Rhabdomyolysis and D-dimer Elevation

Mechanism and Clinical Context

• D-dimer elevation in rhabdomyolysis is associated with the development of disseminated intravascular coagulation (DIC), characterized by widespread activation of coagulation and subsequent fibrinolysis, leading to markedly elevated D-dimer levels, as indicated by the Journal of Thrombosis and Haemostasis 1
• D-dimer specifically indicates crosslinked fibrin breakdown, which occurs when plasmin cleaves the fibrin mesh formed during DIC, releasing D-dimer fragments into circulation, according to Praxis Medical Insights 2

Differential Diagnosis and Monitoring

• When encountering elevated D-dimer in a patient with suspected or confirmed rhabdomyolysis, assess for DIC by checking complete blood count, coagulation studies, and fibrinogen levels alongside the D-dimer, as recommended by the Journal of Thrombosis and Haemostasis 1, 3
• Monitor for evolving DIC in severe rhabdomyolysis by tracking serial platelet counts, fibrinogen levels, and coagulation parameters, not just D-dimer alone, as suggested by the Journal of Thrombosis and Haemostasis 1, 3

Prognostic Implications

• The presence of DIC, confirmed by elevated D-dimer plus thrombocytopenia, prolonged PT/APTT, and low fibrinogen, indicates severe disease requiring aggressive supportive care and treatment of the underlying cause, according to the Journal of Thrombosis and Haemostasis 1, 3