Comparison of Echocardiographic and Electrocardiographic Mapping for Cardiac Resynchronisation Therapy Optimisation

Table 2

Baseline ventricular activation times.

	LVOT VTI (cm)	VaT10-90 (ms)	TVaT (ms)
Aetiology
Ischaemic	13 ± 6	82.6 ± 5	145 ± 6
Nonischaemic	18 ± 6	77.6 ± 10	141 ± 9
QRS morphology
LBBB	14 ± 6	84 ± 22	146 ± 26
Non-LBBB	17 ± 5	71 ± 10	137 ± 9
QRS duration
120 to 150 ms	14 ± 7	67 ± 19	129 ± 30
>150 ms	16 ± 6	87 ± 19	150 ± 5

Values represent means ± SD. LBBB, left bundle branch block; LV, left ventricle; LVOT VTI, left ventricular outflow tract velocity time integral; non-LBBB, non-left bundle branch block; RV, right ventricle; TVaT, Total ventricular activation time; VaT_10-90, ventricular activation time_10-90. Values were compared by Mann–Whitney U test.