TABLE 2.
Schwartz Score SQTS
| Diagnostic parameters | Points |
|---|---|
| QTc, ms | |
| <370 | 1 |
| <350 | 2 |
| <330 | 3 |
| J point‐T peak interval | |
| <120 msec | 1 |
| Clinical history* | |
| History of sudden cardiac arrest | 2 |
| Documented polymorphic VT or VF | 2 |
| Unexplained syncope | 1 |
| Atrial fibrillation | 1 |
| Family history* | |
| First‐degree or second‐degree relative with high probability of SQTS | 2 |
| First‐degree or second‐degree relative with unexplained cardiac arrest | 1 |
| Sudden infant death syndrome | 1 |
| Genotype* | |
| Genotype‐positive | 2 |
| Variant of unknown significance in a culprit gene | 1 |
*
A minimum of 1 point must be obtained in the electrocardiographic section in order to obtain additional points.