A nurse is caring for a client who reports heart palpitations. An ECG confirms the client is experiencing ventricular tachycardia (VT). The nurse should anticipate the need for taking which of the following actions?
Elective cardioversion
Defibrillation
CPR
Radiofrequency catheter ablation
The Correct Answer is A
The correct answer is: A. Elective cardioversion
Choice A reason:
Elective cardioversion is a medical procedure that is used to restore a normal heart rhythm in patients experiencing certain types of arrhythmias, including ventricular tachycardia (VT), when they are stable. It involves the delivery of a controlled electric shock to the heart, which is synchronized with the heart's electrical activity to convert the abnormal rhythm back to a normal sinus rhythm. This procedure is typically performed when VT is not causing hemodynamic instability and the patient is not in immediate danger.
Choice B reason:
Defibrillation is an emergency treatment for life-threatening cardiac arrhythmias, particularly ventricular fibrillation (VF) or pulseless ventricular tachycardia. It involves delivering a high-energy electric shock to the heart unsynchronized to the heart's electrical cycle, aiming to reset the heart's electrical state and allow it to reestablish an effective rhythm. In the scenario provided, where the patient is experiencing VT but not VF, defibrillation would not be the first line of action unless the VT deteriorates into VF or the patient becomes pulseless.
Choice C reason:
CPR, or cardiopulmonary resuscitation, is a lifesaving technique useful in many emergencies, including heart attack or near drowning, in which someone's breathing or heartbeat has stopped. In the case of VT, if the patient is conscious and has a pulse, CPR is not indicated. CPR would only be necessary if the patient's heart stops beating (cardiac arrest) as a result of the VT.
Choice D reason:
Radiofrequency catheter ablation is a procedure used to treat some types of arrhythmias, including VT, by destroying the area of heart tissue that is causing the abnormal heart rhythm. This treatment is generally considered when medication is ineffective or not tolerated, or in recurrent VT. It is not typically the first line of treatment in an acute setting where the patient is stable and experiencing VT.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A: Provide a brightly lit environment is not an intervention that the nurse should take. A brightly lit environment can stimulate the brain and increase intracranial pressure. The nurse should provide a quiet and dimly lit environment to reduce sensory stimuli and promote rest.
Choice B: Elevate the head of the bed is an intervention that the nurse should take. Elevating the head of the bed to 30 degrees can help reduce intracranial pressure by facilitating venous drainage from the brain and decreasing cerebral blood volume. The nurse should avoid flexing or extending the neck, which can impede blood flow and increase intracranial pressure.
Choice C: Encourage a minimum intake of 2000 mL (67.6 oz) of clear fluids per day is not an intervention that the nurse should take. A high fluid intake can increase intracranial pressure by increasing blood volume and cerebral edema. The nurse should monitor fluid balance and restrict fluid intake as prescribed to maintain normal osmolality and prevent fluid overload.
Choice D: Teach controlled coughing and deep breathing is not an intervention that the nurse should take. Coughing and deep breathing can increase intrathoracic pressure, which can increase intracranial pressure by reducing venous return from the brain. The nurse should avoid activities that can increase intrathoracic pressure, such as straining, sneezing, or blowing the nose. The nurse should also administer oxygen as prescribed to maintain adequate oxygenation and perfusion of the brain.
Correct Answer is B
Explanation
Choice a) is incorrect because troponin is not an enzyme, but a protein. Enzymes are molecules that speed up chemical reactions in the body. Troponin does not have this function.
Choice b) is correct because troponin is a protein that binds to calcium and regulates the contraction of heart muscle fibers. When the heart muscle is injured, such as in a myocardial infarction, troponin leaks into the bloodstream and can be detected by a blood test. The higher the level of troponin, the more severe the damage to the heart.
Choice c) is incorrect because troponin does not help transport oxygen throughout the body. That function is performed by hemoglobin, which is a protein found in red blood cells.
Choice d) is incorrect because troponin is not a lipid, but a protein. Lipids are fats that are used for energy storage and cell membrane formation. Troponin does not have these roles.
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