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Table 1 Baseline characteristics

From: The Association of a classical left bundle Branch Block Contraction Pattern by vendor-independent strain echocardiography and outcome after cardiac resynchronization therapy

  All No Classical Classical  
n = 283 n = 87 n = 196 p-value
Age, years 66 ± 11 67 ± 9 65 ± 12 0.13
Women 113 (40%) 20 (23%) 93 (47%) < 0.001
Days from ECG to CRTa 6 (2–25) 7 (3–24) 6 (1–24) 0.89
Ischemic heart disease 136 (48%) 55 (63%) 81 (41%) < 0.001
NYHA class III/IV 230 (81%) 74 (85%) 156 (80%) 0.32
QRS duration, ms 157 ± 21 146 ± 17 162 ± 21 < 0.001
QRS duration < 150 ms 110 (39%) 53 (61%) 57 (29%) < 0.001
Strict LBBB 226 (80%) 55 (63%) 171 (87%) < 0.001
1st degree AV block 51 (18%) 16 (18%) 35 (18%) 0.99
Atrial fibrillation/flutter 82 (29%) 30 (34%) 52 (27%) 0.20
Hypertension 195 (69%) 67 (77%) 128 (65%) 0.05
Diabetes 90 (32%) 40 (46%) 50 (26%) < 0.001
Creatinine, mg/dL+ 1.2 (1.0–1.5) 1.3 (1.0–1.6) 1.1 (0.9–1.5) 0.01
ACE/ARB 230 (81%) 68 (78%) 162 (83%) 0.32
Betablocker 257 (91%) 79 (91%) 178 (91%) 0.82
  1. aMedian (25th–75th percentile), Wilcoxon rank-sum test used for testing differences
  2. ACE Angiotensin converting enzyme inhibitor, ARB Angiotensin II-receptor blocker, AV Atrioventricular, CRT Cardiac resynchronization therapy, ECG Electrocardiogram; LBBB Left bundle branch block, NYHA New York Heart Association