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目的应用超声心动图声学定量技术观察双腔起搏器患者在不同房室间期(AVI AV interval)起搏对即刻心功能EF的影响。方法应用超声心动图声学定量(acoustic quantification,AQ)技术观察9例充血性心力衰竭(CHF)患者和11例无心力衰竭患者的双腔起搏器在不同房室间期起搏对即刻左心功能EF的影响,通过评价左心功能选择最佳房室间期。结果CHF组随着AVI延长EF略呈下降趋势,最佳AVI97.22±19.54ms。无心力衰竭组随着AVI延长EF呈增加趋势;最佳AVI54.55±24.54ms;但两组患者不同AVI起搏的EF变化均无显著性差异(P>0.05)。结论超声心动图声学定量技术能够实时地评价不同AVI患者的即刻左心功能,选择最佳AVI。
Objective To evaluate the effect of pacing in patients with dual-chamber pacemaker at different AVI AV intervals on immediate cardiac function EF by echocardiography. Methods The echocardiographic acoustic quantification (AQ) technique was used to observe the effect of double chamber pacemakers in 9 patients with congestive heart failure (CHF) and 11 patients without heart failure during different interventricular septal pacing on immediate left heart The impact of functional EF, by evaluating left ventricular function to select the best AV interval. Results The EF of EF group decreased slightly with the prolongation of AVI, and the best AVI was 97.22 ± 19.54 ms. No HF group showed an increasing tendency with the prolongation of AVI. The best AVI was 54.55 ± 24.54 ms. There was no significant difference in EF between two groups in AVI pacing (P> 0.05). Conclusion Acoustic echocardiography quantitative real-time evaluation of different AVI patients with immediate left ventricular function, select the best AVI.