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Feasibility Study of Exercise in Patients With Leg Blood Clots (EXPERT)

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: May 29, 2009
Last Update Posted: April 13, 2017
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Suman Rathbun, University of Oklahoma
The purpose of this pilot study is to assess the feasibility of determining the effects of a structured exercise program started two to four weeks after diagnosis of a first episode lower-extremity deep vein thrombosis (DVT) for a period of 12 weeks in reducing the incidence of post-thrombotic syndrome (PTS).

Condition Intervention
Deep Vein Thrombosis Other: Exercise

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: EXPERT Trial: Exercise to Prevent Post-thrombotic Syndrome Elicited by Recent Thrombosis

Resource links provided by NLM:

Further study details as provided by Suman Rathbun, University of Oklahoma:

Primary Outcome Measures:
  • Villalta PTS score [ Time Frame: at 26 weeks ]

Secondary Outcome Measures:
  • PTS, venous valvular reflux, VEINES, MOS SF-36, maximal treadmill test, 6-minute walk, and blood analysis [ Time Frame: at 12 weeks ]

Enrollment: 5
Study Start Date: October 2008
Study Completion Date: December 2016
Primary Completion Date: December 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Exercise testing
Feasibility study; all participants receive intervention
Other: Exercise

Detailed Description:

Deep Vein Thrombosis (DVT) affects nearly 300,000 people in the U.S. each year. DVT of the leg results in PTS in up to 65% of patients,despite receiving appropriate medical management with anticoagulant therapy.

PTS, caused by persistent venous outflow obstruction and venous valvular dysfunction, may result in symptoms of leg pain, swelling, heaviness and cramping especially with prolonged standing.

All eligible patients with documented first-episode DVT interested in participating will undergo medical screening and a screening treadmill test prior to enrollment between two and four weeks post DVT diagnosis. All patients will be provided and asked to wear class II (30 to 40mmHg) knee length compression hose daily during the entire trial.

The formal exercise training includes both a supervised walking program and a home-based walking program for 12 weeks with follow-up at 26 weeks. Blood tests will be taken to measure levels of indicators of inflammation at baseline, week 4, week 12, and week 26. The primary outcomes will be the feasibility of the exercise program and the incidence of post-thrombotic syndrome at 26 weeks.


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Ages Eligible for Study:   21 Years to 75 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • First episode lower extremity DVT (proximal or distal) documented by ultrasound, CT angiogram or venogram within last 4 weeks.
  • Treatment with LMWH, or unfractionated heparin (UFH) followed by warfarin adjusted to keep INR 2 to 3 for at least 3 months, or LMWH given in therapeutic doses as sole therapy.
  • Age 21 to 75 years old.

Exclusion Criteria:

  • Recurrent DVT.
  • Treatment of DVT with systemic or catheter-directed thrombolysis Contraindications to exercise training according to the American College of Sports Medicine (e.g., acute myocardial infarction, unstable angina, etc.,).
  • Life expectancy < 1 year.
  • Pregnancy.
  • Geographic inaccessibility.
  • Screening (pre-randomization) exercise stress test demonstrating contraindication to exercise training (see exclusion #2).
  • Cognitive dysfunction assessed by mini-mental status exam (score < 24).
  • Inability to walk.
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00910364

United States, Oklahoma
University of Oklahoma Health Sciences Center
Oklahoma city, Oklahoma, United States, 73104
Sponsors and Collaborators
University of Oklahoma
Principal Investigator: Suman W. Rathbun, M.D. Oklahoma University Health Sciences Center
  More Information

Responsible Party: Suman Rathbun, Professor of Medicine, University of Oklahoma
ClinicalTrials.gov Identifier: NCT00910364     History of Changes
Other Study ID Numbers: 14181
ORA #20081607 ( Other Identifier: Office of Research Administration )
First Submitted: May 28, 2009
First Posted: May 29, 2009
Last Update Posted: April 13, 2017
Last Verified: April 2017

Keywords provided by Suman Rathbun, University of Oklahoma:
Lower extremity DVT
leg clot
Deep vein thrombosis

Additional relevant MeSH terms:
Venous Thrombosis
Postthrombotic Syndrome
Embolism and Thrombosis
Vascular Diseases
Cardiovascular Diseases
Venous Insufficiency