A nurse is caring for a client with a possible acute myocardial infarction (AMI). The electrocardiogram (ECG) shows no ST segment elevations or depression. The nurse is aware that an elevation of which lab result will determine if there has been cardiac injury?
Elevated Troponins
Elevated Creatine kinase (CK)
Elevated Hemoglobin
Elevated B-type Natriuretic
The Correct Answer is A
Rationale:
A. Elevated Troponins indicate myocardial injury or infarction.
B. Elevated Creatine kinase (CK) is an enzyme found in skeletal muscle, brain, and myocardium. Elevated levels can indicate muscle damage.
C. Elevated Hemoglobin is not specific to cardiac injury.
D. Elevated B-type Natriuretic peptide (BNP) is used in the diagnosis and management of heart failure.
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Related Questions
Correct Answer is B
Explanation
Rationale:
A. Looking for P waves is important for assessing atrial activity, but it does not directly calculate heart rate.
B. Counting how many QRS complexes occur in a 6-second strip and multiplying by 10 is a quick and accurate way to calculate heart rate.
C. Reading the monitor or ECG interpretation provides information about the rhythm and morphology of the heart, but it does not directly calculate heart rate.
D. Measuring T waves is important for assessing cardiac repolarization, but it does not directly calculate heart rate.
Correct Answer is A
Explanation
Rationale:
A. Sudden weakness of one arm and leg may indicate a stroke, which is a potential complication of atrial fibrillation.
B. An irregular heart rate without P waves is characteristic of atrial fibrillation and is expected.
C. Cloudy and odorous urine may indicate a urinary tract infection but is not the priority in this case.
D. An aPTT of 80 seconds is within the therapeutic range for heparin therapy.
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