Which condition represents pump failure causing inadequate perfusion?

• A. Cardiogenic Shock
• B. Peripheral Edema
• C. Cardiac Tamponade
• D. Pulmonary Edema

Answer: (A)

The key idea is that inadequate tissue perfusion from a failing heart is cardiogenic shock. In this condition, the heart’s pumping ability is severely impaired, so cardiac output drops and mean arterial pressure falls despite enough or even excess blood volume. Tissues don’t receive enough blood flow and oxygen, leading to signs like cold, clammy skin, low urine output, and altered mental status.

Peripheral edema comes from fluid overload due to venous congestion and isn’t the direct cause of reduced forward flow. Cardiac tamponade reduces filling and output by external compression (an obstructive problem, not a primary pump failure). Pulmonary edema reflects fluid backing up into the lungs from left-sided failure, but it’s a consequence of impaired pumping rather than the defining mechanism of systemic hypoperfusion.