Coronary heart disease is caused by:

reduced blood flow to the heart

reduced nutrient flow to the heart

reduced oxygen flow to the heart

reduced electrical flow to the heart

Reduced oxygen flow to the heart

The correct answer is reduced oxygen flow to the heart.

Explanation:

Coronary heart disease brings various complications such as acute myocardial infarction, arrhythmias, angina pectoris. The cause of this disease is atherosclerosis caused by the formation of atheroma plaque (formed by cholesterol, fatty acids, calcium, fibrin) in the arteries that supply the heart. The accumulation of this hard plate in these blood vessels, decreases the blood flow leading to the least amount of oxygen that reaches the heart, and can generate a heart attack.