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目的:比较在对有与无左室(LV)功能障碍的窄QRS波患者行右室(RV)、LV和双心室(BiV)起搏时的LV收缩和舒张功能。背景:具有心室起搏标准指征患者
PURPOSE: To compare LV contractility and diastolic function during right ventricular (RV), LV and biventricular (BiV) pacing in patients with narrow QRS waves with or without left ventricular (LV) dysfunction. Background: Patients with standard indications of ventricular pacing