Final answer:
The best outcomes for a patient with STEMI receiving PCI occur when the procedure is administered within 90 minutes of their first medical contact.
Step-by-step explanation:
A patient admitted to the emergency department with a diagnosis of STEMI (ST-elevation myocardial infarction) at a facility capable of administering PCI (percutaneous coronary intervention) should receive therapy within a specific timeframe to achieve the best outcomes. The current guideline for the administration of PCI for patients with STEMI is to perform the procedure within 90 minutes of the patient's first medical contact. This approach is consistent with best practice recommendations to minimize heart damage and improve the prognosis following a heart attack.