Definition

  Sudden cardiac death (SCD) is an unexpected death due to cardiac causes occurring
within 1 hour of symptom onset.


Reference

  Circulation 2006;114;e385-e484.




In subjects without structural heart disease, the following ECG abnormalities may suggest
increased risk of sudden cardiac death
.

  Long QT interval

  Short QT interval syndrome

  Brugada syndrome (resting ECG MAY or MAY NOT be normal)

  Torsades de pointes

  Wolff-Parkinson-White (WPW) syndrome

  Cathecholaminergic polymorphic ventricular tachycardia (CPVT) (resting ECG is NORMAL)

  Andersen-Tawil Syndrome (ATS)

  Early Repolarization (ER)




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