<prompt> TRUE about Heparin Indiced Thrombocytopenia HIT syndrome are all, EXCEPT:LMWH shouldnt be used for treatmentIt causes both aerial and venous thrombosisMore common with fractionated heparinOccurs commonly in about a week of heparin therapy  <response>: Frequency of HIT after exposure to unfractionated heparin UFH is 1 to 5, whereas the frequency of HIT associated with the used of low-molecular-weight heparin LMWH is only 1. HIT occur due to the formation of antibodies against the complex of heparin bonded to platelet factor 4. Most patients develop HIT after exposure to heparin for 4 days but may occur suddenly in patients with recent exposure 100 days. It is paradoxically associated with increased risk of aerial and venous thrombosis. The 4 Ts have been recommended to be used in a diagnostic algorithm for HIT: thrombocytopenia, timing of platelet count drop, thrombosis and other sequel such as localized skin reactions, and other cause of thrombocytopenia not evident. 