Why an ECG?

Dr. Cadigan's thoughts on screening:

ECG screenings may detect conditions including, but not limited to:

  • Supraventricular Arrhythmias
  • Ventricular Arrhythmias
  • AV Block
  • Bundle Branch Block and other types of conduction delay
  • Prolonged QT Syndrome
  • Brugada Syndrome
  • Wolff-Parkinson-White Syndrome
  • Hypertrophic Cardiomyopathy


  • Dilated Cardiomyopathy
  • Infiltrative Cardiomyopathies (i.e. Sarcoidosis)
  • Idiopathic Left Ventricular Hypertrophy/Fibrosis
  • Valvular Heart Disease
  • Congenital Heart Disease (i.e. Atrial Septal Defect)
  • Myocardial Ischemia and Infarction
  • Electrolyte Imbalance (Potassium, Calcium)
  • Myocarditis
  • Pericarditis
  • Lyme Cardiac Disease
  • Undiagnosed Hypertension

An ECG, while an excellent screening tool, is not perfect and may miss some cardiac conditions

There are other cardiac conditions that can cause sudden cardiac death in which the ECG would not be likely to help in making the diagnosis.  Some of these conditions include, but are not limited to:

  • Congenital Anomalous Coronary Artery or other Coronary anomalies
  • Aortic Aneurysm
  • Commotio Cordis
  • Acquired conditions that may develop at a date subsequent to the screening ECG
  • Catecholaminergic Polymorphic Ventricular Tachycardia

Electrocardiography (ECG/EKG) - Basics