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 B
Explanation
A. This is partially correct but lacks the detail that the examination is done via an endoscope through the throat.
B. An endoscopic retrograde cholangiopancreatography (ERCP) involves the use of an endoscope to visualize and treat problems in the bile ducts, gallbladder, and pancreas.
C. This statement reflects a misunderstanding of the procedure, as ERCP does not involve shock waves to treat gallstones.
D. This statement also reflects a misunderstanding, as ERCP is primarily a diagnostic procedure and does not involve direct medication delivery to the gallbladder.
Correct Answer is ["A","B","C","D","E"]
Explanation
First, Hodgkin lymphoma (HL) is commonly characterized by painless lymphadenopathy and is not painful, as stated above. Secondly, HL is often characterized by a low-grade fever rather than a high fever. Third, the presence of Bence-Jones cells in a laboratory test is not associated with Hodgkin lymphoma but indicates multiple myeloma, a different type of cancer. Fourth, Hodgkin disease is indeed a form of cancer; it is a malignancy of the lymphatic system. The nurse's statement that it is "not really cancer" is incorrect and misleading. Fifth, palliative radiation therapy is typically used to relieve symptoms in advanced stages of cancer or non-curative scenarios. However, for stage 1 Hodgkin lymphoma, the treatment usually involves chemotherapy and/or radiation therapy with curative intent, not palliative. Joe's nurse should provide accurate information about the nature of Hodgkin's disease and its treatment options, which are based on the stage and specific characteristics of the lymphoma.
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