| Family History | |
|---|---|
| Died of cardiac disease before age 50 years | 21 (27) |
| Coronary artery disease | 18 (23) |
| Mitral valve prolapse | 12 (15) |
| Cardiac pacemaker | 12 (15) |
| Unexplained fainting | 11 (14) |
| Unexplained seizure diagnosis | 4 (5) |
| Drowning or near drowning event | 4 (5) |
| Wolff–Parkinson–White syndrome | 3 (4) |
| Implanted Cardiac defibrillator | 1 (<1) |
| Hypertrophic cardiomyopathy | 1 (<1) |
| Long QT syndrome | 1 (<1) |
| Dilated cardiomyopathy | 1 (<1) |
| Anomalous coronary artery | 1 (<1) |
| Aortic rupture/Marfan's syndrome | 1 (<1) |
| At least one of the above family history components | 32 (40) |
Values provided as n (%).