In patients with HIT, even those with the most severe thrombocytopenia, thrombosis rather than bleeding is the predominant clinical presentation, and the frequency of serious life- and limb-threatening TECs is high if untreated.2 It is estimated that thromboses occur in as many as 50% of patients with HIT, with high associated morbidity and mortality rates: 20% to 30% of these patients will die as a result of TECs, and an additional 21% will require limb amputation.1,6,7