Comparison of Echocardiographic and Electrocardiographic Mapping for Cardiac Resynchronisation Therapy Optimisation

Table 1

Patient characteristics.

Patient characteristics	Value (%)
Age (y)	69 ± 12
Sex
Male	17 (81)
Female	4 (19)
Sinus rhythm	14 (67)
Atrial fibrillation	7 (33)
Aetiology
Ischaemic	13 (62)
Nonischaemic	8 (38)
LV ejection fraction (%)	27 ± 10
QRS duration (ms)	162 ± 21
120–150 ms	6 (29)
>150 ms	15 (71)
QRS morphology
LBBB	15 (71)
Non-LBBB	6 (29)

Values represent means ± SD, with percentages in parentheses where relevant. LBBB, left bundle branch block; LV, left ventricle; non-LBBB, non-left bundle branch block; RV, right ventricle.