Table 1

Criteria for major or minor errors

Definition Criteria
Minor errorFirst degree heart block, ectopic beats, sinus tachycardia <120 beats/min, sinus bradycardia >40 beats/min, non-specific T wave changes, ventricular hypertrophy, left or right axis deviation, right bundle branch block, Q waves
Major errorST segment depression or elevation >1 mm, widespread/deep T wave changes, sinus tachycardia >120 beats/min, sinus bradycardia <40 beats/min, atrial fibrillation, narrow or broad complex tachycardias, second or third degree heart block