EasyCardiologySyncope due to aortic stenosisau-amcau-racp
A 75-year-old woman collapses while walking her dog and is brought to the emergency department. Past history includes long-standing aortic stenosis. She quickly regains consciousness and has a normal blood glucose. ECG shows sinus rhythm without ischaemic changes. Which of the following is the most likely cause of her syncope?