A client came into the emergency room with a possible myocardial infarction. The provider orders a series of blood tests to be drawn, which lab should the nurse anticipate will be drawn?
Brain Natriuretic Peptide (BNP)
Total Lactate Dehydrogenase (LDH)
Troponin
Creatinine
The Correct Answer is C
A. Brain Natriuretic Peptide (BNP) is a marker for heart failure, not the primary diagnostic test for myocardial infarction (MI).
B. Total Lactate Dehydrogenase (LDH) was historically used but is not specific for MI and has been replaced by troponin testing.
C. Troponin is correct. Cardiac-specific troponins (Troponin I and Troponin T) are the gold standard for detecting myocardial injury. Elevated levels indicate myocardial damage and are crucial for diagnosing MI.
D. Creatinine is important for assessing kidney function but is not a marker for myocardial infarction.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Intermittent claudication with pallor is typically associated with peripheral artery disease (PAD) rather than myocardial infarction.
B. Jugular vein distention and dependent edema are signs of right-sided heart failure, which may develop after an MI but are not classic acute MI symptoms.
C. Mid-epigastric pain and heartburn can sometimes be confused with MI symptoms, but heartburn alone is not diagnostic of an MI.
D. Diaphoresis and cool clammy skin are correct. These symptoms occur due to sympathetic nervous system activation in response to cardiac ischemia, leading to vasoconstriction, sweating, and signs of impending shock.
Correct Answer is B
Explanation
A. Taking 4 tablets over 20 minutes exceeds the recommended limit of 3 doses in 15 minutes and can dangerously delay emergency care if the pain is due to a heart attack.
B. The correct teaching is to take 1 sublingual nitroglycerin tablet at the onset of angina and, if pain persists after 5 minutes, activate emergency services while taking up to 2 additional tablets at 5-minute intervals. This ensures rapid symptom relief while promptly initiating emergency care if the angina does not resolve.
C. Calling 911 before taking any nitroglycerin delays immediate treatment of angina. Sublingual nitroglycerin is meant to relieve pain quickly, so contacting emergency services comes after assessing response to the first dose.
D. Waiting until all 3 tablets are taken before calling 911 can dangerously delay care if the angina is progressing to myocardial infarction. Early activation after the first dose ensures patient safety and timely intervention.
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