An 8 month old female child presented to emergency with a hea rate of 220/minute and features of cogestive hea failure. Her hea rate comes down to normal after administering intravenous adenosine. What is the most likely diagnosis ?: (A) Atrial fibrillation, (B) Atrial flutter, (C) Paroxysmal supraventricular tachycardia, (D) Ventricular tachycardia
Answer is C. Most common indication of adenosine is paroxysmal supra ventricular tachycardia Ref : Harrison principals and practice of internal medicine, 19th edition, p.no:1479