‘Is he losing his mind?’ A sudden case of amnesia

A 75-year-old man was brought to the office by his wife of 50 years for follow up after experiencing a very frightening event. The patient and his wife were exercising at a local health club 3 days ago for their usual 2-hour workout. They typically walk on the treadmill for about an hour and then stretch before lifting 10- to 15-lb weights. They have been doing this for about 3 days per week for