Disturbances and/or symptoms suggestive of arrhythmias | Syncope, lipothymia, dizziness, palpitations |
| |
Family history | Sudden death |
| Ventricular fibrillation |
| Sustained VT |
| Pacemaker implant |
| |
Non-invasive findings suggestive of intra- or infrahissian AV conduction disturbances (with or without symptoms) | LBBB |
| RBBB + LAFH |
| RBBB + LPFH |
| |
| First degree AV block with: |
| PR interval >240 ms |
| LAFH |
| LPFH |
| |
| Second or third degree AV block |
| |
| Signal averaged ECG positive for late potentials |
| |
Sinus node dysfunction (with or without symptoms) | Sinus pause >3 seconds |
| Sinus bradycardia <40/min |
| |
Ventricular arrhythmias (with or without symptoms) | Frequent ventricular premature beats |
| Non-sustained VT |
| Sustained VT |