Stroke

Emboli are responsible for approximately 20% of all ischemic strokes; they may be either cardiac or arterial in origin. Cardiac sources include atrial fibrillation, recent myocardial infarction (1-3% of all AMI), prosthetic valves, native valvular disease, endocarditis, mural thrombi, or dilated cardiomyopathy. Embolic strokes usually have a very sudden onset, and neuroimaging may demonstrate previous infarcts in several vascular territories.

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