commissurotomy

noun
com·​mis·​sur·​ot·​o·​my | \ ˌkäm-ə-ˌshu̇(ə)r-ˈät-ə-mē, -shə-ˈrät- How to pronounce commissurotomy (audio) \
plural commissurotomies

Medical Definition of commissurotomy

: the operation of cutting through a band of muscle or nerve fibers specifically : separation of the flaps of a mitral valve to relieve mitral stenosis : valvulotomy

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