If you didn't already answer your question inside of your question, it could be a heart attack. aka cardiac arrest.
Cardiac arrest is simply the complete shutoff of the arteries to the heart so that the heart is essentially stuck and cannot pump any blood toward or away from itself. So the heart stops working, or arrests itself.
Otherwise, things like infections or simply the heart having to strain itself to the point of causing pain in the chest can be caused by partially clogged arteries.
The partially clogged arteries can be caused by any number of things. Fast food is commonly known as a plaque builder which can cause clogged arteries and chest pain.
narrowing or blockage (stenosis) in the coronary arteries, with narrowing greater than 50% considered significant
Cholesterol is the substance associated with animal fat that causes atherosclerosis(the narrowing, or hardening, of arteries due to plaque that is formed from cholesterol build up in coronary arteries).
injecting a dye into the vascular system to outline the heart and coronary vessels. Angiography allows the visualization of any blockages, narrowing, or abnormalities in the coronary arteries.
it will cause deposition of cholesterol in the artery, narrowing it's lumen and may lead to ischemia, and worst obstruction may lead to myocardial infarction.
The heart muscle is supplied with oxygenated blood by the coronary arteries. Along with the oxygenated blood, the arteries also supplies the heart muscle with nutrient-filled blood.
Coronary artery
The coronary arteries.
coronary arteries provide blood supply to the heart
Coronary Artery Ecstasia is the abnormal dilation of arteries surrounding the heart. Instead of having narrowing arteries, the arteries are enlarged and then go back to normal size. The problem is the blood builds up in the dilated part of the artery and has to make its way down through the normal part of the artery This is a danger that can cause the blood to clot before it is able to move through the narrow part of the artery causing an aneurysm.
Coronary artery disease caused by atherosclerosis
The coronary arteries get their blood directly from the aorta.
The coronary arteries transport oxygen-rich blood to the heart muscle. These arteries are responsible for supplying the heart with the oxygen and nutrients it needs to function properly. If there is a blockage or narrowing in these arteries, it can lead to various heart conditions such as heart attack.