Which electrolyte imbalance is most likely indicated by a peaked T wave on an ECG?
Hyperkalemia
Hypocalcemia
Hyponatremia
Hypomagnesemia
The Correct Answer is A
Rationale:
A tall, peaked T wave on an ECG is a classic sign of elevated potassium levels, which can progress to life-threatening arrhythmias if untreated.
B. Hypocalcemia is incorrect; it is associated with prolonged QT intervals and tetany, not peaked T waves.
C. Hyponatremia is incorrect; it typically causes neurologic symptoms (confusion, seizures) rather than characteristic ECG changes.
D. Hypomagnesemia is incorrect; it can cause prolonged QT and torsades de pointes, but not peaked T waves.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Rationale:
A. An obstruction of the common bile duct causes dark amber or tea-colored urine due to increased bilirubin excretion.
B. The gallbladder and common bile duct are located in the right upper quadrant, so pain is typically felt there.
C. Obstruction of the common bile duct prevents bile from reaching the intestines, impairing fat digestion and absorption, leading to steatorrhea (fatty, foul-smelling stools).
D. Ecchymosis is not a typical sign of common bile duct obstruction. It may indicate coagulation disorders, but it is unrelated to chronic cholecystitis.
Correct Answer is {"A":{"answers":"B"},"B":{"answers":"B"},"C":{"answers":"A"},"D":{"answers":"A"}}
Explanation
Rationale
- Advise strict bed rest → Contraindicated
Strict bed rest is not necessary unless the patient is severely compromised; mobility is encouraged to prevent complications.
- Encourage high-sodium diet → Contraindicated
A low-sodium diet is essential to reduce fluid retention and ascites; high sodium worsens edema.
- Administer diuretics as prescribed → Anticipated
Diuretics (e.g., spironolactone, furosemide) help reduce ascites and edema.
- Monitor abdominal girth daily → Anticipated
Helps track fluid accumulation and assess effectiveness of interventions.
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