This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiopulmonary Cerebral Resuscitation, Subject name: Anaesthesia
25-year-old female presented to emergency with palpitations and dizziness. ECG was done and was diagnosed supraventricular tachycardia. Her blood pressure was 60/40 mm Hg. First line of management for this patient is ? 
Select and explain. 
A. Adenosine 6 mg IV, B. Vagal manoeuvre, C. Cardioversion, D. Adenosine 12 mg IV
C: Cardioversion
Answer: C: Cardioversion 
Explanation: Supraventricular tachycardias with hemodynamic compromise should be treated with immediate synchronized cardioversion. Supraventricular tachycardias with no hemodynamic compromise: vagal maneuvers - if no response -iv adenosine 6 mg - if needed again adenosine 12 mg (after 1- 2mins)