The document outlines the emergency response procedure for a patient experiencing a heart attack from their arrival at the emergency room through diagnosis and treatment. An ER nurse performs an initial triage and examination of the patient, then an ER physician makes an initial diagnosis and orders tests. If a major heart issue is confirmed, the cardiologist is contacted and the patient is prepared for potential surgery or other treatments in the catheterization laboratory to reopen blocked arteries and restore blood flow to the heart.