Firstly heart attack
involves the heart and stroke involves the brain.In both cases the blood supply is reduced leading to death of tissue.In heart attack the heart tissue dies.The function of the heart reduce.There is reduced pumping of the blood depending on the severity of the heart attack and quantity of tissue lost.This can lead to problems like shortness of breath
etc.A massive attack can cause the heart to stop function completely and the person dies.
In stroke the area of the brain where the tissue is damaged stops functioning.There is focal loss of function.The person will not be able to do an activity controlled by that part of the brain.It results in condition like hemiplegia
wherein one side of the body is non functional.Recovery is slow and unpredictable.Chances of death after first episode is much lesser compared to heart attack.