Table 1. Baseline Characteristics.
| Characteristics | Total (%) |
|---|---|
| Number of patients | 570 (100) |
| Men | 297 (52) |
| Age years (IQR) | 68.5 (53 - 81) |
| Previous syncope | 130 (23) |
| Prodromal symptoms | 249 (44) |
| Comorbidities | |
| Ischemic heart disease | 126 (22) |
| Peripheral vascular disease | 78 (14) |
| Previous myocardial infarction | 87 (15) |
| Systemic hypertension | 288 (51) |
| Previous or current atrial fibrillation | 77 (14) |
| Other arrhythmias | 37 (6) |
| Previous stroke | 72 (13) |
| Congestive heart failure | 61 (11) |
| Previous or ongoing cancer | 49 (9) |
| Chronic obstructive pulmonary disorder | 46 (8) |
| Diabetes | 56 (10) |
| Cardiac pacemaker or ICD unit | 21 (4) |
| Epilepsy | 7 (1) |
| Alcoholism | 18 (3) |
| Dementia | 29 (5) |
| Depression | 25 (4) |
| Previous PCI or CABG | 61 (11) |
| Previous or current smoker | 223 (39) |
| Alcohol intake above recommended level | 124 (22) |
| Pharmacotherapy | |
| Beta blockers | 140 (25) |
| ACEi/ARB | 210 (37) |
| Digoxin | 21 (4) |
| Nitrates | 34 (6) |
| Calcium channel blockers | 85 (15) |
| Spironolactone | 21 (4) |
| Thiazide | 111 (19) |
| Loop diuretics | 85 (15) |
| Class Ic antiarrhythmic drugs | 1 (0) |
| Class III antiarrhythmic drugs | 13 (2) |
| Anxiolytics | 56 (10) |
| Antipsychotics | 27 (5) |
| Antidepressants | 76 (13) |
| Glucose lowering drugs | 51 (9) |
Age is given in median and interquartile range (IQR). ACEi: angiotensin converting enzyme inhibitor; ARB: angiotensin receptor blocker; PCI: percutaneous coronary intervention; CABG: coronary artery bypass graft.