Table 1
Demographic characteristics of patients with different causes of syncope
| Cause of syncope | n (%) |
|---|---|
| Group 1a: Neurally mediated syncope | |
| Vasovagal syncope | 247 (47.4%) |
| Situational neurally mediated syncope | 19 (3.6%) |
| Carotid sinus hypersensitivity | 13 (2.5%) |
| Group 1b: Chronic autonomic failure | |
| Definite/severe dysautonomia (orthostatic hypotension) | 19 (3.6%) |
| Initial dysautonomia (parasympathetic) | 7 (1.3%) |
| Group 2a: Non-neurogenic orthostatic hypotension | |
| Iatrogenic causes | 4 (0.8%) |
| Volume depletion | 2 (0.4%) |
| Group 2b: Cardiogenic syncope | |
| Paroxysmal atrial fibrillation | 4 (0.7%) |
| Ventricular arrhythmia | 5 (0.9%) |
| Sick sinus syndrome | 3 (0.5%) |
| Aortic valve disease | 1 (0.1) |
| Group 3: Non-syncopal origin | |
| Psychogenic conditions | 15 (2.9%) |
| Hyperventilation | 16 (3.1%) |
| Others | 14 (2.9%) |
