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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. PVCs during suctioning may indicate hypoxia or irritation; the priority is to stop suctioning and ventilate the patient with 100% oxygen to prevent worsening arrhythmias.
B. Medications may be needed later, but immediate action is oxygenation and stopping suctioning.
C. Adjusting suction pressure is important but secondary to ensuring patient oxygenation.
D. Documentation is necessary but not the priority when PVCs are noted.
Correct Answer is D
Explanation
A. Ventricular tachycardia is a run of three or more consecutive ventricular beats at a rapid rate, not every other beat.
B. Multifocal premature ventricular contractions (PVCs) arise from different ventricular foci and have different shapes, but this scenario describes uniform shape and consistent pattern.
C. Ventricular couplets are two consecutive PVCs, not a pattern where every other beat is abnormal.
D. Ventricular bigeminy is the correct term for a rhythm in which every other beat is a premature ventricular contraction (PVC). These PVCs typically have no visible P wave and a wide, bizarre QRS complex, matching the description given.
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