Final answer:
The immediate treatment for a 45-year-old woman experiencing severe chest pain is to administer supplemental oxygen, aspirin, and nitroglycerin.
Step-by-step explanation:
The immediate treatment for a 45-year-old woman experiencing severe chest pain is to administer supplemental oxygen, aspirin to break up clots, and nitroglycerin sublingually to facilitate its absorption. Taking aspirin helps to prevent further clot formation and nitroglycerin helps to relax the smooth muscles in the coronary vessels, improving blood flow to the heart. These treatments should be provided while the patient is being transported to the hospital.
Administering aspirin, nitroglycerin, and oxygen is the appropriate course of action in this situation.