International LAMPOON: first European experience with laceration of the anterior mitral valve leaflet prior to transseptal transcatheter mitral valve implantation. Intentional Laceration of the Anterior Mitral Valve Leaflet to Prevent Left Ventricular Outflow Tract Obstruction During Transcatheter Mitral Valve Replacement: Pre-Clinical Findings. Tip-to-base LAMPOON to prevent left ventricular outflow tract obstruction in a valve-in-ring transcatheter mitral valve replacement: First LAMPOON procedure in Turkey and first LAMPOON case for transseptal Myval™ implantation. Case Report 363 Tip-to-base LAMPOON to prevent left ventricular outflow tract obstruction in a valve-in-ring transcatheter mitral valve replacement: First LAMPOON procedure in Turkey and first LAMPOON case for transseptal Myval™ implantation Teoman Kiliç*, Senol Coskun*, Özgür Çakir**, Revan Isravilov*, Sadan Yavuz***, Tülay Hosten****, Tayfun Sahin* Departments of *Cardiology, and **Radiology, ***Cardiovascular Surgery, ****Anesthesiology, Faculty of Medicine, Kocaeli University; Kocaeli-Turkey Introduction Transcatheter mitral valve replacement (TMVR) using aortic transcatheter heart valves is an emerging alternative treatment modality to reoperation among high-risk patients with failed mitral bioprosthetic valves and failed annuloplasty rings (1-4). [Extracted from the article]