15th March 2024

An 85-year-old woman presents with a two-day history of palpitations.

An 85-year-old woman presents with a two-day history of palpitations. She has hypertension, diabetes and asthma for which she is on lisinopril, metformin and salbutamol inhaler. On examination, her vitals are: HR 130, RR 18, BP 125/80, SpO2 97% on room air. Chest examination reveals normal heart sounds and a clear chest. An ECG is obtained:

Prescribe one drug that should be administered to control the patient’s heart rate.