Left ventricular
short axis fractional shortening 左室短轴缩短分数
FFS= [(end-diastolic - end-systolic) /
end-diastolic] x 100 (%)
Left
ventricular M-mode ejection fraction M型左室射血分数
EF= [(end-diastolic3 - end-systolic3) /
end-diastolic3] x 100 (%)
LV mean velocity of circumferential fibre shortening 左室平均周径缩短速率
Vcf= (end-diastolic - end-systolic) / (ejection time x
end-diastolic) (circ/sec)
M-Mode
examination of the left ventricle using short axis diameters
Measurement of LV diameters (cm):
End-diastolic at Q wave of ECG
End-systolic at either:
a) end-systolic notching of IVS
b) first wide component of II heart sound (phonocardiogram)
c) maximum anterior position of posterolateral wall
Fractional shortening of LV diameters
[(end-diastolic - end-systolic) /
end-diastolic] x 100
IVS: interventricular septum 室间隔
LV: left ventricular cavity 左室容积
Phono: phonocardiographic tracing 心音淼记
PLW: postero-lateral wall 心室后侧壁
RV: right ventricular cavity 右心室容积
RVAW: RV anterior wall 右室前壁
Correct positioning of M-mode cursor in the
transthoracic parasternal long axis view to obtain the standard left
ventricular M-mode tracing as shown above.
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