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
Particularities