What does coronary occlusion refer to?

Coronary occlusion specifically refers to the blockage or obstruction of one or more of the coronary arteries, which supply blood to the heart muscle. This obstruction can occur due to plaque buildup, blood clots, or other factors that impede normal blood flow. When a coronary artery is occluded, it reduces or completely stops blood flow, which can lead to ischemia (reduced blood supply) in the heart muscle, and potentially result in a heart attack if not addressed promptly.

While insufficient blood supply to the heart muscle is a consequence of coronary occlusion and may be relevant in the context of related conditions, it does not directly define coronary occlusion itself. Malformation of the heart's valves pertains more to structural heart issues rather than the specific obstruction of arteries. Thus, the focus on the obstruction of the coronary arteries as the definition of coronary occlusion makes it the most accurate answer.