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 C
Explanation
A. This meal is high in fat, which may be poorly tolerated after a cholecystectomy, as it can exacerbate symptoms such as diarrhea and abdominal discomfort.
B. This meal is high in fat and may be difficult to digest after a cholecystectomy.
Whole milk can also be rich in fat, which may not be well tolerated.
C. This meal is lower in fat and includes easily digestible foods such as roast turkey and rice, which are generally well tolerated after a cholecystectomy. Gelatin dessert provides a light and refreshing option for dessert without adding excess fat.
D. This meal is high in fat, which may be poorly tolerated after a cholecystectomy, as it can exacerbate symptoms such as diarrhea and abdominal discomfort.
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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