Transcatheter Edge-to-Edge Mitral Valve Repair for Severe Degenerative Mitral Regurgitation With Coexisting Cor Triatriatum Sinistrum.
BACKGROUND Cor triatriatum sinistrum (CTS) is a rare congenital malformation, and its coexistence with degenerative mitral regurgitation (MR) in older adults is exceptionally rare and creates substantial technical challenges for transcatheter interventions. CASE SUMMARY We report a 78-year-old woman presenting with p...