Electrocardiographic changes seen in conditions causing sudden death in young athletes
| Diagnosis | ECG changes | |
|---|---|---|
| QTc, QT interval corrected for heart rate. | ||
| HCM | 1 | Pathological Q waves |
| 2 | ST segment flattening, depression, or both | |
| 3 | Pronounced (>0.2 mV) T wave inversion | |
| 4 | Left axis deviation | |
| ARVC | 1 | T wave inversion in anterior precordial leads |
| 2 | Ventricular extrasystoles with left bundle branch block morphology | |
| 3 | QS complexes in leads V1–3 | |
| 4 | QRS prolongation (<110 ms) in V1–3 | |
| 5 | Epsilon waves | |
| WPW | 1 | Short PR interval |
| 2 | Delta wave | |
| Long QT syndrome | 1 | Prolonged QT and QTc intervals |
| 2 | U waves | |
| 3 | Repolarisation abnormalities | |
| Brugada syndrome | 1 | Right bundle branch block and ST elevation in anterior precordial leads |