Final answer:
Angiospasm is a condition where one of the coronary arteries temporarily contracts and narrows, reducing blood flow and causing anginal pain. It occurs in one of the coronary arteries.
Step-by-step explanation:
Angina is a condition characterized by chest pain or pressure that occurs when the heart muscle cells do not receive enough blood flow and oxygen. It is caused by the partial blockage of the coronary arteries due to the buildup of plaque. The angiospasm referred to in Mrs. Smith's case is a condition where one of the coronary arteries temporarily contracts and narrows, reducing the blood flow to the heart muscle cells and causing anginal pain. The angiospasm occurs in one of the coronary arteries.