【摘要】 心室按需起搏(VVI)和全自动起搏(DDD)的急性血液动力学效应显示,起搏频率达72、85次/分时,心搏量较心率过缓时明显增加,而同样频率VVI改为DDD后心搏量无显著性差异。建议国内现阶段宜首先研制和推广多功能(可程控)心室按需起搏器。更多还原

【Abstract】 In this study the acute hemodynamic consequences of ventricular demand pacing (VVI) and fully automatic pacing (DDD) were measured in 14 patients under the different pacing frequencies and A-V delays by Swan-Ganz catheter and thermodilution technique, It showed that the average cardiac index (CI) in right ventricular pacing when the frequences were lower decreased by 1.1% and the most distinct decreease being by 21.4%. in I case the CI increased markedly as pacing frequences increased. It increased by 15.0% at 72 ppm (p<0.05%)and 23.0% at 85 ppm (p<0.01), which might have important clinical value. As compared with VVI, DDD increased CI, more by 9.2% on average than that of VVI, but there was no statistical significance. The acute hemodynamic benifits of DDD varied in individual and was related to proper A-V delay. In view of the actual conditions of our country and the acute hemodynamic effects of VVI, we suggest that the manufacture and popularization of the programmable ventricular demand pacemaker (VVI) might be given the highest priority and it might be replaced by DDD, if heart failure developed. However the proper A-V delay, pacing frequence and other related parameters should be selected and adjusted according to patient’s state for better curative effects.更多还原