Cardiogenic shock is precipitated by

ESIC Nursing Officer - 2019 (Shift-2)

Medical & Surgical Nursing

Easy

Appeared in: ESIC Nursing Officer - 2019 (Shift-2)

Explanation

Cardiogenic shock is defined as a state of low cardiac output caused by myocardial pump failure.
Myocardial infarction (MI) directly damages the heart muscle, impairing its ability to contract and pump blood effectively.
This reduction in the heart's pumping function leads to decreased cardiac output and systemic hypoperfusion, which is the definition of cardiogenic shock.

Option A: Bacteremia (bacteria in the blood) is the primary trigger for septic shock, which is a form of distributive shock caused by a systemic inflammatory response, not primary cardiac failure.
Option B: Spinal cord injury causes neurogenic shock, a type of distributive shock resulting from a loss of sympathetic tone to the blood vessels, leading to massive vasodilation.
Option D: A severe allergy triggers anaphylactic shock, a distributive shock caused by a massive release of histamine and other inflammatory mediators, leading to widespread vasodilation and capillary leak.

Visual 1: Flowchart illustrating the pathophysiology of cardiogenic shock following a myocardial infarction, showing the progression from muscle damage to decreased cardiac output and systemic hypoperfusion.
Visual 2: Table comparing the four main types of shock (Cardiogenic, Septic, Neurogenic, Anaphylactic) with their primary causes, hemodynamic changes, and key clinical signs.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Etiology of Cardiogenic Shock and Differentiation of Shock Types as background academic context rather than a clinical decision trigger.
Early recognition of the specific shock type is critical for nurses, as treatment strategies differ significantly. For example, large fluid boluses are contraindicated in cardiogenic shock but are a primary treatment for septic or hypovolemic shock.
Nurses must continuously monitor hemodynamic parameters (BP, HR, urine output) and be prepared to administer inotropes (e.g., dobutamine) or vasopressors (e.g., norepinephrine) for cardiogenic shock.
What if? If a patient with cardiogenic shock also has a fever and an elevated white blood cell count, the nurse should consider the possibility of mixed shock (e.g., cardiogenic and septic shock), which requires a complex management approach addressing both pump failure and infection.

How to Approach the Question

First, identify the core concept in the question: the cause ('precipitated by') of a specific type of shock ('Cardiogenic shock').
Recall the definition of cardiogenic shock: it is a problem with the heart's 'pump' function.
Evaluate each option based on this definition. Ask yourself: 'Does this condition directly damage the heart muscle or its ability to pump?'
Myocardial infarction directly damages the heart muscle, making it the most likely cause of pump failure.
Consider the other options. Bacteremia relates to infection (septic shock), spinal cord injury to nerve function (neurogenic shock), and severe allergy to an immune reaction (anaphylactic shock). These cause distributive shock, not cardiogenic shock.
Select the option that represents a primary failure of the myocardial pump.

Concept Tested & Keywords

Concept Tested: Etiology of Cardiogenic Shock and Differentiation of Shock Types
Stem keywords: Cardiogenic shock, precipitated by
Lead-in keywords: BEST, MOST RELEVANT CLUE
Negative lead-in flag: false

Q6ERZCKpfJoBDXITAw_TVj