4BELARDINELLI R,GEORGIOU D,CIANCI G,et al.Randomized controlled trial of long-term moderate exercise training in chronic heart failure:effect on functional capacity ,quality of life,and clinical outcome[J].Circulation,1999,99(9):1173-1182.
5BITTER V,WEINER DH,YUSUF S,et al.Prediction of mortality and morbidity with a 6 minute walk test in patient with left ventricular dysfunction[J].JAMA,1993,270:1702-1707.
