Final answer:
The next action would be to administer aspirin to the patient. Aspirin is a crucial medication for patients with STEMI as it helps to break up blood clots and restore blood flow to the affected heart muscle. In addition to aspirin, the patient is already receiving heparin which is an anticoagulant.
Step-by-step explanation:
The next action would be to administer aspirin to the patient. Although the patient has a history of gastritis, if that condition was treated 5 years ago, it should not prevent the administration of aspirin in this emergency situation. Aspirin is a crucial medication for patients with ST-elevation myocardial infarction (STEMI) as it helps to break up blood clots and restore blood flow to the affected heart muscle.
In addition to aspirin, the patient is already receiving heparin, which is an anticoagulant. Heparin helps to prevent the formation of new blood clots. Together, aspirin and heparin work synergistically to address the underlying cause of the ongoing chest discomfort and to prevent further complications.