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

Table 5 Univariate and multivariate linear regression analysis for determinants of mitral regurgitant fraction in all DCM patients (n = 40)

	Univariable analysis			Multivariable analysis
	B	95 % CI for β	P-value	B	95 % CI for β	P-value
Age, year	−0.01	−0.20–0.18	0.90	-	-	-
Gender, male	−3.99	−10.50–2.53	0.22	-	-	-
Body mass index, kg/m²	0.22	−0.21–0.71	0.28	-	-	-
LVEDVI, mL/m²	0.05	−0.02–0.12	0.18	-	-	-
LVEF, %	−0.16	−0.40–0.07	0.17	-	-	-
LVMI, g/m²	0.06	−0.08–0.20	0.37	-	-	-
Left atrial area (4 chamber), cm²	0.56	0.23–0.91	<0.05	0.17	−1.05–1.39	0.25
Left atrial area (2 chamber), cm²	0.36	−0.16–0.89	0.17	-	-	-
Left atrial volume, cm³	0.10	0.04–0.16	<0.05	−0.01	−0.21–0.20	0.95
Mitral annulus (4 chamber), mm	0.43	−0.01–0.87	0.06	-	-	-
Tenting height, mm	2.28	1.38–3.17	<0.05	0.61	−0.37–1.59	0.21
Anterior papillary muscle maximum diameter, mm	1.28	0.34–2.23	<0.05	0.29	−0.59–1.16	0.51
Posterior papillary muscle maximum diameter, mm	1.37	0.35–2.38	<0.05	0.73	−0.23–1.68	0.13
Anterior papillary muscle shortening, %	−0.87	−1.20– −0.54	<0.05	−0.10	−0.68–0.49	0.74
Posterior papillary muscle shortening, %	−0.92	−1.24– −0.60	<0.05	−0.21	−0.75–0.32	0.42
Papillary muscle T₁ time, sec	0.16	0.12–0.21	<0.05	0.10	0.03–0.17	<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