A nurse in an emergency department is assessing a client who is having a suspected acute myocardial infarction (MI). Which of the following manifestations should the nurse expect to find for a client experiencing an acute MI? (Select all that apply)

Rationale: A. Orthopnea (difficulty breathing when lying flat) is more characteristic of heart failure, not the acute presentation of MI. B. Chest pain is the hallmark symptom of an acute MI, often described as pressure, squeezing, or heaviness in the chest. C. The sympathetic nervous system often responds to myocardial ischemia with increased heart rate, making tachycardia a common finding. D. Headache is not a typical manifestation of MI and is not used in diagnostic assessment for acute coronary events. E. Excessive sweating is a common autonomic response during an acute MI due to sympathetic activation and pain.