Relationship between native papillary muscle T1 time and severity of functional mitral regurgitation in patients with non-ischemic dilated cardiomyopathy

Table 6 Univariate and multivariate linear regression analysis for determinants of mitral regurgitant fraction in DCM patients with MR (n = 22)

	Univariable analysis			Multivariable analysis
	B	95 % CI for β	P-value	B	95 % CI for β	P-value
Age, year	0.08	−0.11–0.26	0.41	-	-	-
Gender, male	−0.49	−6.85–5.86	0.87	-	-	-
Body mass index, kg/m²	0.17	−0.29–0.64	0.44	-	-	-
LVEDVI, mL/m²	0.05	−0.02–0.11	0.17	-	-	-
LVEF, %	−0.17	−0.40–0.05	0.12	-	-	-
LVMI, g/m²	0.06	−0.06–0.20	0.28	-	-	-
Left atrial area (4 chamber), cm²	0.34	0.01–0.68	<0.05	0.13	−0.24–0.30	0.85
Left atrial area (2 chamber), cm²	0.14	−0.21–0.49	0.42	-	-	-
Left atrial volume, cm³	0.05	−0.01–0.11	0.08
Mitral annulus (4 chamber), mm	−0.05	−0.50–0.41	0.83	-	-	-
Tenting height, mm	1.46	−1.09–4.01	0.24	-	-	-
Anterior papillary muscle maximum diameter, mm	0.64	−0.22–1.51	0.14	-	-	-
Posterior papillary muscle maximum diameter, mm	0.93	0.05–1.82	<0.05	1.32	0.50–2.16	<0.05
Anterior papillary muscle shortening, %	0.31	−1.12– −0.21	0.17	-	-	-
Posterior papillary muscle shortening, %	−0.51	−0.97– −0.05	<0.05	−0.17	−0.58–0.23	0.41
Papillary muscle T₁ time, sec	0.11	0.02–0.20	<0.05	0.11	0.03–0.20	<0.05

Variables with p value < 0.05 in univariate analysis were included in multivariable analysis
CI confidence interval, DCM dilated cardiomyopathy, LVEDVI left ventricular end-diastolic volume index, LVEF left ventricular ejection fraction, LVMI left ventricular mass index, MR mitral regurgitation

ISSN: 1532-429X