The changes of the right ventricular ejection fraction and harmonization of right ventricular contractionand diastole before and after sublingual adiminstration of20mg of nifedipine in 53 patients with COPD and 15cont...The changes of the right ventricular ejection fraction and harmonization of right ventricular contractionand diastole before and after sublingual adiminstration of20mg of nifedipine in 53 patients with COPD and 15control subjects was measured immediately byradionuclied blood pool imaging and comparison withthe rsults of hemodynamics at patients with corpulmonale were performed .The result showed that nifedipine can rapidly dcrease the mean pressure of the pulmonary artery andvascular resistance complicating high pressure ofpulmonary circulation, leading to the increasing of rightventricular ejection fraction , but only laeting for 10~20minutes. It can also dilate the coronary artery,improving the harmonization between right ventricularsystale and diasaole. The effective time is about30~40展开更多
文摘The changes of the right ventricular ejection fraction and harmonization of right ventricular contractionand diastole before and after sublingual adiminstration of20mg of nifedipine in 53 patients with COPD and 15control subjects was measured immediately byradionuclied blood pool imaging and comparison withthe rsults of hemodynamics at patients with corpulmonale were performed .The result showed that nifedipine can rapidly dcrease the mean pressure of the pulmonary artery andvascular resistance complicating high pressure ofpulmonary circulation, leading to the increasing of rightventricular ejection fraction , but only laeting for 10~20minutes. It can also dilate the coronary artery,improving the harmonization between right ventricularsystale and diasaole. The effective time is about30~40