This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': 'Adenosine is used in \nSelect and explain. \nA. Atrial flutter, B. Atrial fibrillation, C. PSVT, D. Ventricular tachycardia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Acute management of narrow QRS PSVT is guided by the clinical presentation. Continuous ECG monitoring should be implemented.For stable individuals, initial therapy takes advantage of the fact that most PSVTs are dependent on AV nodal conduction (AV nodal reentry or ohodromic AV reentry) and therefore likely to respond to sympatholytic and vagotonic maneuvers and drugs (IV adenosine)Harrison 19e pg: 1483', 'role': 'assistant'}]