polio virus sensitivity脊髓灰质炎病毒的敏感性 paravesical space膀胱周围间隙 programmed ventricular stimulation程序性心室刺激 peritoneovenous shunting腹腔静脉分流术 pulmonary valvular stenosis肺动脉瓣狭窄 pulmonary vein stenosis肺静脉狭窄 polyvinyl sponge聚乙烯海绵 persistent vegetable state持续性植物状态 premature ventricular systole室性期前收缩