A nurse is reviewing the EKG strip of a client who is hypertensive and is complaining of muscle weakness. Which of the following abnormalities on the clients EKG should the nurse interpret as a sign of hyperkalemia?
Peaked T waves
Inverted P waves
Widened QRS
Prominent U wave
The Correct Answer is A
A) Peaked T waves:
Peaked T waves are a classic sign of hyperkalemia on an EKG. As potassium levels rise, the T waves become taller, more pointed, and narrow, indicating changes in the heart's electrical conduction. This is one of the earliest and most characteristic EKG changes seen with hyperkalemia. Hyperkalemia can result from conditions such as kidney dysfunction, use of potassium-sparing diuretics, or other electrolyte imbalances.
B) Inverted P waves:
Inverted P waves typically suggest issues such as atrial ischemia or ectopic atrial rhythms but are not a hallmark sign of hyperkalemia. They may also appear with other conditions, like atrial fibrillation or atrial flutter. However, inverted P waves are not typically linked to elevated potassium levels.
C) Widened QRS:
A widened QRS complex can occur in several conditions, including hyperkalemia, but it is generally seen in more severe cases. As potassium levels rise further, the QRS complex may widen due to delayed conduction through the ventricles. Although a widened QRS can indicate hyperkalemia, it is a later sign, and it typically occurs after more specific changes like peaked T waves.
D) Prominent U wave:
Prominent U waves are more often associated with hypokalemia (low potassium levels) rather than hyperkalemia. U waves are typically seen after the T wave on the EKG and can be more prominent in conditions of low potassium.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A) Assess for dislodgement and use forceps to retrieve the dislodged pellets and place in the lead container:
The priority action when a patient is receiving brachytherapy for uterine cancer is to assess for potential dislodgement of the radioactive implant. If the radiation source has been displaced, it must be handled carefully to prevent radiation exposure to the nurse, other patients, and staff. The nurse should use forceps to carefully retrieve the dislodged pellets and place them in a lead container to prevent contamination.
B) Assess the patient's knowledge of the treatment plan and her willingness to participate:
While it is important to assess the patient's understanding of the treatment plan and her willingness to participate, this is not the immediate priority in this situation. The nurse’s first priority is to address the potential risk of radiation exposure due to the dislodgement of the implant.
C) Assess the UAP's knowledge and explain the rationale for strict bed rest:
Although it is important for the nurse to ensure that all team members, including UAPs, understand the rationale for strict bed rest during brachytherapy, this action is not the most immediate priority in this scenario. The potential dislodgement of the radiation implant requires urgent assessment and intervention.
D) Notify the physician about the potential dislodgment of the radiation implant:
Notifying the physician about the dislodgement is an important step, but it is not the first action the nurse should take. The immediate priority is to assess and secure the radiation implant using appropriate protocols. Once the dislodged pellets have been safely contained in the lead container, the nurse should then notify the physician for further guidance on the next steps in treatment or care.
Correct Answer is D
Explanation
A) Sodium 136 mEq/L:
A sodium level of 136 mEq/L is within the normal reference range of 135–145 mEq/L. While clients with heart failure may experience fluid shifts and altered sodium levels, this result does not immediately require reporting to the provider. Sodium at this level is considered normal.
B) Potassium 4.5 mEq/L:
A potassium level of 4.5 mEq/L is within the normal range of 3.5–5.0 mEq/L, making it a safe and appropriate level. There is no immediate concern regarding potassium levels here, so no action is required. This value does not need to be reported to the provider.
C) Calcium 10 mg/dL:
The normal range for calcium is generally between 8.5–10.5 mg/dL. A calcium level of 10 mg/dL is within this normal range, so this finding does not require further action. No reporting is necessary to the provider.
D) Potassium 2.9 mEq/L:
A potassium level of 2.9 mEq/L is below the normal range (3.5–5.0 mEq/L) and is considered hypokalemia. Furosemide is a loop diuretic that can cause potassium depletion by increasing renal excretion of potassium. This is a serious concern because hypokalemia can lead to dangerous cardiac arrhythmias, muscle weakness, and other complications. The nurse should immediately report this low potassium level to the provider so that potassium supplementation or adjustments in diuretic therapy can be made.
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