| GE EchoPac (n = 123) | TomTec 2DCPA (n = 123) | COV | ICC (p-value) | Bland-Altman (mean diff ±SD) |
---|---|---|---|---|---|
LV | |||||
 1) Pre-stretch (%) | 0.4 (0.0–1.4) | 0.7 (0.1–1.7) | 1.218 | 0.631 (<0.001) | −0.3 ± 1.0 |
 2) Peak strain (%) | −7.3 ± 3.1 | −6.4 ± 2.8 | −0.424 | 0.723 (<0.001) | −0.8 ± 2.2 |
 3) Systolic strain (%) | −6.4 ± 3.2 | −5.6 ± 3.2 | −0.504 | 0.752 (<0.001) | −0.8 ± 2.2 |
 4) TTPmax (ms) | 511 (426–587) | 488 (429–593) | 0.201 | 0.676 (<0.001) | −2 ± 86 |
 5) TTPfirst (ms) | 400 (158–458) | 421 (316–471) | 0.480 | 0.195 (0.015) | −34 ± 205 |
Septum | |||||
 1) Pre-stretch (%) | 0.3 (0.0–1.0) | 0.7 (0.0–1.5) | 1.337 | 0.470 (<0.001) | −0.4 ± 1.1 |
 2) Peak strain (%) | −8.0 ± 3.1 | −7.2 ± 3.2 | −0.392 | 0.707 (<0.001) | −0.8 ± 2.4 |
 3) Systolic strain (%) | −6.7 ± 3.5 | −6.0 ± 3.5 | −0.517 | 0.667 (<0.001) | −0.7 ± 2.8 |
 4) TTPmax (ms) | 531 (378–626) | 520 (414–606) | 0.336 | 0.261 (0.002) | −9 ± 189 |
 5) TTPfirst (ms) | 208 (135–376) | 311 (151–420) | 0.521 | 0.486 (<0.001) | −39 ± 142 |
Lateral wall | |||||
 1) Pre-stretch (%) | 1.6 (0.5–3.1) | 1.2 (0.2–2.4) | 0.951 | 0.524 (<0.001) | 0.3 ± 1.9 |
 2) Peak strain (%) | −8.5 (−11.4- -5.8) | −6.5 (−10.2- -4.3) | −0.462 | 0.595 (<0.001) | −1.4 ± 3.6 |
 3) Systolic strain (%) | −6.6 (−10.8- -4.2) | −5.5 (−9.0- -3.0) | −0.532 | 0.565 (<0.001) | −1.2 ± 3.7 |
 4) TTPmax (ms) | 500 (456–541) | 514 (445–556) | 0.149 | 0.444 (<0.001) | −7 ± 101 |
 5) TTPfirst (ms) | 475 (419–520) | 431 (300–522) | 0.302 | 0.136 (0.066) | 47 ± 206 |
Dyssynchrony | |||||
 a) SL-delay (ms) | 25 (−132–110) | −13 (−121–101) | −14.440 | 0.078 (0.194) | −2 ± 226 |
 b) SRSsept (%) | 1.7 (0.8–3.4) | 1.1 (0.1–1.9) | 0.937 | 0.470 (<0.001) | 1.0 ± 2.0 |
 c) SSI (%) | 3.8 (2.1–5.9) | 2.6 (1.3–3.8) | 0.720 | 0.467 (<0.001) | 1.3 ± 3.0 |
 d) LBBB type (n, %) | |||||
  LBBB-1 | 46 (37.4%) | 36 (29.3%) |  |  |  |
  LBBB-2 | 17 (13.8%) | 10 (8.1%) |  |  |  |
  LBBB-3 | 60 (48.8%) | 77 (62.6%) |  |  |  |