Risk factors include: Hypertension, diabetes, high blood fats (especially triglycerides), high homocysteine, cigarette smoking, alcohol abuse, drug abuse (especially sympathomimetic amines, like cocaine, speed), trauma (arterial dissection), arteritis or vasculitis (lupus, etc), vascular malformations (aneurysm, avm), emboli(distant blood clots from heart, or paradoxical like pfo), and genetic such as mthfr mutations.
Answered 3/26/2013
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