Regional contributions to left ventricular stroke volume determined by cardiac magnetic resonance imaging in cardiac resynchronization therapy

Table 3 Comparison of regional contributions to SV in responders and non-responders to CRT

	Responders ΔLVESV ≥ 15% (n = 37)	Non-responders ΔLVESV < 15% (n = 28)	P
LVAVPD (mm)	8.0 ± 3.1	8.8 ± 3.2	0.31
SV_long% (%)	53 ± 18	53 ± 19	0.87
SV_lat% (%)	38 ± 15	45 ± 16	0.09
SV_sept% (%)	− 1 ± 17	1 ± 11	0.65
LGE positive	23 (62%)	17 (61%)	0.91
Non-ischemic/ischemic heart disease	23 (62%)/14 (38%)	10 (36%)/18 (64%)	< 0.05
Anterioseptal to posterior mid-left ventricular delay ≥ 130 ms	15 (41%)	12 (46%)	0.66
QRS duration ≥ 150 ms	34 (92%)	23 (82%)	0.28
LBBB	34 (92%)	22 (79%)	0.16
Male/female sex	27 (73%)/10 (27%)	19 (68%)/9 (32%)	0.65

Responders vs non-responders. Response is defined as a negative change in left-ventricular end-systolic volume (ΔLVESV) of ≥ 15% by echocardiography. Values are expressed as means ± SD or absolute number and proportion in parenthesis
CRT: cardiac resynchronization therapy; LBBB: left bundle branch block; LVAVPD: left ventricular atrioventricular plane displacement; SV_long%: longitudinal contribution to SV; SV_lat%: lateral contribution to stroke volume; SV_sept%: septal contribution to stroke volume

ISSN: 1471-2261