Syncope is a commonly encountered problem in the emergency department (ED), accounting for approximately 3% of presenting complaints. Clinical assessment of syncope can be challenging due to the diverse range of conditions which can precipitate the symptom. Annual mortality for patients presenting with syncope ranges from 0-12% and if the syncope is secondary to a cardiac cause then this figure rises to 18-33%. In ED it is paramount to accurately identify those presenting with syncope, especially those patients with an underlying cardiac aetiology and initiate appropriate management and refer them for further investigations. In 2018, the European Society of Cardiology (ESC) updated its guidelines with regards to diagnosing and managing patients with syncope. Here, we highlight considerations and development since the development of the ESC guidelines within various components of the work-up including: history, physical examination, investigations, risk stratification and novel biomarkers. We further discuss the emerging role of artificial intelligence in diagnosing cardiac syncope and postulate how wearable technology may transform evaluating cardiac syncope in ED.