The fear of death is one of mankind's oldest fears, of which no one is quite sure what the "other side" is. 
How To Deal With Death Anxiety
In some cases, when a person suffers from heart disease, the fear of death increases and he needs to know that his time is almost over.
These feelings sometimes referred to as "death anxiety," often lead to grief and create many problems in their relationship. This "death anxiety" can sometimes be painful for the dying, although some emotional side effects have been observed.
