A 75-year-old woman collapses while walking her dog and is brought to the emergency department. Past history includes long-standing aortic stenosis. S...

Question

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?

Accepted Answer

Mechanical outflow obstruction from critical aortic stenosis

Answer

Vasovagal syncope

Answer

Cardiac arrhythmia due to long QT syndrome

Answer

Psychogenic pseudosyncope

Answer

Postural hypotension from autonomic neuropathy

au-amc MCQ (SBA): Syncope due to aortic stenosis