Warning signs

Of note, there are many innocent explanations for the symptoms below, which do not involve heart disease or sudden death. If you or a family member does experience any of these it is recommended to discuss with your family doctor who can decide if further investigation is necessary.



  • Family history of unexplained and unexpected sudden death, especially under the age of 40
  • Family history of sudden death due a condition that may be inherited (such as cardiomyopathy- a form of heart disease)
  • Living family member diagnosed with a condition that might be inherited (such as cardiomyopathy or long QT syndrome)
  • Fainting or seizure during exercise, excitement or startle
  • Heart palpitations (especially if prolonged and/or causing dizziness or collapse)
  • Chest pain or discomfort usually brought on by relatively modest exercise, which occurs repeatedly
  • Shortness of breath during exercise