Open Access
Review

Table 1

Illustration of heparin resistance mechanism.

Antithrombin deficiency
Congenital Acquired
Reduced levels of AT Decreased synthesis (e.g., liver disease, malnutrition).
Reduced synthesis and or stability secondary to the gene mutations [15, 16] Increased clearance (e.g., nephrotic syndrome)
Functionally defective AT Increased consumption (heparin therapy)
Mutations leading to reduced activity Upregulated haemostatic system (sepsis, infective endocarditis, DIVC, DVT, PE)
ECMO, IABP
Medications (e.g., asparaginase) [17]

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