illness caused by the reduction of the blood flow to the heart musclethe unbalance between the oxygen level and the requirements; mainly due to the arteriosclerotic damage of the coronary arteries (the veins that irrigate the myocardium). This type of coronaey arteriosclerotic illness lacks pain. It is diagnosed based on the anamnesis, the clinical exam and additional investigations: EKG, echocardiography, effort test, Holter EKG etc.