BACKGROUND: In most echocardiographic studies concerning mitral annulus motion (MAM) in the assessment of left ventricular (LV) systolic function, comparisons have been performed between MAM, which represents a distance, and ejection fraction (EF), which represents a ratio between volumes. However, in theory, it is probably more suitable to compare the long-axis fractional shortening (FS(L)) (the ratio between the change in length [ie, MAM] and the end-diastolic length of the left ventricle) with EF. OBJECTIVES: To compare EF with MAM and EF with FS(L) in the assessment of LV systolic function. METHODS: Thirty healthy subjects were investigated using echo-cardiography, and the linear correlations between EF and MAM, and EF and FS(L) were calculated. RESULTS: The linear correlation (r) was found to be higher between EF and FS(L) (r=0.65; P<0.001) than between EF and MAM (r=0.49; P<0.01). CONCLUSIONS: The higher correlation between EF and FS(L) than between EF and MAM suggests that FS(L), which includes a correction for ventricular length, may be a more suitable index of LV systolic function than MAM per se.
BACKGROUND: In most echocardiographic studies concerning mitral annulus motion (MAM) in the assessment of left ventricular (LV) systolic function, comparisons have been performed between MAM, which represents a distance, and ejection fraction (EF), which represents a ratio between volumes. However, in theory, it is probably more suitable to compare the long-axis fractional shortening (FS(L)) (the ratio between the change in length [ie, MAM] and the end-diastolic length of the left ventricle) with EF. OBJECTIVES: To compare EF with MAM and EF with FS(L) in the assessment of LV systolic function. METHODS: Thirty healthy subjects were investigated using echo-cardiography, and the linear correlations between EF and MAM, and EF and FS(L) were calculated. RESULTS: The linear correlation (r) was found to be higher between EF and FS(L) (r=0.65; P<0.001) than between EF and MAM (r=0.49; P<0.01). CONCLUSIONS: The higher correlation between EF and FS(L) than between EF and MAM suggests that FS(L), which includes a correction for ventricular length, may be a more suitable index of LV systolic function than MAM per se.
Entities:
Keywords:
Echocardiography; Left ventricular ejection fraction; Left ventricular function; Systolic function
Authors: N B Schiller; P M Shah; M Crawford; A DeMaria; R Devereux; H Feigenbaum; H Gutgesell; N Reichek; D Sahn; I Schnittger Journal: J Am Soc Echocardiogr Date: 1989 Sep-Oct Impact factor: 5.251
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