Fig. 4
From: Index of contractile asymmetry improves patient selection for CRT: a proof-of-concept study
CRT response by ICA in each LV sector. Left upper panel: Baseline ICA in CRT responders vs. non-responders. Right upper panel: Reduction of ICA4 as a function of baseline ICA4. Left lower panel: Reduction of ICA after CRT stratified by the severity of the baseline ICA4. Right lower panel: Reduction of ICA after CRT in the subgroup of patients with a low baseline contractile asymmetry (ICA4 < 0.7 s− 1). ICA, index of contractile asymmetry; ICA4, index of contractile asymmetry in LV sector 4; CRT, cardiac resynchronization therapy; LV, left ventricle; r, Pearson’s r; *, p < 0.05