A nurse is reviewing the lab results and electrocardiogram (ECG) of a patient with End Stage Renal Disease (ESRD). The nurse correlates which ECG finding to a potassium level of 6.8?
Prolonged PR interval
Presence of a U wave
Peaked T waves
Elevated ST segment
The Correct Answer is C
A. A prolonged PR interval can be seen in hyperkalemia but is not as characteristic as peaked T waves.
B. A U wave is typically seen in hypokalemia, not hyperkalemia.
C. Peaked T waves are a hallmark ECG finding in hyperkalemia and occur due to increased repolarization speed.
D. ST segment elevation is more commonly associated with myocardial infarction rather than hyperkalemia.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Salt substitutes often contain potassium and should be avoided in hyperkalemia.
B. While assessing other electrolytes may be useful, the immediate concern is evaluating the effects of hyperkalemia on cardiac function.
C. Citrus fruits and bananas are high in potassium and should be avoided when potassium levels are elevated.
D. A 12-lead ECG is essential to assess for cardiac dysrhythmias, as hyperkalemia can cause life-threatening arrhythmias such as peaked T waves and widened QRS complexes.
Correct Answer is A
Explanation
A. A murmur is the expected heart sound in mitral valve regurgitation, caused by the backflow of blood into the left atrium during systole. It is typically a holosystolic murmur heard best at the apex of the heart.
B. S3 and S4 heart sounds may be heard in heart failure but are not specific for mitral regurgitation.
C. A friction rub is associated with pericarditis, not valvular disease.
D. A click is typically heard in mitral valve prolapse, not mitral regurgitation.
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