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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. A sinus tachycardia is characterized by a sinus P wave at a rate of more than 100 per minute followed by a narrow QRS complex unlike in the strip depicted above.
B. The above ECG strip shows a ventricular tachycardia based on the wide QRS with a rate more than 120 bpm, AV dissociation and the fusion beats.
C. A complete heart block is characterized by QRS complexes being conducted at their own rates and totally independent of the P wave.
D. An idioventricular rhythm is characterized by a slow regular ventricular rhythm with a rate less than 50 bpm unlike in the above strip. It also has a prolonged QRS interval with no P wave.
Correct Answer is B
Explanation
Rationale:
A. Alteplase (fibrinolytics) is used to dissolve clots in coronary arteries during an acute myocardial infarction (AMI).
B. IV Nitroglycerine is a vasodilator that dilates coronary blood vessels, increasing blood flow to the myocardium.
C. Metoprolol (beta blockers) are used to decrease heart rate, blood pressure, and myocardial oxygen demand.
D. IV Heparin is used to prevent further clot formation in coronary arteries during an acute myocardial infarction (AMI).
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