Objective:This study is to evaluate whether the baseline plasma renin activity(PRA)could be used as an important index to assess the severity of chronic heart failure.Method:Seventy consecutive patients with chronic systolic left ventricular dysfunction[ejection fraction<40%,mean age(61.36±11.48)years]were recruited.The heart functions were graded intoⅡ-Ⅳlevels according to the standard of New York Heart Disease Academy(NYHA).The NYHA classification,left ventricular ejection fraction(LVEF),left ventricular ...