ventilation were observed before and during exercise. Nine patients with an FEV1% of more than 70% also received exercise tests as controls. There were no different in changes in respiratory frequency, tidal volume and minute ventilation between control and COPD group. However, the mean pulmonary arterial pressure were higher in the COPD group than in the control group before exercise. Moreover increments of mean pulmonary arterial pressure by exercise were also greater in COPD group. It was concluded that hemodynamics in COPD are much more influenced by mild exercise than in healthy subjects.
Sagara
Y
Y
Kubo
H
H
Ashino
Y
Y
Sazuki
S
S
Chida
M
M
Isogami
K
K
Nasu
G
G
Saito
H
H
Ono
S
S
Sakuma
T
T
D000328:Adult; D000368:Aged; D015444:Exercise; D005080:Exercise Test; D005260:Female; D006439:Hemodynamics; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011652:Pulmonary Circulation; D012119:Respiration