septostomy

septostomy
Surgical creation of a septal defect. [septo- + G. stoma, mouth]
- atrial s. establishment of a communication between the two atria of the heart. SYN: atrioseptostomy.
- balloon s. s. performed by cardiac catheterization with the use an of inflated balloon pulled across the interatrial septum through the foramen ovale; used in cases of transposition of the great vessels and tricuspid atresia.

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sep·tos·to·my sep-'täs-tə-mē n, pl -mies the surgical creation of an opening through the interatrial septum

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sep·tos·to·my (sep-tosґtə-me) [septo- + -stomy] surgical creation of an opening in a septum.

Medical dictionary. 2011.

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