What are the pathophysiologic changes that place a client who has suffered a myocardial infarction at risk for cardiogenic shock?
Decreased cardiac output and increased MAP
Decreased cardiac output and decreased MAP
Increased cardiac output and increased afterload
Increased cardiac output and increased MAP
The Correct Answer is B
A. Decreased cardiac output with increased mean arterial pressure (MAP) does not typically occur in cardiogenic shock. In shock states, MAP tends to decrease.
B. Decreased cardiac output and decreased MAP are the hallmark pathophysiologic changes in cardiogenic shock following a myocardial infarction. The damaged myocardium cannot pump effectively, leading to poor perfusion and hypotension.
C. Increased cardiac output and increased afterload are not features of cardiogenic shock; in fact, cardiac output is decreased.
D. Increased cardiac output and increased MAP suggest improved perfusion, not the compromised state seen in cardiogenic shock.
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Related Questions
Correct Answer is C
Explanation
A. Anaphylactic shock is a life-threatening allergic reaction, but it is less common and less frequently the cause of ICU deaths compared to septic shock.
B. Neurogenic shock results from spinal cord injuries or central nervous system damage and is relatively rare.
C. Septic shock is the most common cause of death in intensive care units in the United States. It results from overwhelming infection and leads to systemic inflammation, vasodilation, and multi-organ dysfunction.
D. Cardiogenic shock occurs due to the heart’s inability to pump effectively, often after a major myocardial infarction, but it is not the leading cause of death in ICUs.
Correct Answer is A
Explanation
A. The presence of prosthetic heart valves is a significant risk factor for infective endocarditis due to the increased likelihood of bacterial colonization.
B. Sedentary lifestyle is not a direct risk factor for infective endocarditis, though it may contribute to other cardiovascular issues.
C. Radiation exposure – While it may affect cardiac tissue, it is not considered a risk factor for infective endocarditis.
D. Cardiac catheterization – While it is an invasive procedure, it is not a major or common risk factor for infective endocarditis compared to prosthetic valves or structural heart defects.
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