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Fig. 2 | Cardiovascular Ultrasound

Fig. 2

From: Speckle tracking echocardiography analyses of myocardial contraction efficiency predict response for cardiac resynchronization therapy

Fig. 2

Comparison of contraction timing indexes. a Comparison among control group, baseline non-responder group and responder group. (Compared to Control Group: *p < 0.05; **p < 0.005; ***p < 0.0005; Compared to baseline Non-responder Group #p < 0.05; ##p < 0.005; ###p < 0.0005). b Comparison between baseline and 6-month follow-up in both patient groups. (Comparison between pre-CRT and post-CRT in Non-responder Group: ¥p < 0.05; Comparison between pre-CRT and post-CRT in Responder Group: &p < 0.05;) ECT: effective contraction time; TCT: total contraction time; ECTR: effective contraction time ratio

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