My husband had a very bad heat attack 2 years ago.He also had a change in his behavior I finally did alot of reading and talking to other patients.I insisted he see his doctor and I talk to the doctor and told him what going on and he gave him a antidepressant and he is back to normal.It is very normal and most Heart patients take a antidepressant ,It is nice to have him back to where he was before the attack.