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  • Title: Asymptomatic deep venous thrombosis is associated with a low risk of post-thrombotic syndrome.
    Author: Persson LM, Lapidus LJ, Lärfars G, Rosfors S.
    Journal: Eur J Vasc Endovasc Surg; 2009 Aug; 38(2):229-33. PubMed ID: 19482491.
    Abstract:
    UNLABELLED: Post-thrombotic syndrome (PTS) is a well-recognized condition that develops after symptomatic deep venous thrombosis, but the clinical significance and late complications of asymptomatic deep venous thrombosis (ADVT) are unclear. OBJECTIVE: To determine whether ADVT following minor surgery affects venous function and contributes to the later development of PTS. PATIENTS/METHODS: The study included 83 patients operated on for Achilles tendon rupture; 38 patients with postoperative ADVT and 45 patients without (control group). The follow-up examinations five years after the operation comprised computerised strain-gauge plethysmography, colour duplex ultrasonography, clinical scoring of venous disease, and quality of life (QOL). RESULTS: Villalta scores, CEAP classification and QOL did not differ between groups. PTS (=Villalta score > or =5) was found in three ADVT patients (8%) and in two controls (4%). Ultrasonography revealed post-thrombotic changes in 55% of ADVT patients and in none of the controls. Deep venous reflux occurred in 22 ADVT patients and in three controls (P<0.001). There was no difference between groups in plethysmographic variables, demonstrating that the ultrasonographic abnormalities were of negligible haemodynamic significance. CONCLUSIONS: PTS is not a common sequel to ADVT after minor surgery. Although more than 50% of patients with ADVT developed post-thrombotic changes according to ultrasound, these changes did not result in haemodynamically significant venous dysfunction.
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