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Table 1 Baseline characteristics

From: Comparison of strain parameters in dyssynchronous heart failure between speckle tracking echocardiography vendor systems

  GE-cohort (n = 123) Philips-cohort (n = 88) p-value
Age (years) 68.3 (61.3–73.4) 67.2 (59.0–73.9) 0.450
Gender (n, % male) 82 (66.7%) 53 (60.2%) 0.384
BMI (kg/m2) 26.5 (23.8–29.6) 26.2 (23.6–29.3) 0.813
NYHA Class (n, %)
 I 1 (0.8%) 0 (0.0%) 0.869
 II 77 (62.6%) 53 (60.2%)
 III 45 (36.6%) 35 (39.8%)
QRS duration (ms) 177 (160–192) 179 (166–193) 0.293
QRS morphology (n, %)
 LBBB 68 (56.7%) 55 (64.7%) 0.311
 IVCD 52 (43.3%) 30 (35.3%)
LVEDV (ml) 183.3 (148.8–247.7) 168.0 (132.0–211.8) 0.051
LVESV (ml) 135.3 (100.7–194.7) 130.3 (92.8–167.3) 0.087
LVEF (%) 25.6 ± 7.3 26.5 ± 7.9 0.406
LVEDD (cm) 6.3 ± 0.8 6.2 ± 0.8 0.591
IVMD (ms) 47.1 ± 28.8 46.3 ± 30.2 0.855
Apical rocking (n, %) 71 (58.2%) 56 (63.6%) 0.476
Septal flash (n, %) 56 (47.5%) 42 (48.8%) 0.888
Frame rate (Hz) 61 ± 12 55 ± 7 <.001
Image quality (n, %)
 Poor 31 (25.2%) 8 (9.1%) 0.011
 Average 54 (43.9%) 50 (56.8%)
 High 38 (31.0%) 30 (34.1%)
ESV reduction 20.4 ± 22.9 24.9 ± 25.7 0.208
Responders (n, %) 65 (58.6%) 54 (65.1%) 0.375
  1. Standard deviations are given with ± symbol, for non-normal distributed data, the median is given with the interquartile range between brackets
  2. BMI body mass index, NYHA New York Heart Association, LBBB left bundle branch block, LV left ventricular, LVEDV LV end-diastolic volume, LVESV LV end-systolic volume, LVEF LV ejection fraction, LVEDD LV end-diastolic diameter, IVCD intra-ventricular conduction delay, IVMD interventricular mechanical delay