A 54-year-old man comes to triage complaining of severe, left-sided, pressure-like chest pain and left arm numbness. The pain began 2 hours ago and is unrelieved by rest. The patient is anxious,...

A 54-year-old man comes to triage complaining of severe, left-sided, pressure-like chest pain and left arm numbness. The pain began 2 hours ago and is unrelieved by rest. The patient is anxious, diaphoretic, and complaining of nausea. Cardiac monitoring is begun, and oxygen is given at 2 L/min. An intermittent infusion device (IID) is in place, and vital signs are as follows: BP of 128/68 mm Hg; pulse, 76 beats/min; respirations easy and regular at 20 breaths/min. ECG reveals normal sinus rhythm with occasional unifocal premature ventricular contractions (PVCs). The nurse suspects an MI based on an elevation in the which lab study?

a. CK-MB and LDH

b. LDH and troponin I

c. CK-MB and troponin I

d. Troponin I and SGPT