The difference was not Significant in HR,mean artery pressure (MAP),LVDd,LVEF Cardjo-thoracic ratio (CTR) and 6-minute walking test (6-MWT) between two groups before treatment. (P>0.05).

• 治疗前两组心率(HR)、平均动脉压(MAP)、左室舒张末期内径(LVDd)、左室射血分数(LVEF)、心胸比例(CTR)、6分钟步行距离(6-MWT)比较差异无显著性(P>0.；05)。