Table 1.

Common ECG abnormalities classified as non-clinically relevant (minor abnormalities) and pathological ECG patterns potentially indicative of heart disease (major abnormalities)

Minor abnormalities	Major abnormalities
Sinus bradycardia	II and III degree atrio-ventricular block
First-degree atrio-ventricular block	Left anterior fascicle block
Incomplete RBBB	Left posterior fascicle block
Unspecific repolarization anomalies (early repolarization or juvenile T-wave pattern)	Ventricular pre-excitation
Supraventricular and ventricular premature beats	Complete LBBB or RBBB
Heterotopic atrial rhythm	Long QTc
Junctional rhythm

ECG, electrocardiographic; LBBB, left bundle branch block; QTc, QT interval corrected for heart rate; RBBB, right bundle branch block.