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 D
Explanation
A. Elevated thyroid hormone levels. While amiodarone can cause thyroid dysfunction, elevated thyroid levels (hyperthyroidism) would typically present with symptoms like increased energy or restlessness.
B. Low blood glucose levels. Low blood glucose is not related to amiodarone. Symptoms of hypoglycemia include sweating, hunger, and confusion, not heat intolerance or fatigue.
C. Elevated blood glucose levels. Hyperglycemia is not a known side effect of amiodarone.
D. Low thyroid hormone levels. Amiodarone can induce hypothyroidism, which may cause fatigue and heat intolerance. Regular thyroid monitoring is recommended with long-term amiodarone use.
Correct Answer is A
Explanation
A. "I'll use my electric razor for shaving." This is correct as using an electric razor helps prevent cuts, which is important since warfarin increases bleeding risk.
B. "I'll be sure to eat foods with lots of vitamin K." Vitamin K reduces the effectiveness of warfarin; clients should be consistent with their intake of vitamin K to avoid fluctuations in INR.
C. "It's okay to have a couple of glasses of wine with dinner." Alcohol can increase the effect of warfarin and the risk of bleeding. Clients should avoid or limit alcohol intake.
D. "I'll take aspirin for my headaches." Aspirin also has anticoagulant effects and can increase bleeding risk when taken with warfarin.