What does coronary heart disease do to the body?

Coronary Heart disease affects the coronary arteries which supply glucose and oxygen to the heart.

Sometimes, the coronary arteries get blocked (because of blood clots or the lumen has become smaller), so less/ no oxygen or glucose can be supplied to the heart.

. If the blockage is lower down in the artery, then the symptoms will be milder, because a small area of muscle will suffer oxygen deprivation.

This disease can be fatal - as this will cause a heart attack (also known as "myocardial infarction") and the heart will eventually stop beating because the blood supply is completely cut off.