What is an immediate action a nurse should take if a patient shows signs of a myocardial infarction?

When a patient shows signs of a myocardial infarction, the priority is to ensure that emergency assistance is summoned promptly. This action is critical because a myocardial infarction, commonly known as a heart attack, can lead to severe complications and can be life-threatening. The sooner emergency responders are on the scene, the more likely it is that the patient will receive timely and effective treatment, which is essential in minimizing heart damage and improving outcomes.

Calling for emergency assistance also allows for advanced care to be mobilized, including the possibility of transport to a medical facility where interventions such as angioplasty or the administration of thrombolytics can take place. This immediate step takes precedence over administering pain relief, providing patient education, or other actions, as the first concern in this scenario is the patient's safety and stabilization before any other interventions can occur.

Thus, sending for help is the most appropriate and urgent course of action in dealing with a suspected myocardial infarction.