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  • Title: Prognostic Significance of Concomitant Superficial Vein Thrombosis in Patients with Deep Vein Thrombosis of the Lower Limbs.
    Author: Dubois-Silva Á, Barbagelata-López C, Piñeiro-Parga P, Francisco I, Falgá C, Tirado R, Suriñach JM, Vela JR, Mella C, Quere I, Siniscalchi C, Monreal M, RIETE Investigators.
    Journal: Thromb Haemost; 2021 Dec; 121(12):1650-1659. PubMed ID: 33677826.
    Abstract:
    BACKGROUND: The prognostic significance of concomitant superficial vein thrombosis (SVT) in patients with lower-limb deep vein thrombosis (DVT) has not been consistently evaluated. METHODS: We used the RIETE (Registro Informatizado de Enfermedad TromboEmbólica) registry to compare the rates of subsequent pulmonary embolism (PE), recurrent DVT, major bleeding or death in patients with lower-limb DVT, according to the presence or absence of concomitant SVT. RESULTS: From March 2015 to May 2020, there were 8,743 patients with lower-limb DVT. Of these, 745 (8.5%) had concomitant SVT. Most patients (97.4% in both subgroups) received anticoagulant therapy (median duration: 138 vs. 147 days). During follow-up (median: 193 vs. 210 days), 156 (1.8%) patients developed subsequent PE, 336 (3.8%) had recurrent DVT, 201 (2.3%) had major bleeding and 844 (9.7%) died. Patients with concomitant SVT had a higher rate of subsequent PE (rate ratio [RR]: 2.11; 95% confidence interval [95%CI]: 1.33-3.24) than those with isolated DVT, with no significant differences in the rates of recurrent DVT (RR: 0.80; 95%CI: 0.50-1.21), major bleeding (RR: 0.77; 95%CI: 0.41-1.33) or death (RR: 0.81; 95%CI: 0.61-1.06). On multivariable analysis, patients with DVT and SVT concomitantly were at increased risk of subsequent PE during anticoagulation (adjusted hazard ratio [HR]: 2.23; 95%CI: 1.22-4.05) and also during the entire follow-up period (adjusted HR: 2.33; 95%CI: 1.49-3.66). CONCLUSION: Patients with lower-limb DVT and SVT concomitantly are at increased risk of developing PE. Further studies are needed to externally validate our findings and to determine if these patients could benefit from a different management strategy.
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