Table 2 Assessment of electrocardiographic parameters
LMT, n = 39 | pLAD, n = 224 | dLAD, n = 172 | P value | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Normal n = 17 | RBBB n = 17 | LBBB n = 5 | Normal n = 180 | RBBB n = 40 | LBBB n = 4 | Normal n = 159 | RBBB n = 3 | LBBB n = 10 | Normal | RBBB | LBBB | |
Heart rate, bpm | 93 (79, 128) | 86 (72, 97.5) | 76 (57.5, 119.5) | 78 (65, 90.8) | 87 (73.3, 113) | 130.5 (84.8, 147.8) | 77 (66, 93) | 73 (69, 96) | 81 (66.3, 97) | 0.0092 | 0.5230 | 0.1628 |
QRS duration, ms | 110 (95, 116) | 156 (141.5, 162) | 174 (160, 175) | 96 (86.5, 106) | 149 (131, 158) | 162 (140, 208) | 92 (87, 102) | 134 (128, 146) | 142 (135, 177.5) | 0.0031 | 0.1933 | 0.2797 |
QRS axis | 13 (−46.5, 60) | 46 (−69, 63.5) | −16 (−48, 32) | 43.5 (6.9, 68) | 19.5 (−57.8, 70.8) | −54 (−78.5, 5.8) | 33 (−9, 61) | - 47 (−52, 73) | −56.5 (−66, −44.5) | 0.0369 | 0.6900 | 0.1473 |
LAHB, n | 4 (23.5%) | 9 (52.9%) | NA | 10 (5.6%) | 17 (42.5%) | NA | 9 (5.7%) | 2 (66.7%) | NA | 0.0135 | 0.5975 | NA |
QT interval, ms | 386 (366, 407) | 428 (411, 446) | 466 (417, 472) | 395 (368, 415.5) | 414 (382.5, 450.5) | 403 (386.5, 484) | 398 (368, 420) | 438 (364, 458) | 428 (408, 482.5) | 0.7386 | 0.6695 | 0.6059 |
QTc, ms | ||||||||||||
Bazett | 481.2 (443.5, 560.1) | 507.8 (482.9, 531.3) | 524.6 (459.9, 587.7) | 446.0 (424.7, 464.1) | 503.0 (460.7, 541.1) | 579.7 (565.8, 620.7) | 449.9 (429.9, 477.7) | 483.1 (460.4, 491.0) | 507.8 (482.7, 565.8) | 0.0021 | 0.5043 | 0.1755 |
Fridericia | 450.1 (437.7, 496.3) | 477.1 (457.1, 498.1) | 504.3 (463.2, 524.2) | 425.3 (410.5, 445.1) | 473.0 (445.9, 499.8) | 527.2 (508.6, 543.7) | 431.9 (416.0, 448.4) | 467.6 (425.7, 479.8) | 477.9 (441.6, 535.6) | 0.0041 | 0.6980 | 0.1600 |