Signs and symptoms of cardiogenic shock?

BCCL kharkhanda Staff Nurse - 2015

Medical & Surgical Nursing

Medium

Appeared in: BCCL kharkhanda Staff Nurse - 2015

Explanation

Cardiogenic shock is defined by the heart's inability to pump sufficient blood, leading to decreased cardiac output.
This reduction in systemic blood flow causes hypoperfusion of vital organs, including the kidneys.
When the kidneys are poorly perfused, they respond by drastically reducing urine production to conserve body fluid, resulting in oliguria (urine output less than 0.5 mL/kg/hr).
Therefore, oliguria is a direct and critical indicator of end-organ hypoperfusion in cardiogenic shock.

Option B: In cardiogenic shock, the sympathetic nervous system is activated as a compensatory mechanism, which leads to tachycardia (an increased heart rate), not bradycardia.
Option C: A defining characteristic of cardiogenic shock is profound hypotension (low blood pressure) due to the failure of the heart's pumping action.
Option D: Fever is a systemic response to infection or inflammation and is not a feature of cardiogenic shock, which is a problem of mechanical pump failure.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Clinical manifestations of cardiogenic shock as background academic context rather than a clinical decision trigger.
For a nurse, monitoring urine output is one of the most crucial and non-invasive ways to assess organ perfusion in a critically ill patient. A drop in urine output is often the earliest sign of worsening shock.
Prompt recognition of oliguria allows for timely intervention, such as fluid challenges (if appropriate) or starting/titrating vasoactive medications, which can prevent progression to acute kidney injury and irreversible organ damage.
What if? If a patient in cardiogenic shock suddenly develops a high fever, the nurse must immediately consider the possibility of a superimposed infection or septic shock. This would require obtaining blood cultures and initiating broad-spectrum antibiotics in addition to the ongoing hemodynamic support.

How to Approach the Question

First, identify the core concept of the question, which is 'cardiogenic shock'.
Recall the basic pathophysiology: cardiogenic shock is 'pump failure'. The heart cannot pump blood effectively.
Think through the consequences of pump failure: If the pump is weak, blood pressure will be low (hypotension), not high. To compensate, the heart will beat faster (tachycardia), not slower.
Consider the effect on major organs. With poor blood flow from the heart, the kidneys will receive less blood and produce less urine (oliguria).
Evaluate each option based on this logical flow: Oliguria fits the pathophysiology. Bradycardia, elevated BP, and fever are inconsistent with the primary mechanism of cardiogenic shock.

Concept Tested & Keywords

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