@lakehappy Welcome to this group! Vtach - Ventricular Tachycardia - is discussed here: https://www.mayoclinic.org/diseases-conditions/ventricular-tachycardia/symptoms-causes/syc-20355138. About 2-3 weeks after my septal myectomy, I developed dizziness and giddiness which was eventually diagnosed as arrhythmia, do not know if it was labeled Vtach. I acquired Buddy, my ICD, problem solved. Have you been diagnosed with HCM? Are you under care at a COE (Center of Excellence)? Have you an electrophysiologist (a cardiologist who specializes in the electrical functioning of hearts)? Please do follow up and please keep us updated as you progress along this heart journey.