What is seen on an ECG tracing when there is no electrical activity being produced?
Negative waveform
Isoelectric line
Downward deflection
Positive waveform
The Correct Answer is B
A. A negative waveform indicates a downward deflection from the baseline on an ECG tracing, which may correspond to electrical activity such as depolarization or repolarization of cardiac chambers.
B. An isoelectric line represents the baseline on an ECG tracing when there is no net electrical activity occurring in the heart. It appears flat and represents a period of electrical silence.
C. A downward deflection on an ECG tracing refers to a negative waveform, as mentioned above.
D. A positive waveform on an ECG tracing indicates an upward deflection from the baseline, representing electrical activity such as depolarization or repolarization.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. A specific gravity within the normal range indicates adequate urine concentration and hydration status, which is not typically concerning.
B. This color is indicative of normal urine concentration and hydration status and is not necessarily indicative of urinary tract pathology.
C. Absence of glucose in the urine is a normal finding and does not typically warrant further investigation.
D. Microscopic hematuria (blood in the urine not visible to the naked eye) may indicate underlying urinary tract pathology, such as infection, inflammation, or kidney stones, and should be reported to the provider for further evaluation and management.
Correct Answer is D
Explanation
A. Heat application may provide comfort for localized pain but does not address the underlying cause of hypercalcemia, which requires systemic management.
B. While rest may be beneficial for certain conditions, it does not directly address hypercalcemia. Encouraging mobility and adequate fluid intake is typically more effective.
C. Coughing and deep breathing exercises are important for preventing respiratory complications after surgery but are not relevant for managing hypercalcemia.
D. Increasing fluid intake promotes hydration and enhances urinary calcium excretion, helping to lower serum calcium levels and minimize complications associated with hypercalcemia
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