A nurse in the emergency department is caring for a client who reports chest pressure and shortness of breath. Which of the following laboratory tests should the nurse anticipate the provider to prescribe?

A. AST is a liver enzyme used to assess hepatic function or hepatocellular injury. It is not a primary test for cardiac ischemia or chest pain evaluation. B. Troponin I is a cardiac-specific biomarker that is released into the bloodstream during myocardial injury or infarction. In a client presenting with chest pressure and shortness of breath, troponin I helps diagnose acute coronary syndrome (ACS) and guides emergent cardiac management. Serial measurements are often performed to detect rising or falling trends indicative of myocardial damage. C. Lipase is a pancreatic enzyme used to assess pancreatic injury or pancreatitis. While pancreatitis can sometimes cause epigastric pain, it is not the first-line test for chest pressure or suspected cardiac events. D. BNP is a marker of ventricular stretch and heart failure. Although it helps evaluate shortness of breath related to volume overload, it is not the primary test for diagnosing acute myocardial ischemia or infarction in a client presenting with chest pressure.