Q1. A 16 year old male with a history of hay fever presents to the emergency department complaining of palpitations and dizziness. He has always been healthy and had no prior cardiac issues. The ECG rhythm strip is shown below. What is the likely cause?
A. Surreptitious ingestion of ethanol
B. Use of marijuana
C. Diphenhydramine
D. Smoking
E. Use of salbutamol
