关键词: Valsalva手法;体位;自主神经系统;心率;血压

    摘 要:目的 比较不同体位下进行Valsalva动作时，心血管响应型式的差别. 方法 在-15°头低位倾斜、水平仰卧和+75°头高位倾斜三种体位下，分别进行4kPa/30s的Valsal-va动作，并记录逐跳心率及动脉血压变化. 结果 +75°头高位倾斜体位下，心率在Ⅱ相的增高幅度最大;在Ⅲ相时呈降低变化，而在另外两种体位下则呈升高变化.血压在Ⅱ相前期的降低幅度以在-15°头低位倾斜体位下为最小，在+75°头高位倾斜体位下为最大.+75°头高位倾斜体位下血压在Ⅲ相呈升高反应，而在-15°头低位倾斜和水平仰卧体位下血压呈典型降低变化.体位改变对Valsalva动作II相心率、血压响应模式的影响最大. 结论 体位改变可引起中心血量重新分配及自主神经均衡性改变，故对Valsalva动作时心率和血压的响应模式产生影响.

    Posture shift alters pattern of heart rate and blood pressure response during valsalva maneuver

    CHENG Jiu-Hua ，WANG Shou-Yan ，ZHANG Hai-Ning ，JIAO Fu-Bing ，ZHANG Li-Fan

    1 Department of Aerospace Physiology，Faculty of Aerospace Medicine，2 Students of95Grade，Fourth Military Medical University，Xi'an710033，China

    Keywords:valsalva's maneuver;posture;autonomic nervous system;heart rate;blood pressure

    Abstract:AIM To examine the influence of posture shift on the pattern of heart rate and blood pressure response to Val┐salva.METHODS Thirty seconds Valsalva maneuver strains at4kPa were performed under-15°head-down tilt，supine or+75°head-up tilt posture ......