Objective: To observe regional systolic and diastolic function of left ventricular myocardium in dilated cardiomyopathy patients with narrow QRS wave by quantitative tissue velocity imaging (QTVI) .
目的：超声评价窄QRS波的扩张型心肌病患者左室局部心肌的收缩和舒张功能。
Objective: To observe regional systolic and diastolic function of left ventricular myocardium in dilated cardiomyopathy patients with narrow QRS wave by quantitative tissue velocity imaging (QTVI) .
目的：超声评价窄QRS波的扩张型心肌病患者左室局部心肌的收缩和舒张功能。
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