ECG in Congenital Heart Disease

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Secundum atrial septal defect

Rhythm: normal sinus rhythm, increased risk of AF with age

PR interval: first degree AV block in 6-19%

QRS axis: 0° to 180°; RAD; LAHB

Atrial enlargement: rSr' or rsR' with more often incomplete RBBBi than complete RBBB

Ventricular hypertrophy:

Particularities