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 A
Explanation
A. Pulseless ventricular tachycardia requires immediate defibrillation to restore a perfusing rhythm.
B. Antiarrhythmic medications are not typically effective for pulseless ventricular tachycardia as the heart is not effectively pumping blood.
C. Synchronized cardioversion is used for certain tachyarrhythmias with a pulse but is not appropriate for pulseless ventricular tachycardia.
D. A pacemaker is not indicated for pulseless ventricular tachycardia as it does not address the underlying issue of cardiac arrest.
Correct Answer is ["A","C","D","E"]
Explanation
A. The primary function of the kidneys is to filter blood and eliminate waste products as urine.
B. Vitamin B12 activation primarily occurs in the liver, not the kidneys.
C. The kidneys help regulate the body's acid-base balance by excreting or conserving bicarbonate ions and hydrogen ions.
D. The kidneys produce erythropoietin, a hormone that stimulates the production of red blood cells in the bone marrow.
E. The kidneys play a key role in regulating blood pressure by adjusting the volume of blood and the balance of electrolytes in the body. They also produce hormones such as renin, which helps regulate blood pressure.
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