II. Epidemiology

  1. Incidence: 10% of Congenital Heart Defects
  2. Females more affected than males by a ratio of 2:1

III. Pathophysiology

  1. One of three types of Atrial Septal Defect
  2. Congenital defect at the fossa ovalis

IV. Symptoms

V. Signs

  1. Accentuation of right ventricular precordial thrust
  2. Systolic ejection murmur in 2nd, 3rd left interspaces
  3. Wide splitting of P2
  4. Short Diastolic Murmur along left sternal border

VI. Radiology: Chest XRay

  1. Cardiomegaly

VII. Diagnostics: Electrocardiogram (EKG)

  1. Right Axis Deviation
  2. Late R-prime in right-sided leads

VIII. References

  1. Saenz (1999) Am Fam Physician 59(7):1857-66 [PubMed]
  2. Cyran (1998) PREP review lecture, October, Phoenix
  3. Merenstein (1994) Pediatrics, Lange

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