Objective: To investigate the change of TDI parameters after right ventricular pacing, and to reveal the effects of VVI and DDD on myocardial contractile function.是什么意思_Objective: To investigate the change of TDI parameters after right ventricular pacing, and to reveal the effects of VVI and DDD on myocardial contractile function.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句