septostomy

noun

sep·​tos·​to·​my sep-ˈtäs-tə-mē How to pronounce septostomy (audio)
plural septostomies
: the surgical creation of an opening through the interatrial septum

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“Septostomy.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/septostomy. Accessed 3 Mar. 2025.

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