NCLEX Practice Quiz on Myocardial Infarction Symptoms NCLEX Practice Quiz on Myocardial Infarction: Identifying Urgent Symptoms for Immediate Action As a nurse, you are taking care of a patient who has been diagnosed with a myocardial infarction. What symptom would require your immediate attention? 1. Lightheadedness 2. Shortness of breath 3. Periorbital edema 4. Lethargy Δ