心脏再同步治疗(cardiac resynchronization therapy,CRT)已成为治疗心功能不全患者的行之有效的方法之一,房室延迟(atrioventricular delay,AVD)、室间延biventricular delay,VVD)和室内延迟(intraventricular delay,IVD)作为与之相关的三个重要间期,越来越受到人们的重视。本文将从如何获得最佳的房室间期、各种间期对心功能的可能影响机制及其如何影响心功能三个方面做一简单综述。 Cardiac resynchronization therapy (CRT) has become one of the most effective methods for the treatment of patients with cardiac insufficiency. Atrioventricular delay (AVD), intraventricular biventricular delay (VVD) and intraventricular delay, IVD) as the three important inter-related period, more and more people’s attention. This article will give a brief review on how to get the best atrioventricular period, the possible influence mechanism of various intervals on heart function and how it affects the cardiac function.