1 1 ejection fraction EF 1 stroke volume SV left ventricular end-diastolic volume LVEDV SV LVEDV left ventricular end-systolic volume LVESV EF EF LVEDV�LVESV LVEDV 100 M 2 D M end-diastolic dimension: LVDd end-systolic dimension: LVDs Teichholz V 70 24�D D 3 asynergy Jpn J Med Ultrasonics Vol33 No3 2006 371 2 D single plane area-length modified Simpson single plane area-length A L D 4A � L V � 6 D