01
True or false
1 point
True or false: Peaked T waves are a typical ECG finding of severe hypokalemia.
Free Practice Quiz Question List
3 Severe Potassium Abnormalities Online Quiz Questions
Use this free practice quiz with 20 questions to review 3 Severe Potassium Abnormalities, test your knowledge, and prepare for your next test or exam.
20 questions
02
Fill in the blank
1 point
In hypokalemia, ECG findings can include and .
03
Written response
1 point
A hospitalized patient with severe hypokalemia and ECG changes cannot take oral medication. What type of monitoring should accompany IV potassium replacement?
04
Choose one
1 point
A patient with hypokalemia remains potassium-depleted despite replacement, and laboratory testing shows magnesium deficiency. Which additional step is appropriate?
- A
Stop potassium replacement because the ECG is abnormal.
- B
Check for magnesium deficiency and correct it if present.
- C
Give potassium only in dextrose-containing fluid.
- D
Give an unmonitored IV potassium bolus.
05
Choose all
1 point
A patient with severe hypokalemia and ECG changes requires IV potassium. Select all appropriate aspects of the care plan.
- A
Use cardiac monitoring during IV replacement.
- B
Give potassium as a rapid, unmonitored IV bolus.
- C
Recheck the potassium level.
- D
Correct magnesium deficiency if present.
06
Written response
1 point
A patient with hyperkalemia develops ECG changes associated with cardiac toxicity. What treatment is used urgently to stabilize the myocardium?
07
True or false
1 point
True or false: A normal ECG reliably rules out dangerous hyperkalemia in a patient with a markedly elevated potassium level.
- A
True
- B
False
08
Fill in the blank
1 point
As hyperkalemia progresses and cardiac conduction slows, the ECG may show before a severe sine-wave pattern.
09
Choose one
1 point
A patient with acute kidney injury has newly recognized hyperkalemia. Which ECG finding is a classic early change?
- A
Tall, narrow-based peaked T waves
- B
Prominent U waves
- C
Flattened T waves with ST-segment depression
- D
Delta waves with a shortened PR interval
10
Choose one
1 point
A patient with severe hyperkalemia has a widening QRS and no visible P waves. Which immediate treatment plan is most appropriate?
- A
Give IV calcium for myocardial stabilization and also initiate potassium-lowering measures.
- B
Give IV calcium alone because it removes potassium from the body.
- C
Wait for an oral potassium binder to correct the ECG before treating further.
- D
Withhold treatment until a repeat potassium result regardless of the ECG.
11
Choose all
1 point
A patient with severe hyperkalemia has ECG changes. Select all treatment components that address the urgent priorities described for this situation.
- A
Use IV calcium to reduce myocardial toxicity.
- B
Use insulin with glucose as a potassium-shifting treatment.
- C
Rely on IV calcium alone to remove potassium from the body.
- D
Arrange potassium removal when appropriate.
12
Open ended
1 point
Compare the urgent management of severe hypokalemia with ECG changes and severe hyperkalemia with ECG changes. Explain the role of IV treatment and monitoring in each, including why IV calcium alone is not sufficient for hyperkalemia.
13
Choose one
1 point
For IV potassium replacement, which routine infusion-rate ceiling is generally recommended?
- A
2 mmol/hour
- B
10 mmol/hour
- C
25 mmol/hour
- D
50 mmol/hour
14
True or false
1 point
Classic hyperkalemia ECG changes appear in a fixed sequence at the same potassium level in every patient.
- A
True
- B
False
15
Written response
1 point
For routine IV potassium replacement, what infusion rate should generally not be exceeded?
16
Written response
1 point
Which associated electrolyte deficiency should be checked and corrected because it can make potassium depletion difficult to correct?
17
Choose one
1 point
A patient with prolonged vomiting has severe hypokalemia, muscle weakness, ST-segment depression, flattened T waves, and prominent U waves. Which serious complication is a particular concern?
- A
Ventricular arrhythmia
- B
Peaked T waves progressing to a sine-wave pattern
- C
A shortened PR interval as the characteristic early finding
- D
Increased risk of hypercalcemia
18
Choose one
1 point
A hospitalized patient has severe hypokalemia with ECG changes and cannot take oral medication. Which approach is most appropriate?
- A
Delay potassium replacement until the ECG normalizes.
- B
Give IV potassium under cardiac monitoring and recheck the potassium level.
- C
Give potassium as a rapid, unmonitored IV bolus.
- D
Use dextrose-containing fluid as the preferred potassium-replacement vehicle.
19
Choose one
1 point
A patient with acute kidney injury has markedly elevated potassium. Which sequence best describes classic progressive hyperkalemia ECG changes?
- A
Prominent U waves → flattened T waves → prolonged QT
- B
Shortened PR → delta waves → narrow QRS
- C
Peaked T waves → prolonged PR and reduced P-wave amplitude → widened QRS → sine-wave pattern
- D
ST elevation → pathologic Q waves → U waves
20
Choose one
1 point
After insulin with glucose is used to treat severe hyperkalemia, what should be monitored because of a potential treatment complication?
- A
Monitor blood glucose because hypoglycemia can occur after insulin.
- B
Avoid glucose monitoring because insulin cannot lower blood glucose in this setting.
- C
Give potassium to prevent hypoglycemia.
- D
Use IV calcium as a substitute for glucose monitoring.
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