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• W4313443541 abstract "Functional mitral regurgitation (FMR) is a frequent condition in the setting of dilated cardiomyopathy (DCM) and its physiopathological mechanisms are complex. The aim of this study was to determine the influence of left ventricular remodeling and mechanical dyssynchrony on the occurrence of FMR in non-ischemic DCM. Prospective study involving 52 patients (mean age = 57 ± 10 years, sex-ratio = 1.8) with non-ischemic DCM. Two groups were compared: the group with FMR (group MR+ = 31 patients) and that without FMR (group MR− = 21 patients). Mean QRS duration was 141 ± 29 ms, 63% of patients had complete left bundle branch block (LBBB), with no significant difference between the 2 groups. Echocardiographic parameters representing left ventricular systolic function were similar in 2 groups except for cardiac output which was lower in the group MR+ (3,3 ± 1l/min vs. 4 ± 1.3l/min P = 0.02). For mitral deformation indices, tenting area (3,6 ± 1 cm2 vs 2,5 ± 0.8 cm2; P = 0.005) and tenting height (1.5 ± 0.3 cm vs. 1 ± 0.2 cm; P < 0.001) were significantly larger in group MR+. For dyssynchrony indices, only temporal longitudinal dyssynchrony was associated to FMR (P = 0.04). In the group MR+, more criteria of intraventricular dyssynchrony were noted (3.4 ± 1.4) than in group MR− (2.4 ± 1.4; P = 0.01). FMR severity was well correlated to tenting area (r = 0.66; P < 0.001) and tenting height (r = 0.67; P < 0.01). However, parameters representing left ventricular systolic and diastolic function were not good determinants of FMR severity and dyssynchrony indices were not at all associated to FMR severity. This study showed that only the mitral deformation indices were well correlated to both the presence and the severity of FMR. Left ventricular remodeling indices were not good determinants of FMT. However, the intraventricular dyssynchrony indices were associated to the presence of FMR and not to its severity." @default.
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• W4313443541 date "2023-01-01" @default.
• W4313443541 modified "2023-09-26" @default.
• W4313443541 title "Functional mitral regurgitation determinants in dilated cardiomyopathy" @default.
• W4313443541 doi "https://doi.org/10.1016/j.acvdsp.2022.10.103" @default.
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