Table 5.
Baseline characteristics of the CardioBBEAT study participants - Diagnostic
| Characteristic | All patients n = 621 | Usual care n = 319 (51 %) | Monitoring n = 302 (49 %) | p value |
|---|---|---|---|---|
| ECG | ||||
| Heart rate (1/min) – number of patients (% valid) | 616 (99) | 315 (99) | 301 (100) | |
| mean ± SD | 72 ± 14 | 72 ± 14 | 72 ± 13 | 0.862 |
| median (IQR) | 71 (63–81) | 71 (63–82) | 71 (62–80) | |
| Heart rhythm – number/total number (%) | 0.031 | |||
| Sinus rhythm | 379/619 (61) | 185/318 (58) | 194/301 (65) | |
| Atrial fibrillation | 78/619 (13) | 46/318 (15) | 32/301 (11) | |
| Pacemaker ECG | 154/619 (25) | 86/318 (27) | 68/301 (23) | |
| Other | 8/619 (1) | 1/318 (0) | 7/301 (2) | |
| Conduction disorder – number/total number (%) | ||||
| LBBB | 145/543 (27) | 69/272 (25) | 76/271 (28) | 0.543 |
| RBBB | 49/544 (9) | 28/273 (10) | 21/271 (8) | 0.383 |
| QRS duration (ms) – number of patients (% valid) | 568 (92) | 288 (90) | 280 (93) | |
| mean ± SD | 123 ± 33 | 125 ± 34 | 121 ± 32 | 0.151 |
| median (IQR) | 110 (100–144) | 116 (100–150) | 110 (100–140) | |
| 2D echocardiography | ||||
| LVEDD (mm) – number of patients (% valid) | 584 (94) | 297 (93) | 287 (95) | |
| mean (mm) ± SD | 62 ± 9 | 62 ± 9 | 63 ± 9 | 0.580 |
| median (IQR) | 62 (57–68) | 62 (57–68) | 62 (57–68) | |
| LVEF (%) – number of patients (% valid) | 619 (100) | 317 (100) | 302 (100) | |
| mean ± SD | 30 ± 7 | 31 ± 7 | 30 ± 8 | 0.580 |
| median (IQR) | 31 (25–37) | 31 (25–37) | 30 (25–36) | |
| Mitral insufficiency – number/total number (%) | 0.319 | |||
| none | 102/614 (17) | 55/315 (18) | 47/299 (16) | |
| mild | 370/614 (60) | 180/315 (57) | 190/299 (64) | |
| moderate | 121/614 (20) | 70/315 (22) | 51/299 (17) | |
| severe | 21/614 (3) | 10/315 (3) | 11/299 (4) | |
| 6-minute walk test – number of patients (% valid) | 559 (90) | 284 (89) | 275 (91) | |
| mean (m) ± SD | 375 ± 132 | 376 ± 132 | 374 ± 131 | 0.804 |
| median (IQR) | 400 (300–458) | 404 (300–455) | 400 (300–460) |
2D two-dimensional, ECG electrocardiogram, IQR interquartile range, LBBB left bundle branch block,LVEDD left ventricular end-diastolic dimension, LVEF left ventricular ejection fraction, QRS combination of three of the graphical deflections seen on a typical ECG, RBBB right bundle branch block