S: (1) Acute hypoxia caused an increase in left and right ventricular myocardial blood flow,myocardial NO - 2,ET-1 contents,NOS activity,but CVR in the left and right ventricle were decreased compared with the control group.

• 急性低氧导致双心室心肌血流量、心肌NO-2 、ET - 1含量、NOS活性明显增高 ,CVR明显下降。