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对17例安装永久性起搏器者应用脉冲多普勒记录肺动脉血流频谱,对比分析不同方式起搏器植入前后其右心功能的变化。结果显示:DDD起搏较VVI起搏的右室每搏量(SV)、心输出量(CO)增加(P<0.05、P<0.02),肺动脉峰值流速(PPFV)显著增加(P<0.01)。两组舒张早、晚期右室充盈指标均增加,DDD组舒张早期峰值流速(PFVE)显著增加(P<0.01)。表明:房室同步起搏较单纯心室起搏有更好的血液动力学效应,肺动脉血流参数可用于估价右室功能。
Pulmonary arterial blood flow was recorded by pulsed Doppler in 17 patients with permanent pacemaker. The changes of right heart function were compared before and after implantation of pacemaker. The results showed that compared with VVI pacing, the volume of right ventricular stroke volume (SV), cardiac output (CO) increased (P <0.05, P <0.02) and the peak pulmonary flow velocity (PPFV) increased remarkably (P <0.01) . The indexes of early diastolic and late right ventricular filling in both groups increased, and the peak diastolic velocity (PFVE) in DDD group increased significantly (P <0.01). Show that: atrioventricular synchronized pacing compared with simple ventricular pacing have a better hemodynamic effect, pulmonary blood flow parameters can be used to evaluate right ventricular function.