A nurse is collecting data for a client who experienced a myocardial infarction prior to a cardiac arrest. Which of the following laboratory tests will identify early injury to the cardiac muscle?
Creatine kinase-myocardial band (CK-MB) test
Troponin T test
Brain natriuretic peptide (BNP) test
Creatine kinase (CK) test
The Correct Answer is B
A. Creatine kinase-myocardial band (CK-MB) test: While CK-MB is also a marker of myocardial injury, it is less specific than troponin and can be elevated in other conditions, such as muscle injury.
B. Troponin T test. The Troponin T test is highly specific and sensitive for myocardial injury and is considered the gold standard for diagnosing a myocardial infarction. Troponin levels rise within hours of cardiac muscle injury and remain elevated for days, providing an early and reliable indicator of cardiac muscle damage.
C. Brain natriuretic peptide (BNP) test. BNP levels are used to assess heart failure and do not indicate acute cardiac muscle injury.
D. Creatine kinase (CK) test. CK measures overall muscle injury, not specific to cardiac muscle.
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Correct Answer is A
Explanation
A. "Cardiac rehabilitation cannot undo the damage to your heart, but it can help you get back to your previous level of activity safely." This response is therapeutic and educative, helping the client understand that while damage cannot be reversed, rehabilitation supports safe recovery and improved quality of life.
B. "Your doctor is the expert here, and I'm sure he would only recommend what is best for you." This response does not address the client’s concerns and lacks supportive or educational value.
C. "You are probably right and I agree with you, but I still think you should go." This dismissive response fails to provide support, education, or empathy.
D. "It's not unusual to feel that way at first, but once you learn the routine, you'll be fine." Although this statement offers some support, it lacks the educational element needed to address the client’s concerns about the purpose of rehabilitation.
Correct Answer is B
Explanation
A. Fatigue. Fatigue can be a common symptom of various health conditions, including heart disease, and is not specific to pacemaker malfunction.
B. Rapid pulse. A rapid pulse or palpitations may signal a malfunction where the pacemaker is pacing too quickly or erratically.
C. Increased urine output. Increased urine output is not related to pacemaker function and does not indicate a malfunction.
D. Sneezing. Sneezing is unrelated to pacemaker malfunction and does not warrant provider notification.