Which laboratory studies are typically obtained in evaluating cardiogenic shock?

• A. BNP, ABGs, troponin, lactate
• B. Cholesterol panel
• C. Vitamin D level
• D. Creatinine only

Answer: (A)

In cardiogenic shock, you want labs that reflect heart failure mechanics, heart muscle injury, and how well tissues are being perfused. BNP rises with ventricular stretch and volume overload, helping confirm that the heart failure process is driving the shock. Arterial blood gases show the patient’s oxygenation and acid-base status, revealing metabolic or respiratory derangements from poor perfusion. Troponin detects myocardial injury, which can indicate a superimposed infarction or stress-related injury and helps guide urgent management. Lactate is a key marker of tissue hypoperfusion and correlates with shock severity and prognosis; rising levels signal that organs aren’t getting enough blood flow and help monitor response to therapy.

Cholesterol panel isn’t part of the acute assessment of shock, as it reflects long-term risk rather than immediate status. Vitamin D levels have little relevance in the acute evaluation. Creatinine alone assesses kidney function but doesn’t provide the full picture of cardiogenic shock; renal function is important to monitor, but it’s not sufficient by itself to evaluate the hemodynamic state.