Presence of contractile impairment appears crucial for structural remodeling in idiopathic left bundle-branch block

Table 3 Correlation coefficients between QRS duration and functional and structural measurements in patients with idiopathic LBBB

QRS duration (ms)	r²	r	p
LVEF (%)	0.449	− 0.670	< 0.001
Flash volume indexed (ml/m²)	0.304	0.551	< 0.001
LVEDVI (ml/m²)	0.461	0.679	< 0.001
LV mass (g)	0.527	0.726	< 0.001
RVEF (%)	0.076	− 0.275	< 0.05

LBBB left bundle-branch block, LV left ventricle, EDV end-diastolic volume, EDVI end-diastolic volume index, EF ejection fraction, RV right ventricle. r² coefficient of determination. Pearson correlation was used to calculate linear relationships between CMR and QRS duration

ISSN: 1532-429X