The size of the cerebral embolism varies with each cardiac disorder and is important in determining the presentation of the underlying problem. Characteristic is the absence of warning signs or symptoms.
Small emboli may cause amaurosis fugax or a transient ischaemic attack
Larger emboli often cause cortical branch artery syndromes, such as Wernicke's aphasia or a homonymous hemianopia, a large subcortical infarction, or a pan-hemispheric stroke
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