the acute effects of intravenously administered hydralazine on pulmonary hemodynamics and ejection radionuclide angiography were evaluated in 9 patients with chronic airflow obstruction ( forced expiratory volume in one second , 1.2 +/- 0.8 l , mean +/- sd ) , pulmonary hypertension ( mean pulmonary artery pressure ( pap ) , 29 +/- 13 mmhg ) , and sleep hypoxemia ( maximal sleep desaturation , 20 +/- 16 % ) .
C0020223
hydralazine
C0020542
pulmonary hypertension