Semin intervent Radiol 2001; 18(2): 083-098
DOI: 10.1055/s-2001-15170
Copyright © 2001 by Thieme Medical Publishers, Inc., 333 Seventh Avenue, New York, NY 10001, USA. Tel.: +1(212) 584-4662

The Natural History of Acute Deep Venous Thrombosis

Mark H. Meissner
  • Department of Surgery, University of Washington School of Medicine, Seattle, Washington
Further Information

Publication History

Publication Date:
31 December 2001 (online)

ABSTRACT

An understanding of the pathophysiology and natural history of deep venous thrombosis (DVT) is important in optimizing acute therapy and minimizing long-term complications. It is clear that DVT usually arises from the simultaneous convergence of multiple risk factors, both congenital and acquired, and that activated coagulation underlies many of these episodes. The role of venous injury is becoming understood at the endothelial level, and the importance of stasis has been redefined with respect to its role in localizing activated coagulation products. The early natural history of DVT is a balance between processes tending to restore the venous lumen and recurrent thrombotic events. Long-term outcome is directly influenced by these early events. Although few presenting features of DVT reliably predict long-term outcome, factors related to the natural history, including the rate of recanalization, recurrent thrombotic events, the extent and distribution of valvular incompetence, and residual popliteal obstruction, are important. The natural history of DVT potentially can be modified by careful attention to the intensity and duration of anticoagulation and the use of adjunctive measures such as compression stockings and catheter-directed thrombolytic therapy.

REFERENCES

  • 1 Coon W W, Willis P W, Keller J B. Venous thromboembolism and other venous disease in the Tecumseh Community Health Study.  Circulation . 1973;  48 839-846
  • 2 Anderson F A, Wheeler H B, Goldberg R J. A population-based perspective of the hospital incidence and case-fatality rates of deep vein thrombosis and pulmonary embolism.  Arch Intern Med . 1991;  151 933-938
  • 3 Rosendaal F R. Venous thrombosis: a multicausal disease.  Lancet . 1999;  353 1167-1173
  • 4 Oger E, Leroyer C, Le Moigne E. The value of risk factor analysis in clinically suspected deep venous thrombosis.  Respiration . 1997;  64 326-330
  • 5 van Boven H H, Vandenbroucke J P, Rosendaal F R. Gene-gene and gene-environment interactions determine risk of thrombosis in families with inherited antithrombin deficiency.  Blood . 1999;  94 2590-2594
  • 6 Bloemenkamp K WM, Rosendaal F R, Helmerhorst F M, Buller H R, Vanderbroucke J P. Enhancement by factor V Leiden mutation of risk of deep-vein thrombosis associated with oral contraceptives containing a third generation progestogen.  Lancet . 1995;  346 1593-1596
  • 7 Vandenbroucke J P, Helmerhorst F M, Bloemenkamp K W, Rosendaal F R. Third-generation oral contraceptive and deep venous thrombosis: from epidemiologic controversy to new insight in coagulation.  Am J Obstet Gynecol . 1997;  177 887-891
  • 8 Helmerhorst F M, Bloemkamp K WM, Rosendaal F R, Vendenbrouke J P. Oral contraceptives and thrombotic disease: risk of venous thromboembolism.  Thromb Haemost . 1997;  78 327-333
  • 9 Amiral J, Fareed J. Thromboembolic diseases: biochemical mechanisms and new possibilities of biological diagnosis.  Semin Thromb Hemost . 1996;  22(Suppl 1) 41-48
  • 10 Bertina R M, Koeleman B PC, Koster T. Mutation in blood coagulation factor V associated with resistance to activated protein C.  Nature . 1994;  369 64-67
  • 11 Makris M, Rosendall F R, Preston F E. Familial thrombophilia: genetic risk factors and management.  J Intern Med . 1997;  242(Suppl 740) 9-15
  • 12 Dahlback B. Inherited thrombophilia: resistance to activated protein C as a pathogenic factor of venous thromboembolism.  Blood . 1995;  85 607-614
  • 13 Hillarp A, Zoller B, Svensson P J, Dahlback B. The 20210 A allele of the prothrombin gene is a common risk factor among Swedish outpatients with verified deep venous thrombosis.  Thromb Haemost . 1997;  78 990-992
  • 14 Winkler U H, Holscher T, Schulte H, Ziereyn J P, Collett W, Schindler A E. Ethinyl estradiol 20 versus 30 mg combined with 150 mg desogestrel: a large comparative study of the effects of two low-dose oral contraceptives on the hemostatic system.  Gynecol Endocrinol . 1996;  10 265-271
  • 15 Meijers J C, Tekelenburg W L, Bouma B N, Bertina R M, Rosendaal F R. High levels of coagulation factor XI as a risk factor for venous thrombosis.  N Engl J Med . 2000;  342 696-701
  • 16 Prins M H, Hirsch J. A critical review of the evidence supporting a relationship between impaired fibrinolytic activity and venous thromboembolism.  Arch Intern Med . 1991;  151 1721-1731
  • 17 Schafer A I. Hypercoagulable states: molecular genetics to clinical practice.  Lancet . 1994;  344 1739-1742
  • 18 Nachman R L, Silverstein R. Hypercoagulable states.  Ann Intern Med . 1993;  119 819-827
  • 19 Bauer K A, Rosenberg R D. The pathophysiology of the prethrombotic state in humans: insights gained from studies using markers of hemostatic system activation.  Blood . 1987;  70 343-350
  • 20 Boisclair M D, Ireland H, Lane D A. Assessment of hypercoagulable states by measurement of activation fragments and peptides.  Blood Rev . 1990;  4 25-40
  • 21 Tardy B, Tardy-Poncet B, Bara L. Effects of long travels in sitting position in elderly volunteers on biologic markers of coagulation activity and fibrinolysis.  Thromb Res . 1996;  83 153-160
  • 22 Kambayashi J, Sakon M, Yokota M, Shiba E, Kawasaki T, Mori T. Activation of coagulation and fibrinolysis during surgery, analyzed by molecular markers.  Thromb Res . 1990;  60 157-167
  • 23 Kluft C, Verheijen J H, Jie A FH. The post-operative fibrinolytic shutdown: a rapidly reverting acute phase pattern for the fast-acting inhibitor of tissue-type plasminogen activator after trauma.  Scand J Clin Lab Invest . 1985;  45 605-610
  • 24 von Kaulla E, Droegemueller W, Aoki N, von Kaulla N K. Antithrombin III depression and thrombin generation acceleration in women taking oral contraceptives.  Am J Obstet Gynecol . 1971;  109 868-873
  • 25 Quehenberger P, Loner U, Kapiotis S. Increased levels of activated factor VII and decreased plasma protein S activity and circulating thrombomodulin during use of oral contraceptives.  Thromb Haemost . 1996;  76 729-734
  • 26 Falanga A, Ofosu F A, Oldani E. The hypercoagulable state in cancer patients: evidence for impaired thrombin inhibitions.  Blood Coagul Fibrinolysis . 1994;  5(Suppl 1) S19-S23
  • 27 Koenigs K P, McPhedran P, Spiro H M. Thrombosis in inflammatory bowel disease.  J Clin Gastroenterol . 1987;  9 627-631
  • 28 Vecchi M, Cattaneo M, de Franchis R, Mannucci P M. Risk of thromboembolic complications in patients with inflammatory bowel disease. Study of hemostasis measurements.  Int J Clin Lab Res . 1991;  21 165-170
  • 29 Thomas D P, Merton R E, Wood R D, Hockley D J. The relationship between vessel wall injury and venous thrombosis: an experimental study.  Br J Haematol . 1985;  59 449-457
  • 30 Wessler S. Thrombosis in the presence of vascular stasis.  Am J Med . 1962;  33 648-666
  • 31 Aronson D L, Thomas D P. Experimental studies on venous thrombosis: effect of coagulants, procoagulants and vessel contusion.  Thromb Haemost . 1985;  54 866-870
  • 32 Carter C J, Anderson F A, Wheeler H B. Epidemiology and pathophysiology of venous thromboembolism. In: Hull RD, Raskob GE, Pineo GF, eds. Venous Thromboembolism: An Evidence-Based Atlas Armonk, NY: Futura Publishing Co., Inc. 1996: 3-20
  • 33 Nawroth P P, Handley D A, Esmon C T, Stern D M. Interleukin 1 induces endothelial cell procoagulant while supressing cell-surface anticoagulant activity.  Proc Natl Acad Sci U S A . 1986;  83 3460-3464
  • 34 Stewart G J. Neutrophils and deep venous thrombosis.  Haemostasis . 1993;  23(Suppl 1) 127-140
  • 35 Thomas D. Venous thrombogenesis.  Br Med Bull . 1994;  50 803-812
  • 36 Merton R E, Hockley D, Gray E, Poole S, Thomas D P. The effect of interleukin 1 on venous endothelium-an ultrastructural study.  Thromb Haemost . 1991;  66 725-729
  • 37 Wakefield T W, Greenfield L J, Rolfe M W. Inflammatory and procoagulant mediator interactions in an experimental baboon model of venous thrombosis.  Thromb Haemost . 1993;  69 164-172
  • 38 Stewart G J, Stern H S, Lynch P R, Malmud L S, Schaub R G. Responses of canine jugular veins and carotid arteries to hysterectomy: increased permeability and leukocyte adhesions and invasion.  Thromb Res . 1980;  20 473-489
  • 39 Wessler S, Reimer S M, Sheps M C. Biologic assay of a thrombosis-inducing activity in human serum.  J Appl Physiol . 1959;  14 943-946
  • 40 Thomas D P, Merton R E, Hockley D J. The effect of stasis on the venous endothelium: an ultrastructural study.  Br J Haematol . 1983;  55 113-122
  • 41 Hamer J D, Malone P C, Silver I A. The PO2 in venous valve pockets: its possible bearing on thrombogenesis.  Br J Surg . 1981;  68 166-170
  • 42 Wakefield T W, Wrobleski S K, Sarpa M S. Deep venous thrombosis in the baboon: an experimental model.  J Vasc Surg . 1991;  14 588-598
  • 43 Sharrock N E, Go G, Harpel P C, Ranawat C S, Sculco T P, Salvati E A. The John Charnley Award. Thrombogenesis during total hip arthroplasty.  Clin Orthop . 1995;  319 16-27
  • 44 Karino T, Motomiya M. Flow through a venous valve and its implications for thrombus formation.  Thromb Res . 1984;  36 245-257
  • 45 Meissner M, Caps M, Bergelin R, Manzo R, Strandness D. Early outcome after isolated calf vein thrombosis.  J Vasc Surg . 1997;  26 749-756
  • 46 Hirsh J, Lensing A. natural history of minimal calf vein deep venous thrombosis. In: Bernstein E., ed. Vascular Diagnosis, 4th ed St. Louis: Mosby 1993: 779-781
  • 47 Solis M, Ranval T, Nix M. Is anticoagulation indicated for asymptomatic postoperative calf vein thrombosis.  J Vasc Surg . 1992;  16(3) 414-419
  • 48 Doouss T W. The clinical significance of venous thrombosis of the calf.  Br J Surg . 1976;  63 377-378
  • 49 Kakkar V V, Flanc C, Howe C T, Clarke M B. Natural history of post-operative deep-vein thrombosis.  Lancet . 1969;  2 230-232
  • 50 Markel A, Manzo R, Bergelin R, Strandness D. Pattern and distribution of thrombi in acute deep venous thrombosis.  Arch Surg . 1992;  127 305-309
  • 51 Messina L, Sarpa M, Smith M, Greenfield L. Clinical significance of routine imaging of iliac and calf veins by color flow duplex scanning in patients suspected of having acute lower extremity deep venous thrombosis.  Surgery . 1993;  114 921-927
  • 52 Mattos M, Melendres G, Sumner D. Prevalence and distribution of calf vein thrombosis in patients with symptomatic deep venous thrombosis: a color-flow duplex study.  J Vasc Surg . 1996;  24 738-744
  • 53 Kazmers A, Groehn H, Meeker C. Acute calf vein thrombosis: outcomes and implications.  Am Surg . 1999;  65 1124-1127
  • 54 Meissner M H, Zierler B K, Bergelin R O, Chandler W C, Manzo R A. Markers of plasma coagulation and fibrinolysis after acute deep venous thrombosis.  J Vasc Surg . 2000;  32 870-880
  • 55 Mewissen M W, Seabrook G R, Meissner M H. Catheter-directed thrombolysis of lower extremity deep venous thrombosis: report of a national multicenter registry.  Radiology . 1999;  211 39-49
  • 56 Hull R D, Raskob G E, Brant R F, Pineo G F, Valentine K A. Relation between the time to achieve the lower limit of the APTT therapeutic range and recurrent venous thromboembolism during heparin treatment for deep vein thrombosis.  Arch Intern Med . 1997;  157 2562-2568
  • 57 Beyth R J, Cohen A M, Landefeld C S. Long-term outcome of deep-vein thrombosis.  Arch Intern Med . 1995;  155 1031-1037
  • 58 Piovella F, Barone M. Long-term management of deep vein thrombosis.  Blood Coagul Fibrinolysis . 1999;  10(Suppl 2) S117-S122
  • 59 Philbrick J T, Becker D M. Calf deep venous thrombosis. A wolf in sheep's clothing?.  Arch Intern Med . 1988;  148 2131-2138
  • 60 Krupski W C, Bass A, Dilley R B, Bernstein E F, Otis S. Propagation of deep venous thrombosis by duplex ultrasonography.  J Vasc Surg . 1990;  12 467-475
  • 61 Caps M T, Meissner M H, Tullis M J. Venous thrombus stability during acute phase of therapy.  Vasc Med . 1999;  4 9-14
  • 62 Meissner M H, Caps M T, Bergelin R O, Manzo R A, Strandness D E. Propagation, rethrombosis, and new thrombus formation after acute deep venous thrombosis.  J Vasc Surg . 1995;  22 558-567
  • 63 Northeast A D, Burnand K G. The response of the vessel wall to thrombosis: the in vivo study of venous thrombolysis.  Ann N Y Acad Sci . 1992;  667 127-140
  • 64 Soo K S, Northeast A D, Happerfield L C, Burnand K G, Bobrow L G. Tissue plasminogen activator production by monocytes in venous thrombolysis.  J Pathol . 1996;  178 190-194
  • 65 Flanc C. An experimental study of the recanalization of arterial and venous thrombi.  Br J Surg . 1968;  55 519-523
  • 66 Scott G BD. A quantitative study of the fate of occlusive red venous thrombi.  Br J Exp Pathol . 1968;  49 544-549
  • 67 Wakefield T W, Linn M J, Henke P K. Neovascularization during venous thrombus organization: a preliminary study.  J Vasc Surg . 1999;  30 885-893
  • 68 Wakefield T W, Strieter R M, Wilke C A. Venous thrombosis-associated inflammation and attenuation with neutralizing antibodies to cytokines and adhesion molecules.  Arterioscler Thromb Vasc Biol . 1995;  15 258-268
  • 69 Northeast A D, Soo K S, Bobrow L G, Gaffney P J, Burnand K G. The tissue plasminogen activator and urokinase response in vivo during natural resolution of venous thrombus.  J Vasc Surg . 1995;  22 573-579
  • 70 Sevitt S. Organization of valve pocket thrombi and the anomalies of double thrombi and valve cusp involvement.  Br J Surg . 1974;  61 641-649
  • 71 Sevitt S. The mechanisms of canalisation in deep vein thrombosis.  J Pathol . 1973;  110 153-165
  • 72 Killewich L A, Macko R F, Cox K. Regression of proximal deep venous thrombosis is associated with fibrinolytic enhancement.  J Vasc Surg . 1997;  26 861-868
  • 73 Arcelus J I, Caprini J A, Hoffman K N. Laboratory assays and duplex scanning outcomes after symptomatic deep vein thrombosis: preliminary results.  J Vasc Surg . 1996;  23 616-621
  • 74 Rosfors S, Eriksson M, Leijd B, Nordstrom E. A prospective follow-up study of acute deep venous thrombosis using colour duplex ultrasound, phlebography and venous occlusion plethysmography.  Int Angiol . 1997;  16 39-44
  • 75 Killewich L A, Bedford G R, Beach K W, Strandness Jr E D. Spontaneous lysis of deep venous thrombi: rate and outcome.  J Vasc Surg . 1989;  9 89-97
  • 76 van Ramshorst B, van Bemmelen S P, Honeveld H, Faber J AJ, Eikelbloom B C. Thrombus regression in deep venous thrombosis. Quantification of spontaneous thrombolysis with duplex scanning.  Circulation . 1992;  86 414-419
  • 77 Prandoni P, Cogo A, Bernardi E. A simple ultrasound approach for detection of recurrent proximal vein thrombosis.  Circulation . 1993;  88(4, Part 1) 1730-1735
  • 78 Meissner M H, Caps M T, Zierler B K. Determinants of chronic venous disease after acute deep venous thrombosis.  J Vasc Surg . 1998;  28 826-833
  • 79 Meissner M H, Manzo R A, Bergelin R O, Markel A, Strandness D E. Deep venous insufficiency: the relationship between lysis and subsequent reflux.  J Vasc Surg . 1993;  18 596-608
  • 80 Dalen J E, Alpert J S. Natural history of pulmonary embolism.  Prog Cardiovasc Dis . 1975;  17 259-270
  • 81 Plate G, Ohlin P, Eklof B. Pulmonary embolism in acute ileofemoral venous thrombosis.  Br J Surg . 1985;  72 912-915
  • 82 Monreal M, Barroso R-J, Ruiz Manzano J. Asymptomatic pulmonary embolism in patients with deep vein thrombosis. Is it useful to take a lung scan to rule out this condition?.  J Cardiovasc Surg . 1989;  30 104-107
  • 83 Huisman M V, Buller H R, ten Cate W J. Unexpected high prevalence of silent pulmonary embolism in patients with deep venous thrombosis.  Chest . 1989;  95 498-502
  • 84 Meignan M, Rosso J, Gauthier H. Systematic lung scans reveal a high frequency of silent pulmonary embolism in patients with proximal deep venous thrombosis.  Arch Intern Med . 2000;  160 159-164
  • 85 Girolami A, Prandoni P, Simioni P. The pathogenesis of venous thromboembolism.  Haematologica . 1995;  80(Suppl 2) 25-35
  • 86 Hull R D, Raskob G E, Hirsh J. Prophylaxis of venous thromboembolism. An overview.  Chest . 1986;  89(Suppl 5) 374S-383S
  • 87 Moser K, LeMoine J. Is embolic risk conditioned by the location of deep venous thrombosis?.  Ann Intern Med . 1981;  94(4, Part 1) 439-444
  • 88 Browse N L, Thomas M L. Source of non-lethal pulmonary emboli.  Lancet . 1974;  1 258-259
  • 89 Stamatakis J D, Kakkar V V, Lawrence D, Bentley P G. The origin of thrombi in the deep veins of the lower limb: a venographic study.  Br J Surg . 1978;  65 449-451
  • 90 Girard P, Musset D, Parent F, Maitre S, Phlippoteau C, Simmoneau S. High prevalence of detectable venous thrombosis in patients with acute pulmonary embolism.  Chest . 1999;  116 903-908
  • 91 Passman M, Moneta G, Taylor L. Pulmonary embolism is associated with the combination of isolated calf vein thrombosis and respiratory symptoms.  J Vasc Surgery . 1997;  25 39-45
  • 92 Menzoian J, Sequeira J, Doyle J. Therapeutic and clinical course of deep venous thrombosis.  Am J Surg . 1983;  146 581-585
  • 93 Moreno-Cabral R, Kistner R L, Nordyke R A. Importance of calf vein thrombophlebitis.  Surgery . 1976;  80 735-742
  • 94 Douketis J D, Kearon C, Bates S, Duku E K, Ginsberg J S. Risk of fatal pulmonary embolism in patients with treated venous thromboembolism.  Jama . 1998;  279 458-462
  • 95 Kniffen W D, Baron J A, Barrett J, Birkmeyer J D, Anderson F A. The epidemiology of diagnosed pulmonary embolism and deep venous thrombosis in the elderly.  Arch Intern Med . 1994;  154 861-866
  • 96 Monreal M, Ruiz J, Salvador R, Morera J, Arias A. Recurrent pulmonary embolism. A prospective study.  Chest . 1989;  95 976-979
  • 97 Pacouret G, Alison D, Pottier J-M, Bertrand P, Charbonnier B. Free-floating thrombus and embolic risk in patients with angiographically confirmed proximal deep venous thrombosis.  Arch Intern Med . 1997;  157 305-308
  • 98 Goldhaber S Z, Visani L, De Rosa M. Acute pulmonary embolism: clinical outcomes in the International Cooperative Pulmonary Embolism Registry (ICOPER).  Lancet . 1999;  353 1386-1389
  • 99 Janke R M, McGovern P G, Folsom A R. Mortality, hospital discharges, and case fatality for pulmonary embolism in the Twin Cities: 1980-1995.  J Clin Epidemiol . 2000;  53 103-109
  • 100 Prandoni P, Lensing A, Cogo A. The long term clinical course of acute deep venous thrombosis.  Ann Intern Med . 1996;  125 1-7
  • 101 Monreal M, Martorell A, Callejas J. Venographic assessment of deep vein thrombosis and risk of developing post-thrombotic syndrome: a prospective trial.  J Intern Med . 1993;  233 233-238
  • 102 Strandness D E, Langlois Y, Cramer M, Randlett A, Thiele B L. Long-term sequelae of acute venous thrombosis.  JAMA . 1983;  250 1289-1292
  • 103 Prandoni P, Villalta S, Polistena P. Symptomatic deep-vein thrombosis and the post-thrombotic syndrome.  Haematologica . 1995;  80(Suppl 2) 42-48
  • 104 Lindner D J, Edwards J M, Phinney E S, Taylor L M, Porter J M. Long-term hemodynamic and clinical sequelae of lower extremity deep vein thrombosis.  J Vasc Surg . 1986;  4 436-442
  • 105 Biguzzi E, Mozzi E, Alatri A, Taioli E, Moia M, Mannucci P M. The post-thrombotic syndrome in young women: retrospective evaluation of prognostic factors.  Thromb Haemost . 1998;  80 575-577
  • 106 Holmstrom M, Aberg W, Lockner D, Paul C. Long-term clinical follow-up in 265 patients with deep venous thrombosis initially treated with either unfractionated heparin or dalteparin: a retrospective analysis.  Thromb Haemost . 1999;  82 1222-1226
  • 107 Kurz X, Kahn S R, Abenhaim L. Chronic venous disorders of the leg: epidemiology, outcomes, diagnosis and management. Summary of an evidence-based report of the VEINES task force. Venous Insufficiency Epidemiologic and Economic Studies.  Int Angiol . 1999;  18 83-102
  • 108 Biland L, Widmer L K. Varicose veins (VV) and chronic venous insufficiency (CVI). Medical and socioeconomic aspects, Basle study.  Acta Chir Scand Suppl . 1988;  544 9-11
  • 109 Bergvist D, Jendteg S, Johansen L, Persson U, Odegaard K. Cost of long-term complications of deep venous thrombosis of the lower extremities: An analysis of a defined patient population in Sweden.  Ann Intern Med . 1997;  126 454-457
  • 110 Nicolaides A N, Hussein M K, Szendro G. The relationship of venous ulceration with ambulatory venous pressure measurements.  J Vasc Surg . 1993;  17 414-419
  • 111 Johnson B F, Manzo R A, Bergelin R O, Strandness D E. Relationship between changes in the deep venous system and the development of the postthrombotic syndrome after an acute episode of lower limb deep vein thrombosis: A one- to six-year follow-up.  J Vasc Surg . 1995;  21 307-313
  • 112 Killewich L A, Martin R, Cramer M, Beach K W, Strandness D E. An objective assessment of the physiological changes in the postthrombotic syndrome.  Arch Surg . 1985;  120 424-426
  • 113 Markel A, Manzo R A, Bergelin R O, Strandness D E. Valvular reflux after deep vein thrombosis: incidence and time of occurrence.  J Vasc Surg . 1992;  15 377-384
  • 114 Glas-Greenwalt P, Dalton B C, Astrup T. Localization of tissue plasminogen activator in relation to morphological changes in human saphenous veins used as coronary artery bypass autografts.  Ann Surg . 1975;  181 431-441
  • 115 Browse N L, Clemenson G, Thomas M L. Is the postphlebitic leg always postphlebitic?.  <~>Relation between phlebographic appearances of deep-vein thrombosis and late sequelae. BMJ . 1980;  281 1167-1170
  • 116 Janssen M C, Haenen J H, van Asten N W. Clinical and haemodynamic sequelae of deep venous thrombosis: retrospective evaluation after 7-13 years.  Clin Sci (Colch) . 1997;  93 7-12
  • 117 Gooley N A, Sumner D S. Relationship of venous reflux to the site of venous valvular incompetence: implications for venous reconstructive surgery.  J Vasc Surg . 1988;  7 50-59
  • 118 Rosfors S, Lamke L O, Nordstroem E, Bygdeman S. Severity and location of venous valvular insufficiency: the importance of distal valve function.  Acta Chir Scand . 1990;  156 689-694
  • 119 van Bemmelen S P, Bedford G, Beach K, Strandness Jr E D. Status of the valves in the superficial and deep venous system in chronic venous disease.  Surgery . 1991;  109 730-734
  • 120 Meissner M H, Caps M T, Zierler B K, Bergelin R O, Manzo R A, Strandness D E. Deep venous thrombosis and superficial venous reflux.  J Vasc Surg . 2000;  32 48-56
  • 121 Goldhaber S Z, Buring J E, Lipnick R J, Hennekens C H. Pooled analyses of randomized trials of streptokinase and heparin in phlebographically documented acute deep venous thrombosis.  Am J Med . 1984;  76 393-397
  • 122 Piccioli A, Prandoni P, Goldhaber S Z. Epidemiologic characteristics, management, and outcome of deep venous thrombosis in a tertiary-care hospital: the Brigham and Women's Hospital DVT Registry.  Am Heart J . 1996;  132 1010-1014
  • 123 Brandjes D, Buller H, Heijboer H. Randomised trial of effect of compression stockings in patients with symptomatic proximal-vein thrombosis.  Lancet . 1997;  349 759-762
  • 124 Gonzalez-Fajardo J A, Arreba E, Castrodeza J. Venographic comparison of subcutaneous low-molecular weight heparin with oral anticoagulant therapy in the long-term treatment of deep venous thrombosis.  J Vasc Surg . 1999;  30 283-292
  • 125 The DVTENOX Study Group. Markers of hemostatic system activation in acute deep venous thrombosis- evolution during the first days of heparin treatment.  Thromb Haemost . 1993;  70 909-914
  • 126 Dolovich L R, Ginsberg J S, Douketis J D, Holbrook A M, Cheah G. A meta-analysis comparing low-molecular weight heparins with unfractionated heparin in the treatment of venous thromboembolism.  Arch Intern Med . 2000;  160 181-188
  • 127 Prandoni P, Lensing A W, Buller H R. Comparison of subcutaneous low-molecular-weight heparin with intravenous standard heparin in proximal deep-vein thrombosis.  Lancet . 1992;  339 441-445
  • 128 Caprini J A, Arcelus J I, Reyna J J. Deep vein thrombosis outcome and the level of oral anticoagulation therpay.  J Vasc Surg . 1999;  30 805-812
  • 129 Kearon C, Gent M, Hirsh J. A comparison of three months of anticoagulation with extended anticoagulation for a first episode of idiopathic venous thromboembolism.  N Engl J Med . 1999;  340 901-907
  • 130 Schulman S, Granqvist S, Holmstrom M. The duration of oral anticoagulant therapy after a second episode of venous thromboembolism. The Duration of Anticoagulation Trial Study Group.  N Engl J Med . 1997;  336 393-398
  • 131 Lensing A WA, Prandoni P, Prins M H, Buller H R. Deep-vein thrombosis.  Lancet . 1999;  353 479-485
  • 132 Hirsh J. The optimal duration of anticoagulant therapy for venous thrombosis.  N Engl J Med . 1995;  332 1710-1711
  • 133 Comerota A, Aldridge S. Thrombolytic therapy for acute deep venous thrombosis.  Semin Vasc Surg . 1992;  5 76-81
  • 134 Decousus H, Leizorovicz A, Parent F. A clinical trial of vena caval filters in the prevention of pulmonary embolism in patients with proximal deep-vein thrombosis.  N Engl J Med . 1998;  338 409-415