i think its a disease related to the less blood supply to the heart.it may be due to any thrombus(majorly) or spasmodic condition of artery or atherosclerosis of artery(means loss of elasticity).it...
A diet rich in cholesterol and saturated animals fats. Emotional Stress. Smoking or taking Alcohol. Overweight Answered by, Ahmad Shahbaz Khalid Student of O-levels