Exercise Training After an Acute Blood Clot

NCT ID: NCT01864447

Last Updated: 2014-12-04

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

20 participants

Study Classification

INTERVENTIONAL

Study Start Date

2013-05-31

Study Completion Date

2014-05-31

Brief Summary

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Patients after an acute blood clot in the veins are at risk for leg-related complications such as pain, swelling, and immobility. In addition, the occurrence of blood clots can have major implications for personal health including weight gain, blood clot recurrence and impairment in cardiovascular functioning. The goal of this study is to determine whether aerobic exercise training is a therapeutic strategy to offset risk factors for recurrent blood clots or leg complications.

Detailed Description

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Cardiac rehabilitation (CR), a formalized exercise and behavioral modification program, is the cornerstone of secondary prevention for heart disease. Implementation of CR early after an acute myocardial infarction (MI) is associated with improved cardiac function and survival. As such, CR is now standard of care for a majority of hospital-based discharge programs following coronary events. In stark contrast, no similar program exists following an acute venous thromboembolism (VTE or blood clot), despite a high rate of limb and respiratory disability after VTE, shared risk factors with heart disease, and known beneficial impact of exercise training on VTE complications (e.g. post-thrombotic syndrome, PTS).

Body weight is a key modifiable risk factor driving risk of incident and recurrent VTE. Obese patients with prior VTE have a 2-fold higher risk of a second VTE compared to normal weight patients.(1) Importantly, VTE recurrence risk escalates if weight control is not established. Weight gain after acute DVT is common, with a mean 7% increase over 6 months.(2) To date, however, there is limited evidence regarding whether early initiation of exercise training following acute DVT is safe and feasible and mitigates weight gain associated with a VTE diagnosis. Previously, a significant decrease in body weight and fat mass loss was demonstrated utilizing high-caloric expenditure exercise in the CR setting.(3) Delineating the impact of high-caloric expenditure exercise to induce weight loss and reduce VTE complications and recurrence is a critical first step toward evaluating the role of early post-VTE rehabilitation in the clinical setting.

Conditions

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VTE

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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VTE REHABILITATION

The exercise prescription emphasizes gradual progression to longer duration (45-60 minutes per session), lower intensity (60-70% peak heart rate (PHR) exercise. Subjects have an exercise expenditure goal of \>3000 kcal/wk, attained after 2 to 4 weeks of gradually lengthening exercise bouts. All exercise sessions will be performed onsite for the first two weeks, after which subjects will perform 2 additional sessions a week in the home environment. Exercise logs will be reviewed weekly.

The Dietary Behavioral Weight Loss Intervention(BWL) intervention consists primarily of 12 small group sessions led by a dietician emphasizing dietary records, itemization of food, and caloric content. Subjects will be given individualized daily caloric goals 500 kcal less than predicted maintenance calories based on their baseline body weight.

Group Type EXPERIMENTAL

VTE REHABILITATION: High-Caloric Expenditure Exercise Training (HCE) and The Dietary Behavioral Weight Loss Intervention (BWL)

Intervention Type BEHAVIORAL

CONTROL

The 12-week program will consist of monthly phone contacts to check-in to capture physical activity done outside of the intervention setting.

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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VTE REHABILITATION: High-Caloric Expenditure Exercise Training (HCE) and The Dietary Behavioral Weight Loss Intervention (BWL)

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* Diagnosis of acute unprovoked proximal or distal DVT \>= 6 weeks
* On anticoagulation therapy
* Patient self-report of ability to walk 10 minutes without interruption or pain
* Age \>=16 and \<80
* Willingness to participate in exercise rehabilitation program at Tilley Drive South Burlington

Exclusion Criteria

* Symptomatic PE, defined as 1) right heart strain as assessed by computed tomography or echocardiogram, 2) resting hypoxia - resting oxygen saturation \<92%
* Provoked VTE: major surgery, trauma, or pregnancy
* Medical condition that alters ability to walk for exercise
Minimum Eligible Age

16 Years

Maximum Eligible Age

79 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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University of Vermont

OTHER

Sponsor Role lead

Responsible Party

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Susan Lakoski

Assistant Professor, University of Vermont College of Medicine

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Susan G Lakoski, MD

Role: PRINCIPAL_INVESTIGATOR

University of Vermont

Locations

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Flether Allen Healthcare

Burlington, Vermont, United States

Site Status

Countries

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United States

References

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Other Identifiers

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CHRMS M13-219

Identifier Type: -

Identifier Source: org_study_id