Reverse remodeling of left atrium assessed by cardiovascular magnetic resonance feature tracking in hypertrophic obstructive cardiomyopathy after septal myectomy

Table 4 Univariate and multivariate analysis showing potential factors associated with the rate of change of εa

Variables	Univariate		Multivariate
Variables	r	P	Adjusted β	P
Age at surgery (year)	− 0.03	0.79
Male	0.14	0.19
Duration from myectomy to latest follow-up CMR (month)	0.05	0.68
History of atrial fibrillation	− 0.10	0.37
Preoperative beta-blockers	0.06	0.61
Preoperative calcium channel blockers	− 0.11	0.31
Postoperative beta-blockers	− 0.12	0.26
Postoperative calcium channel blockers	0.07	0.54
Systolic blood pressure (mmHg)	0.24	0.02	0.18	0.06
Diastolic blood pressure (mmHg)	0.06	0.58
Mitral valve repair	− 0.14	0.20
Mitral E/A ratio < 1	− 0.05	0.62
Maximal LV wall thickness (mm)	0.13	0.22
LV mass index (g/m²)	0.01	0.91
Late gadolinium enhancement of LV (%)	0.08	0.46
LAV_min index (ml/m²)	− 0.47	< 0.001	− 0.39	< 0.001
ΔMitral regurgitation degree	− 0.29	0.006	− 0.05	0.66
ΔLV outflow tract gradient (mmHg)	− 0.35	0.001	− 0.29	0.003
ΔStroke volume (ml)	− 0.19	0.082

Delta value (Δ) = preoperative value − postoperative value, rate of change = delta value (Δ)/preoperative value × 100%
LV left ventricular, LAV left atrial volume

ISSN: 1532-429X