Which electrocardiographic (ECG) change is most important for the nurse to communicate to the health care provider when caring for a patient with chest pain?

Question

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The patient is likely to be experiencing an ST-segment-elevation myocardial infarction (STEMI) and immediate therapy with percutaneous coronary intervention (PCI) or fibrinolytic medications is indicated to minimize the amount of myocardial damage. The other ECG changes also may suggest a need for therapy, but not as rapidly.

Which Electrocardiographic (ECG) Change Is Most Important for the Nurse