Atrial Septal Defect

Abstract
Atrial septal defects account for 7 to 10 percent of all congenital cardiac malformations and for almost one third of cases of congenital heart disease among adults.1 In 1953 it became the first intracardiac defect to be corrected successfully with cardiopulmonary bypass. The study by Murphy and coworkers in this issue of the Journal 2 now makes available detailed long-term follow-up of patients treated with surgery for this disorder between 1956 and 1961.Atrial septal defects are classified according to their location in the septum.1 , 3 The most common type is the ostium secundum defect, which accounts for more than 70 percent . . .

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