A 55-year-old client who is diagnosed with an evolving myocardial infarction (MI) insists on going home. The nurse encourages the client to be admitted because he knows that within the first 24 hours of a MI, there is a high risk for which of the following?
ventricular aneurysm
heart failure
pulmonary embolism
dysrhythmia
The Correct Answer is D
A. Ventricular aneurysm. Ventricular aneurysms are a complication that typically develops weeks or months after an MI.
B. Heart failure. While heart failure is a risk following an MI, it is more of a concern in the longer term after the acute phase.
C. Pulmonary embolism. Pulmonary embolism is not a direct complication of MI and is less common in the immediate post-MI period.
D. Dysrhythmia: Within the first 24 hours following a myocardial infarction, dysrhythmias, particularly ventricular arrhythmias, are common and can be life-threatening. This is the highest risk during the early period after MI.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Suppresses ectopic ventricular sites: Atropine primarily increases heart rate; it does not directly suppress ectopic ventricular activity.
B. Increases SA node automaticity: Atropine blocks the parasympathetic nervous system, increasing SA node activity and heart rate in cases of bradycardia or asystole.
C. Increases myocardial contractility: This effect is more related to drugs like inotropes (e.g., dopamine), not atropine.
D. Decreases AV node conduction: Atropine actually increases conduction through the AV node by blocking vagal stimulation.
Correct Answer is A
Explanation
A. Troponin: Troponin is the most specific and reliable biomarker for myocardial injury. Levels rise within 3-6 hours and remain elevated for days, providing diagnostic and prognostic information.
B. Alkaline phosphatase: This is related to liver and bone disorders, not cardiac events.
C. Creatine kinase (CK): While CK-MB is specific to cardiac tissue, it is less specific and remains elevated for a shorter period compared to troponin.
D. Myoglobin: Myoglobin is an early but nonspecific marker of muscle damage and is not as reliable for diagnosing myocardial injury.
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