Question category: Cardiology
A 22 year old female has been suffering from intermittent palpitations. She states these occur about four times a year and she is finding them increasingly troublesome. A 24 hour ECG is organised and she is found to have paroxysmal atrial fibrillation. She is fit and well otherwise. She was commenced on a beta blocker however could not tolerate the side effects as she was having vivid dreams which were disturbing her sleep. Which of the following could be utilised as an alternative?