Clinical details and outcome for 10 children with long QT syndrome having water-triggered cardiac events
| Subject | Age at first symptom (years) | Age at water-related event (years) | Age at diagnosis (years) | Event presentation | Resuscitation | QTc (ms) | Outcome |
|---|---|---|---|---|---|---|---|
| 1 | 12 | 12 | 12 | Underwater syncope at private pool | No | 560 | Good |
| 2 | 7 | 7 | 14 | Underwater syncope during swimming race | No | 482 | Good |
| 3 | 13 | 13 | 13 | Syncope plus seizure after swimming in lake | No | 700 | Good (one episode of TdP on ICD) |
| 4 | 13 | 13 | 13 | Underwater syncope during swimming race | No | 520 | Good |
| 5 | 8 | 10 | 8 | Underwater syncope during swimming race | No | 520 | Good |
| 6 | 11 | 11 | 11 | Underwater syncope, near drowning | No | 460 | Good (Paroxysmal AF) |
| 7 | 8 | 8 | 8 | Near drowning, VT arrest in private pool | Yes CPR and DCC | 570 | Spastic quadriplegic |
| 8 | 7 | 10 | Posthumous | Syncope after swimming underwater | No | Later died during hockey warm up | |
| 9 | 5 | 5 and 36 | 22 | Underwater syncope plus collapse at hot pools | No | 570 | Good (TdP on ICD) |
| 10 | 3 | 3 | 4 | Slipped through a flotation ring | No | 590 | Good |
AF, atrial fibrillation; CPR, Cardiopulmonary resuscitation; DCC, direct current cardioversion; ICD, intracardiac defibrillator; QTc, maximal heart rate corrected QT interval (see text); TdP, torsade de pointes.