Objective: to observe the improvement effects of biventricular pacing therapy in heart failure patients by clinic symptom and relative heart function parameters.
目的：评价双心室起搏对顽固性心力衰竭患者的临床症状及相关心功能指标的影响。
Objective: To assess the effect of atrial fibrillation on heart function and observe the changes of exercise parameters before and after cardioversion of atrial fibrillation.
目的探讨心房颤动对心脏功能的影响及心房颤动患者转复心律前后摄氧量等运动参数的改变。
To analyze the characters of some parameters of cardiac function and ventricular volume in chronic heart failure (CHF).
研究心力衰竭状态下，各项心功能参数与心室容积参数的变化特点。
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