Pain

Suddenly Alex began to choke of spasm and clutched his chest. Feeling heavy compressing pain in his heart he cried, "Angelina, Angelina …. I am dying! This is my death, but I want to live”! Pain was unbearable.
But it was not the end. Alex did not fly to distant stars in the heavens. Five minutes later the pain subsided, and he remembered what the doctor had told him last week. This pain was not a heart attack and heartburn. That was angina pectoris. Angina is a severe chest pain due to a lack of blood and oxygen supply of a heart muscle. And this was an ominous sign that the arteries of his heart were clogged with cholesterol plaques. Blood could not get through and fill the heart. In addition, the fat, well-salted food, and the dispute with Angelina, - any of these reasons could cause severe pain.
“ These tablets should be taken, if it hurts - the doctor warned. - But I say again to you, Alex, if you do not change their habits, you may find trouble. And no smoking, of course”. My brother was aware that coronary artery disease is due to atherosclerosis of the cardiac arteries. But people believe they will live for ever.
What must be done if such a trouble happens to people like Alex? What kind of habits did he mean? What was happening at least? What do doctors advise?