What Must Be Done For Chest Pain ?

My mother suffers from chest pain , may be from the heart for a very long time now. This happens when she is depressed or sad and angry. This dissapears when she rest for a while after the anger or depression . Also, when she exerts physical effort like going u the stairs going to the fourth floor. She takes a beta-blocker whenever she fells pain (medicines ending in olol ).Someimes, the pain may last for a week then dissapears. Her last doctor visit was about 8 years ago. She is a stubborn kind of person who seems to be very busy for that. She is 49 years old, working in our store. Her is moderate, not so heavy. What must be done for this? What can I do o make her subject herself to examination? Could this develop in sudden Myocardial Infarction and sudden death?