Dr Debjit Chatterjee
Case
A 65-year-old woman called an ambulance for episodes of palpitation, chest pain and dizziness over the previous three to four days. She was known to suffer from paroxysmal atrial fibrillation (AF) for a while and was on flecainide 100 mg twice daily and rivaroxaban. She thought that the present palpitations were different from her usual occasional paroxysms of AF. Her echocardiogram in the past showed structurally normal heart with preserved left ventricular function. Her coronary angiogram five years ago showed normal coronary arteries. Ambulance crew recorded two electrocardiograms (ECGs) over a period of 20 minute