Final answer:
During an episode of unstable ventricular tachycardia, the client should administer a prescribed antiarrhythmic medication, as instructed by healthcare providers, to help restore a normal heart rhythm.
Step-by-step explanation:
If a nurse is caring for a client with unstable ventricular tachycardia, the most appropriate action for the client to take during an episode, if prescribed, would be C) Administer a prescribed antiarrhythmic medication. Options such as increasing physical activity or consuming a caffeinated beverage would likely exacerbate the arrhythmia. Deep, slow breaths may be helpful for calming, but in the case of ventricular tachycardia, medical intervention is necessary. Antiarrhythmic medications, such as beta blockers, procainamide, or others, help restore a normal heart rhythm and are appropriate in managing arrhythmias.
Ventricular tachycardia signifies a fast heart rate that originates in the ventricles and can be life-threatening if not treated promptly. Medications, along with potential therapies like defibrillation or the implantation of a cardioverter defibrillator, can stabilize the heart's rhythm. In an emergency, a controlled electric shock (defibrillation) may be necessary to restore a stable heart rhythm.