Relation of Mitral Annulus and Left Atrial Dysfunction to the Severity of Functional Mitral Regurgitation in Patients with Dilated Cardiomyopathy

Table 4

Fractional changes of the mitral annulus parameters during the cardiac systole.

	Functional mitral regurgitation	Control subjects
	(N = 56)	(N = 52)
MA area fraction (%)	14.6 ± 5.0	27.6 ± 4.6	<0.001
AP diameter change (%)	10 ± 6	19 ± 7	<0.001
ALPM diameter change (%)	7 ± 4	12 ± 4	<0.001
MA displacement (mm)	4.8 ± 2.9	10.2 ± 1.7	<0.001
Displacement velocity (mm/sec)	30 ± 13	50 ± 9	<0.001

AP: anteroposterior; ALPM: anterolateral-posteromedial; MA: mitral annulus.