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at 12:04 a.m. Jan, 24, 2026
by
Ahmed7
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#AK_Step1_v12::#NinjaNerd::06_Cardiovascular::04_Pharmacology::03_Heparin_(MOA,_Indications,_ADR,_CI)
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What is the likely diagnosis in a patient that presents 5 days post-CABG with large, purple-black patches surrounded by erythema in the left thigh by sites of heparin injection?

{{c1::Heparin-induced thrombocytopenia (HIT)}}

Extra

Photo credit: Hindawi [https://www.hindawi.com/journals/crihem/2013/849168/]
- HIT should be suspected if there is a drop in platelets by > 50% or a new thrombus within 5-10 days of heparin initiation (may occur earlier in patients previously exposed to heparin)
- Formerly called "type 2 HIT"

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