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; LAD in Holt-Oram or LAHB
QRS Configuration: rSr´ or rsR´ with RBBBi>RBBBc
Atrial Enlargement: RAE 35%
Ventricular hypertrophy: Uncommon
Particularities: "Crochetage" pattern

Ventricular Septal Defect

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