| Philips QLAB (n = 88) | TomTec 2DCPA (n = 88) | COV | ICC (p-value) | Bland-Altman (mean diff ±SD) |
---|---|---|---|---|---|
LV | |||||
 1) Pre-stretch (%) | 0.0 (0.0–0.0) | 0.0 (0.0–0.2) | 4.125 | −0.052 (0.684) | −0.1 ± 0.6 |
 2) Peak strain (%) | −7.7 ± 2.7 | −7.7 ± 3.3 | −0.350 | 0.749 (<0.001) | 0.0 ± 2.1 |
 3) Systolic strain (%) | −6.8 ± 3.0 | −7.0 ± 3.5 | −0.435 | 0.802 (<0.001) | 0.2 ± 2.0 |
 4) TTPmax (ms) | 527 (444–592) | 492 (396–559) | 0.185 | 0.376 (<0.001) | 34 ± 113 |
 5) TTPfirst (ms) | 361 (112–438) | 361 (118–413) | 0.567 | 0.165 (0.061) | 2 ± 213 |
Septum | |||||
 1) Pre-stretch (%) | 0.0 (0.0–0.0) | 0.0 (0.0–0.4) | 3.990 | −0.035 (0.627) | −0.3 ± 0.9 |
 2) Peak strain (%) | −7.6 ± 2.7 | −8.0 ± 3.7 | −0.363 | 0.626 (<0.001) | 0.5 ± 2.8 |
 3) Systolic strain (%) | −6.5 ± 3.0 | −7.0 ± 3.9 | −0.468 | 0.667 (<0.001) | 0.5 ± 2.9 |
 4) TTPmax (ms) | 541 (442–598) | 477 (346–575) | 0.202 | 0.109 (0.155) | 61 ± 179 |
 5) TTPfirst (ms) | 361 (118–426) | 161 (114–342) | 0.534 | 0.232 (0.014) | 84 ± 185 |
Lateral wall | |||||
 1) Pre-stretch (%) | 0.0 (0.0–0.1) | 0.3 (0.0–0.8) | 2.728 | 0.324 (<0.001) | −0.5 ± 1.0 |
 2) Peak strain (%) | −8.0 (−9.4 - -6.1) | −9.0 (−11.1 - -6.3) | −0.345 | 0.631 (<0.001) | 1.3 ± 3.0 |
 3) Systolic strain (%) | −6.4 (−9.0 - -5.2) | −8.0 (−11.1 - -4.9) | −0.436 | 0.680 (<0.001) | 1.5 ± 3.0 |
 4) TTPmax (ms) | 542 (454–597) | 476 (434–538) | 0.175 | 0.531 (<0.001) | 36 ± 87 |
 5) TTPfirst (ms) | 376 (107–461) | 433 (216–481) | 0.550 | 0.060 (0.290) | −41 ± 239 |
Dyssynchrony | |||||
 a) SL-delay (ms) | 0 (0–0) | −20 (−121–120) | −10.694 | 0.025 (0.409) | 24 ± 180 |
 b) SRSsept (%) | 0.7 (0.3–1.2) | 1.7 (0.6–3.3) | 1.030 | 0.419 (<0.001) | −1.5 ± 2.1 |
 c) SSI (%) | 0.8 (0.4–1.5) | 2.3 (1.1–4.2) | 1.024 | 0.421 (<0.001) | −2.0 ± 2.4 |
 d) LBBB type (n, %) |  |  |  |  |  |
  LBBB-1 | 33 (38.4%) | 33 (37.5%) |  |  |  |
  LBBB-2 | 3 (3.5%) | 11 (12.5%) |  |  |  |
  LBBB-3 | 50 (58.1%) | 44 (50.0%) |  |  |  |