Cartoid massage was done, Next step? (454/1700)

A 65yo male presents with dyspnea and palpitations. Exam: pulse=170bpm, BP=120/80mmHg.
Carotid massage has been done as first instance. What is the next step of the management?
a. Adenosine
b. Amlodipine
c. DC cardioversion
d. Lidocaine
e. Beta blocker




























answer: A, adenosine if carotid massage failed
dx SVT