应用泵血参数评价起搏器起搏效应的初步探讨

Evaluating the pacemaker effect with the pump parameter of gated blood-pool imaging

对１３例正常人，２７例心室起搏器（其中１４例ＶＶＩ型，１３例ＶＶＩＲ型）患者进行门控心血池显像。结果表明：应用泵血参数能较好地反映起搏器的治疗效果．心室射血功率（ＥＭＰ）与心室每搏量和心室前后负荷均呈明显相关；安装心室起搏器后，左室ＥＦ没有明显提高，但ＣＯ、ＥＭＰ明显改善；在应激状态下ＶＶＩＲ的起搏效应明显优于ＶＶＩ型起搏器；应用起搏器体外抑制的方法，可保持同一条件下用门控心血池显像观察安装起搏器后患者的起搏与非起搏时心功能的变化，并能够监测安装起搏器后一定时期心脏自身功能状态．

normal controls and 27 patients with ventricular pacemaker had undergone planar gated blood-pool imaging in different conditions. Result shows: (1) Pump parameters can successfully reflect theraupeutic effect of pacemaker among them EMP is the most valuable parameter for evaluating the cardiac pumping effect. (2)After implantation of the ventricular pacemaker, the LVEF didn't increase, but the CO and EMP was significantly increased.(3)Compared with right ventricular demand pacemaker, the rate-responsive ventricular pacemaker give better hemodynamic benifit at exercise condition.(4)Through restrained cardiac pacemaker the functional change was analyzed on or off pace,and monitoring the cardiac function itself after the pacemaker was implanted.