目的:　　旨在探讨心脏磁共振(Cardiac magnetic resonance，CMR)心肌应变(Myocardial strain，MS)用于无创性评估单支冠状动脉慢性完......

目的：应用二维斑点追踪技术(two-dimensional speckle tracking imaging，2D-STI)评估左室射血分数(left ventricular ejection fract......