Statistical comparison of parameters from the patient data for each American Heart Association/American College of Cardiology heart failure stage, using 2-tailed Student's T-Test.

AHA  =  American Heart Association, ACC  =  American College of Cardiology EF  =  ejection fraction, LV  =  left ventricle, LVESV  =  left ventricular end systolic volume, LVEDV  =  left ventricular end diastolic volume, SV  =  stroke volume.
Statistical comparison of parameters from the patient data for each American Heart Association/American College of Cardiology heart failure stage, using 2-tailed Student's T-Test.

AHA = 美国心脏协会（American Heart Association），ACC = 美国心脏病学会（American College of Cardiology），EF = 射血分数（ejection fraction），LV = 左心室（left ventricle），LVESV = 左心室收缩末期容积（left ventricular end systolic volume），LVEDV = 左心室舒张末期容积（left ventricular end diastolic volume），SV = 每搏输出量（stroke volume）。针对各美国心脏协会/美国心脏病学会心衰分期的患者数据参数，采用双侧学生t检验（2-tailed Student's T-Test）进行统计学比较。