<prompt> Most common casue of acute aerial occlusion-Pulmonary emboliAtherosclerosis plaqueEmboli atrial fibrillationThrombosis of aneurysm  <response>: most common cause of acute aerial occlusion is emboli from from atrial fibrillation Due to a decline in the incidence of rheumatic hea disease, advances in cardiac surgery, and the widespread use of anticoagulation for aerial arrhythmias, generalized atherosclerosis resulting in thrombosis is the most common etiology of acute peripheral aerial occlusion Ref Davidson 23rd edition pg 450 