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?
A.
Elective cardioversion
B.
Defibrillation
C.
CPR
D.
Radiofrequency catheter ablation
The Correct Answer and Explanation is:
The correct answer is B. Defibrillation.
Explanation:
Ventricular tachycardia (VT) is a serious and potentially life-threatening arrhythmia characterized by a rapid heart rate originating from the ventricles. This condition can lead to decreased cardiac output and, if persistent or symptomatic, can progress to more severe arrhythmias like ventricular fibrillation (VF) or result in sudden cardiac death.
Defibrillation is a crucial intervention for managing VT, especially when it is sustained, symptomatic, or the patient is unstable. Here’s why defibrillation is the appropriate choice:
- Nature of VT: VT involves a rapid and abnormal heartbeat originating from the ventricles. If the VT is sustained and the patient is symptomatic, it can compromise cardiac output and cause severe symptoms such as dizziness, shortness of breath, chest pain, or loss of consciousness. Defibrillation is used to reset the heart’s electrical activity by delivering a high-energy shock, which can restore a normal rhythm.
- Clinical Stability: For stable patients with VT (i.e., those who are asymptomatic or have minimal symptoms), antiarrhythmic medications or electrical cardioversion might be considered. However, if the patient is unstable (experiencing symptoms or has deteriorating hemodynamics), immediate defibrillation is necessary to prevent further deterioration.
- Comparison with Other Options:
- Elective cardioversion (A): This is usually used for patients with atrial arrhythmias or stable VT and is not the first-line treatment for unstable VT. It involves a synchronized shock, typically used for atrial fibrillation or flutter, not for immediate life-threatening ventricular arrhythmias.
- CPR (C): While CPR is critical for patients in cardiac arrest or when there is no pulse, it is not the immediate treatment for VT unless the patient has progressed to cardiac arrest.
- Radiofrequency catheter ablation (D): This is a long-term treatment option used to target and destroy abnormal electrical pathways in the heart that cause arrhythmias. It is not used in acute situations where immediate intervention is required.
In summary, defibrillation is the immediate intervention needed for unstable VT to quickly restore normal cardiac rhythm and prevent serious complications.