Hello Thanks for posting at HCM. I have gone through your description. You have not provided information about how is his current health status, like if he is in the hospital, is he on ventilatory support or oxygen requirement or if he is in the icu or wards. So it is very difficult to comment on the life expectancy now. Since he has suffered multiple heart attacks and his EF has dropped to 27%, it is classified as severe LV dysfunction. But some patients with severe LV dysfunction do very well on optimised medications. He has to be on diuretics( water pill), beta blocker medications and other medications which prevent remodeling of the heart. Also he must be on blood thinner meditations, cholesterol lowering medications ( statins) and anti anginals. He must be very regular with his meditations and daily food intake should be restricted to 1-1.2 liters per day. If he gets discharged in a good health and he continues on above medicines and restrictions, he should do well. Otherwise he may have repeateded episodes of heart failure requiring hospitalisation. Wishing him good health Regards