A nurse is reviewing the laboratory values of a client who had a myocardial infarction 3 hr ago. The nurse should expect which of the following laboratory values to be elevated?
Serum amylase
Unconjugated bilirubin
Aspartate aminotransferase (AST).
Troponin I
The Correct Answer is D
A. Serum amylase: Serum amylase is an enzyme associated with pancreatic function, and its elevation is not specific to myocardial infarction.
B. Unconjugated bilirubin: Elevation of unconjugated bilirubin is associated with liver function and hemolysis, not specifically with myocardial infarction.
C. Aspartate aminotransferase (AST): While AST may be elevated in conditions affecting the heart, it is not as specific or sensitive for myocardial infarction as troponin I.
D. Troponin I: This is the correct answer. Troponin I is a cardiac-specific biomarker released into the bloodstream when there is damage to cardiac muscle, such as during a myocardial infarction. Troponin I levels start to rise within 3-4 hours after the onset of myocardial infarction, making it a crucial marker for early detection.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. A room that is within view of the nurses' station: While visibility to the nurses' station is advantageous for monitoring the client, it is not the most critical consideration for a client with active tuberculosis. The priority is to prevent the spread of infectious droplets to other clients and healthcare workers.
B. A room in the ICU: Placing a client with active tuberculosis in the ICU may not be necessary unless there are specific medical reasons requiring intensive care. However, the room assignment should prioritize infection control measures.
C. A room with another nonsurgical client: It is not advisable to place a client with active tuberculosis in a room with another nonsurgical client due to the risk of spreading the infection to a potentially vulnerable individual.
D. A room with air exhaust directly to the outdoor environment: This is the correct answer. The preferred room assignment for a client with active tuberculosis is one with proper ventilation that allows air to be exhausted directly to the outdoor environment. Negative pressure rooms with high-efficiency particulate air (HEPA) filtration are often used to minimize the risk of airborne transmission.
Correct Answer is D
Explanation
A. A friction rub:A friction rub is a sound caused by the rubbing of inflamed pericardial layers and is not classified as a heart sound like S1 or S2. It is unrelated to the sequence of heart sounds.
B. A split second heart sound S₂:A split S₂ occurs during the closure of the aortic and pulmonary valves and is heard after S1, not before.
C. The third heart sound (S3):S3, or the ventricular gallop, occurs shortly after S2 during early diastole and indicates rapid ventricular filling. It is not heard before S1.
D. The fourth heart sound (S4):S4, known as the "atrial gallop," occurs just before S1 during atrial contraction. It is associated with a stiff or hypertrophied ventricle and is often indicative of underlying heart disease, especially in older adults.
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