During a routine visit, a patient suddenly develops shortness of breath and tightness in the chest, and reports a tingling sensation in the arms. As a medical assistant, your first action should be to:
Provide the patient with supplemental oxygen if available and await further instructions.
Administer aspirin to prevent potential clotting and instruct the patient to chew it.
Immediately call for assistance from a nurse, physician, or other healthcare professionals who are nearby or activate emergency medical services by calling 911 or local emergency number.
Monitor the patient's vital signs while waiting for signs of improvement.