The relation between mitral annulus motion and ejection fraction: a nonlinear function.
In previous studies of the relation between mitral annulus motion (MAM) and left ventricular ejection fraction (EF), a linear relationship has been suggested. In this meta-analysis of 434 patients, we show that the relation is nonlinear and that a linear regression model overestimates EF in the lower range of MAM. The relation is better described by an S function and is influenced by age and heart size.
Emilsson
K
K
Department of Clinical Physiology, Orebro Medical Center Hospital, Sweden. kent.emilsson@orebroll.se
Alam
M
M
Wandt
B
B
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017023:Coronary Angiography; D006801:Humans; D016014:Linear Models; D008875:Middle Aged; D008943:Mitral Valve / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D011875:Radionuclide Angiography; D013318:Stroke Volume; D014463:Ultrasonography