A nurse is caring for a client brought to the emergency room with acute chest pain. The client is being worked up for possible acute myocardial infarction (MI). The client asks why blood is being drawn for cardiac enzymes. What should the nurse explain to the client regarding why the cardiac enzyme troponin is being collected?
"These tests will enable the provider to determine the heart structure and mobility of the heart valves."
"Cardiac enzymes assist in diagnosing the presence of congestive heart failure."
"Cardiac enzymes like troponin shows there has been damage to the heart tissues and muscle."
"Cardiac enzymes will identify the exact location of the MI."
The Correct Answer is C
A) "These tests will enable the provider to determine the heart structure and mobility of the heart valves." This statement is incorrect because cardiac enzyme tests, including troponin levels, do not assess heart structure or valve mobility. Imaging studies like echocardiograms are typically used for evaluating heart structure and function.
B) "Cardiac enzymes assist in diagnosing the presence of congestive heart failure." While cardiac enzymes can provide some information about heart function, they are not specifically used to diagnose congestive heart failure. The primary role of cardiac enzymes, particularly troponin, is in diagnosing myocardial injury, such as an acute myocardial infarction.
C) "Cardiac enzymes like troponin shows there has been damage to the heart tissues and muscle." This statement accurately reflects the purpose of measuring troponin levels. Troponin is a protein released into the bloodstream when heart muscle cells are damaged, making it a crucial biomarker for diagnosing an acute myocardial infarction.
D) "Cardiac enzymes will identify the exact location of the MI." This statement is misleading. While troponin levels can indicate that damage has occurred, they do not provide information about the specific location of the myocardial infarction. Other imaging techniques, such as an angiogram, are needed to determine the exact location of blockages or damage.
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Correct Answer is C
Explanation
A) "These tests will enable the provider to determine the heart structure and mobility of the heart valves." This statement is incorrect because cardiac enzyme tests, including troponin levels, do not assess heart structure or valve mobility. Imaging studies like echocardiograms are typically used for evaluating heart structure and function.
B) "Cardiac enzymes assist in diagnosing the presence of congestive heart failure." While cardiac enzymes can provide some information about heart function, they are not specifically used to diagnose congestive heart failure. The primary role of cardiac enzymes, particularly troponin, is in diagnosing myocardial injury, such as an acute myocardial infarction.
C) "Cardiac enzymes like troponin shows there has been damage to the heart tissues and muscle." This statement accurately reflects the purpose of measuring troponin levels. Troponin is a protein released into the bloodstream when heart muscle cells are damaged, making it a crucial biomarker for diagnosing an acute myocardial infarction.
D) "Cardiac enzymes will identify the exact location of the MI." This statement is misleading. While troponin levels can indicate that damage has occurred, they do not provide information about the specific location of the myocardial infarction. Other imaging techniques, such as an angiogram, are needed to determine the exact location of blockages or damage.
Correct Answer is C
Explanation
A) Intermittent claudication: This symptom is indicative of arterial insufficiency, not chronic venous insufficiency. Intermittent claudication is characterized by pain in the legs during activity due to insufficient blood flow, which is not typical in venous conditions.
B) Decreased pedal pulses: In chronic venous insufficiency, pedal pulses are usually normal. Decreased pedal pulses suggest arterial disease, where blood flow is compromised. Thus, this finding would not be expected in a client with venous insufficiency.
C) Bronze/brown discoloration of the skin: This is a hallmark finding in chronic venous insufficiency. The discoloration occurs due to the deposition of hemosiderin from the breakdown of red blood cells, which is a result of prolonged venous stasis and chronic edema, particularly around the lower extremities.
D) Cool skin temperature: Skin temperature in chronic venous insufficiency is typically warm due to increased blood flow and stasis in the veins. Cool skin temperature is more characteristic of arterial insufficiency, where blood supply is reduced and can lead to cooler extremities.
E) Full screen mode is in effect during your proctored testing: This statement is irrelevant to the clinical assessment of chronic venous insufficiency and serves no purpose in understanding the client’s condition. It does not contribute to the assessment findings.