The association of D-dimer levels with clinical outcomes in patients presenting with acute pulmonary embolism.
The D-dimer fragment of fibrin degradation has been a useful adjunct in the diagnosis of venous thromboembolism (VTE). In conjunction with predictive algorithms, the high negative predictive value (NPV) of D-dimer measurements has provided this analyte with a prominent position in the diagnosis of pulmonary embolism (PE). The purpose of this study was to determine if D-dimer levels correlate with ventilation/perfusion (V/Q) derangements as assessed by the alveolar-arterial oxygen tension gradient (DeltaA-a) and to ascertain if quantitative measurements of D-dimer on admission have prognostic value in terms of during-admission mortality and recurrence over a 60-week period. The study utilized a retrospective cohort of 108 subjects admitted to a single institution and studied longitudinally. The cohort was divided into 4 groups representing degree of severity assessed by computed tomographic (CT) angiography: mild, moderate, severe, and very severe. Differences in D-dimer levels among these groups were strongly significant (P < .0001). A strong correlation was observed between D-dimer concentration and DeltaA-a (P < .0001). Logistic methods were used to calculate a "cut-off" level that would distinguish mild-moderate from severe-very severe PE. At a concentration of 12.35 mug/mL, this level yielded an odds ratio (OR) of 12.64 (P = .006) for during-admission mortality and a hazard ratio (HR) of 0.13 (P < .0001) for 60-week recurrence. These data suggest that D-dimer levels have utility beyond their NPV and should be considered as potential prognostic markers in subjects presenting with acute PE.
Blamoun
John
J
Department of Medicine, St. Joseph's Regional Medical Center, Paterson, NJ, USA.
Alfakir
Maria
M
Sedfawy
Ashraf I R
AI
Moammar
Mahmoud Q
MQ
Maroules
Michael
M
Khan
M Anees
MA
DeBari
Vincent A
VA
D000208:Acute Disease; D005338:Fibrin Fibrinogen Degradation Products / Q000032:analysis*; D017052:Hospital Mortality; D006801:Humans; D008137:Longitudinal Studies; D011379:Prognosis; D011655:Pulmonary Embolism / Q000175:diagnosis*; D012008:Recurrence; D012129:Respiratory Function Tests; D014054:Tomography; D016896:Treatment Outcome
D005338:Fibrin Fibrinogen Degradation Products; C036309:fibrin fragment D