5th May 2025

A 45-year-old man presents to his GP with a month’s history of flushing, headaches, weight loss of 5kg, anxiety and palpitations.

A 45-year-old man presents to his GP with a month’s history of flushing, headaches, weight loss of 5kg, anxiety and palpitations. He has no previous medical history. His mother had type 1 diabetes and thyroid problems. He states he drinks a bottle of red wine a week and does not use any recreational drugs. His blood pressure in clinic is 195/65. An ECG shows an irregularly irregular rhythm. What is the best test to ascertain the most likely cause for this gentleman’s arrhythmia?

Select the SINGLE most appropriate option from the list below. Select ONE option only.