Clinical features	Embolus	Thrombosis
Severity	Complete (no  collaterals)	Incomplete  (collaterals)
Onset	Seconds or minutes	Hours or days
Limb affected	Leg 3:1 arm	Leg 10:1 arm
Multiple sites	Up to 15%	Rare
Embolic source	Present (usually atrial  fibrillation)	Absent
Previous claudication	Absent	Present
Palpation of artery	Soft, tender	Hard, calcified
Bruits	Absent	Present
Contralateral leg pulses	Present	Absent
Diagnosis	Clinical	Angiography
Treatment	Embolectomy, warfarin	Medical, bypass,  thrombolysis