My Husband Had CAB X 3 29 Years Ago. He

My husband had CAB x 3 29 years ago. He has problems with atrial fibrillation and most recently had a pacemaker placed due to a very slow heart rate. He had a stroke in 2008. Now he is having problems with runs of vtach His physician feels his vtach can be controlled with higher doses of metropol. His ejection fraction is normal. he is 67 years old. what is your opinion