TABLE 1.
Baseline characteristics.
| All | ILR | Smartphone ECG | p | |
| N = 116 | N = 23 | N = 93 | ||
| Age, years | 42 | 44 | 42 | 0.573 |
| Male, N (%) | 51 (44) | 17 (74) | 34 (37) | 0.001 |
| Severity of CHD | ||||
| Mild, N (%) | 25 (22) | 3 (23) | 22 (24) | 0. 020 |
| Moderate, N (%) | 45 (39) | 5 (22) | 40 (93) | |
| Severe, N (%) | 46 (39) | 15 (65) | 31 (33) | |
| Medical history | ||||
| Cardiac surgery, N (%) | 92 (79) | 17 (74) | 75 (81) | 0.475 |
| Non-cardiac surgery, N (%) | 54 (47) | 5 (22) | 49 (53) | 0.007 |
| Coronary artery disease, N (%) | 7 (6) | 2 (9) | 5 (5) | 0.559 |
| Arrhythmia, N (%) | 91 (78) | 10 (43) | 81 (87) | < 0.01 |
| Heart failure, N (%) | 22 (19) | 3 (13) | 19 (20) | 0.418 |
| Hypertension, N (%) | 16 (14) | 1 (4) | 15 (16) | 0.142 |
| Systemic EF < 40%, N (%) | 6 (5) | 0 | 6 (6) | 0.208 |
| Subpulmonic EF < 40%, N (%) | 4 (3) | 1 (4) | 3 (3) | 0.399 |
| NYHA class | ||||
| I, N (%) | 90 (78) | 16 (70) | 74 (80) | 0.303 |
| ≥ 2, N (%) | 26 (22) | 7 (30) | 19 (20) | |
| Arrhythmia symptoms, N (%) | 95 (82) | 19 (83) | 76 (82) | 0.921 |
| Palpitations, N (%) | 78 (67) | 8 (35) | 70 (75) | < 0.01 |
| Dyspnea, N (%) | 12 (10) | 2 (9) | 10 (11) | 0.772 |
| (Near) syncope, N (%) | 18 (16) | 15 (65) | 3 (3) | < 0.01 |
| Medication | ||||
| Antiarrhythmic agents, N (%) | 52 (45) | 7 (30) | 45 (48) | 0.121 |
| Diuretics, N (%) | 13 (11) | 3 (13) | 10 (11) | 0.701 |
| Anticoagulation, N (%) | 45 (39) | 7 (30) | 38 (41) | 0.358 |
N, number; EF, ejection fraction; ILR, implantable loop recorder; CHD, congenital heart disease; NYHA, New York heart association. Bold values represent the significant values.