LAMPOON Technique and Transapical Wire Externalization During Transcatheter Mitral Valve Replacement

Catheter Cardiovasc Interv. 2025 Jul;106(1):282-285. doi: 10.1002/ccd.31545. Epub 2025 Apr 21.

Abstract

A 74-year-old woman with failed mitral surgical repair underwent transcatheter mitral valve-in-ring replacement. Pre-procedural assessment highlighted a substantial risk for valve misalignment and left ventricular outflow obstruction. Electrosurgical laceration of the anterior mitral leaflet to prevent outflow obstruction (LAMPOON) technique and transapical wire externalization for valve deployment were successfully employed to prevent these complications.

Keywords: LAMPOON; emory angle; left ventricular outflow obstruction; transapical wire externalization; transcatheter mitral valve replacement.

Publication types

  • Case Reports
  • Video-Audio Media

MeSH terms

  • Aged
  • Cardiac Catheterization* / adverse effects
  • Cardiac Catheterization* / instrumentation
  • Cardiac Catheterization* / methods
  • Echocardiography, Transesophageal
  • Electrosurgery*
  • Female
  • Heart Valve Prosthesis
  • Heart Valve Prosthesis Implantation* / adverse effects
  • Heart Valve Prosthesis Implantation* / instrumentation
  • Heart Valve Prosthesis Implantation* / methods
  • Humans
  • Mitral Valve Annuloplasty* / adverse effects
  • Mitral Valve Annuloplasty* / instrumentation
  • Mitral Valve Insufficiency* / diagnosis
  • Mitral Valve Insufficiency* / diagnostic imaging
  • Mitral Valve Insufficiency* / physiopathology
  • Mitral Valve Insufficiency* / surgery
  • Mitral Valve Insufficiency* / therapy
  • Mitral Valve* / diagnostic imaging
  • Mitral Valve* / physiopathology
  • Mitral Valve* / surgery
  • Prosthesis Design
  • Treatment Outcome
  • Ventricular Outflow Obstruction* / etiology
  • Ventricular Outflow Obstruction* / physiopathology
  • Ventricular Outflow Obstruction* / prevention & control