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Ventilatory function and pulmonary hemodynamics changes were comparatively studied on 52 cases of congenital and acquired heart diseases associated with pulmonary hypertention before and 6 months to 4 years after operation, on 32 cases which has been practiced postoperative examinations. Pulmonary hypertension was applied over 30mmHg of mean pulmonary artery pressure. The following results were obtained. 1) Ventilatory disturbances were noted in almost cases with over 50mmHg mean pulmonary artery pressure., in cases with over 0.45 in Pp/Ps and 2.0 in Qp/Qs, in isolated ASD and VSD, in cases with over 450dyne/sec/cm-5 in PVR and below 0.84 in Qp/Q5, in mitral and aortic vulve diseases. 2) It was showed tendency to increase ventilatory disturbance in patients with over 30 years old and to decrease % MBC and FEV 1.0% in patiants with over 50 years old after operation. 3) It needs a careful consideration to have operations in following cases with below 45% in % MBC, over 42% in % RV and in cases of valvular diseases which show over 560dyne/sec/ cm-5 in PVR, below 0.84 in Qp/Qs.

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Relationship between ventilatory function and pulmonary hemodynamics about congenital and acquired heart diseases associated with pulmonary hypertension