MRCP2-3472
An 85-year-old male presents as a blue light ambulance call with a sudden onset inability to move his right side that has been ongoing for twelve hours. Upon examination, there is an expressive and receptive dysphasia accompanied by a dense right sensorimotor syndrome. The cardiovascular examination is unremarkable except for an irregular heartbeat at 80 per minute. A hyperacute CT head reveals a large area of ischaemia in the left middle cerebral artery vascular territory. The patient is not eligible for thrombolysis and is started on 300mg aspirin. A subsequent echocardiogram shows a 60% ejection fraction with no mural thrombus, while a carotid Doppler reveals 40% left and 35% right stenosis. A 24-hour tape demonstrates new atrial fibrillation. What measures can be taken to reduce the risk of future strokes?