What is the dosing protocol for nitroglycerin in patients with STEMI and normal blood pressure?

In patients experiencing a STEMI (ST-Elevation Myocardial Infarction) with stable and normal blood pressure, the dosing protocol for nitroglycerin is critical for managing chest pain and reducing myocardial oxygen demand. The selected option conveys the appropriate dosing regimen, which is often 0.4 mg administered sublingually every 5 minutes, for a maximum of 3 doses.

Nitroglycerin works by dilating blood vessels, which helps decrease the workload on the heart and improves blood flow to the myocardium. Administering it every 5 minutes allows for rapid relief of symptoms while monitoring the patient's response, ensuring that the medication is effective without risking excessive hypotension, especially in cases where the blood pressure remains stable.

The maximum of 3 doses is consistent with clinical guidelines that advise reevaluation of the patient's status after this initial treatment period. During this time, paramedics can assess ongoing chest pain, vital signs, and prepare for further interventions if the patient's condition does not improve.

This dosing protocol as stated helps ensure patient safety and effective management during an acute heart event. The other options suggest either lower doses or more frequent administration than clinically recommended, which could mismanage the patient's treatment during a critical time.