Preemptive Alcohol Septal Ablation to Prevent Left Ventricular Outflow Tract Obstruction after Transseptal Mitral Valve in Valve.

Acute obstruction of the neo-LVOT is a major and potentially fatal complication of transcatheter mitral valve implantation. Patients at high risk of this complication can be identified preoperatively with cardiac CT. We describe a case of a patient identified as high risk for developing neo-LVOT obstruction, who was preemptively treated with alcohol septal ablation prior to successful valve implantation.