The Association of a classical left bundle Branch Block Contraction Pattern by vendor-independent strain echocardiography and outcome after cardiac resynchronization therapy

Table 2 Echocardiographic characteristics at baseline

	All	No Classical	Classical
	n = 283	n = 87	n = 196	p-value
Days from echo to CRT^a	30 (5–78)	22 (5–78)	34 (5–75)	0.89
LVEDV, mL	226 ± 83	214 ± 82	231 ± 83	0.11
LVESV, mL	180 ± 75	164 ± 67	187 ± 78	0.02
LVEF, %	21 ± 7	23 ± 7	20 ± 7	< 0.001
End-systolic GLS, %	−7.0 ± 2.9	−7.9 ± 2.6	−6.7 ± 3.0	0.001
Frame rate ≤ 30 frames/s	159 (56%)	48 (55%)	111 (57%)	0.90
< 25 frames per cardiac cycle	88 (31%)	18 (21%)	70 (36%)	0.01
Sinus rhythm on baseline echo	242 (86%)	75 (86%)	167 (85%)	0.99
Heart rate on baseline echo, min⁻¹	77 ± 16	74 ± 14	79 ± 17	0.02

^aMedian (25th–75th percentile), Wilcoxon rank-sum test used for testing differences
Echo Echocardiogram, GLS Global longitudinal strain, LVEDV Left ventricular end-diastolic volume, LVEF Left ventricular ejection fraction, LVESV Left ventricular end-systolic volume

ISSN: 1476-7120