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[Surgical treatment of interatrial septal defect].

On the basis of the authors' experience acquired between 1956 and 1973 (a total of 401 cases with inter-atrial communications and 234 cases of ostium secundum that have been operated by them), data are presented concerning the diagnostic means, the indications and the contra-indications of the surgical treatment, as well as the attitude to be adopted towards the associated lesions.