肺血管是压力反射效应器的一部分，立位应激时的压力反射很大程度上控制着肺循环的阻力和容量。
Pulmonary vascular is an effector of baroreceptor reflex, which can exert significant control of pulmonary resistance and capacitance after orthostatic challenge.
肺心病基本病理生理改变特点是肺血管痉挛、肺循环阻力增高，以及红细胞增多、血液黏稠度增加、血小板聚集等。
The physiopathology characteristic of pulmonary heart disease is that the vessels of the lungs are tic, resistance of pulmonary circulation is increased, the blood platelet is gathered, et al.
在注入NOS抑制剂后总肺循环阻力、肺动脉阻力、体循环血管阻力均明显上升（P< 0 .0 5 ）。
Total pulmonary resistance(TPR), pulmonary vascular resistance(PVR)and systemic vascular resistance(SVR) were increased after injected NOS inhibitor(P<0.05).
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