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本研究中采用下列5项血流动力学指数以反映左室功能:(1)左室喷血分数(EF);(2)反映左室收缩能力的左室收缩末压应力(σ_(es))/左室舒张末容量(ESVI)之比值;(3)反映前负荷的左室舒张末压应力(σ_(ed);(4)反映左室弛张特征的左室压下降的时间常数(T);(5)反映前负荷的σ_(es)。下列6项心肌组织特征按半定量法记分(0～4+):心肌纤维排列紊乱,心肌纤维肥大,肌原纤维稀少,心肌纤维胞
The following five hemodynamic indices were used in this study to reflect left ventricular function: (1) left ventricular ejection fraction (EF); (2) left ventricular end-systolic pressure (σ_ (es) ) / Left ventricular end diastolic volume (ESVI); (3) left ventricular end-diastolic pressure (σ_ (ed)) which reflects pre-load; (4) time constant of left ventricular pressure T); (5) σ_ (es), which reflects the pre-load.The following six myocardial tissue characteristics were scored according to the semi-quantitative method (0 ~ 4 +): myocardial fiber disordered, myocardial fibrosis, myofibril scar,