10th May 2025

A 33-year-old female came to A&E with recurrent syncope.

A 33-year-old female came to A&E with recurrent syncope. She gave a history of brief loss of consciousness lasting less than a minute. There is no history of tongue bite, limb jerking or incontinence. She does not give any history of prodrome, chest pain or palpitation. These episodes occur very rarely, and previously she had one episode 2 years back. Triage notes revealed, HR- 77/min, BP- 130/80 mmHg with no postural drop, SpO2- 98% in room air, blood glucose- 5.5mmol/L. ECG showed sinus rhythm with normal heart rate. Bloods including urea and electrolytes were within normal limits. Precordium auscultation revealed no murmur.

What is the best choice of investigation for her?

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