Which of the following diagnostic tools is used to measure ejection fraction in heart failure?
Electroencephalogram
KUB
Dexascan
Cardiac catheterization
The Correct Answer is D
A. Electroencephalogram (EEG) measures electrical activity of the brain, not cardiac function.
B. KUB (Kidneys, Ureters, Bladder) is an X-ray used to assess the urinary tract, not heart function.
C. Dexascan (DEXA) is used to measure bone density, unrelated to heart function.
D. Cardiac catheterization is an invasive diagnostic procedure that allows direct measurement of cardiac pressures and evaluation of coronary arteries. It can be used to assess cardiac function including ejection fraction, either directly or with adjunctive imaging like ventriculography. Additionally, echocardiography is commonly used non-invasively to measure ejection fraction but among the given options, cardiac catheterization is the correct answer
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Hyperthermia, increased thirst, and polyuria are not related to Cushing's Triad; these symptoms suggest other conditions such as diabetes insipidus.
B. Confusion, blurred vision, and dizziness are nonspecific symptoms and do not define Cushing’s Triad.
C. Cushing's Triad is a classic neurologic emergency that indicates increased intracranial pressure. It is characterized by the triad of bradycardia (slow heart rate), decreased or irregular respirations, and hypertension (high blood pressure). This response is the body’s attempt to maintain cerebral perfusion in the face of rising intracranial pressure.
D. Tachycardia, shallow respirations, and hypotension are not consistent with Cushing’s Triad.
Correct Answer is D
Explanation
A. Furosemide typically causes hypokalemia (low potassium), not hyperkalemia.
B. There is no such thing as a potassium allergy; this statement is incorrect.
C. Furosemide does not increase potassium levels; it promotes potassium excretion.
D. Furosemide is a loop diuretic that increases the excretion of potassium in urine, so patients often require potassium supplementation to prevent hypokalemia.
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