Exercise and Prevention of Syncope: EXPOSE

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. Identifier: NCT00203593
Recruitment Status : Suspended (No Resources - No Personnel)
First Posted : September 20, 2005
Last Update Posted : March 14, 2007
Information provided by:
University of Calgary

Brief Summary:
The purpose of this study is to determine whether eight weeks of exercise performed at an intensity of approximately 65% VO2max will improve symptoms associated with fainting (vasovagal syncope).

Condition or disease Intervention/treatment Phase
Syncope Behavioral: Exercise Device: Blood volume Procedure: VO2max test Procedure: Lower body negative pressure Behavioral: Heart Rate Procedure: Blood Pressure Behavioral: Total Peripheral Resistance Phase 1

Detailed Description:

Background: Vasovagal syncope affects 20-30% of the population, and for those who faint recurrently it causes a significant reduction in the quality of life. Although significant progress has been made in the past 15 years in our understanding of its diagnosis and prognosis, our therapeutic attempts often end in failure. Many patients who have been diagnosed with vasovagal syncope have a reduced orthostatic tolerance. Improved orthostatic tolerance has been achieved through exercise in a number of studies on healthy individuals. However, its efficacy as a means of treatment for those with vasovagal syncope has not been thoroughly explored.

Comparison: Subjects will be randomized to one of two groups: an exercise group or control. The exercise group will be asked to train at a target of approximately 65% of their maximum exercise capacity (VO2max) for 8 weeks/3 times per week. The control group will be asked to perform a series of neck rotation exercises. Orthostatic tolerance will be examined in both groups pre and post intervention.

Study Type : Interventional  (Clinical Trial)
Enrollment : 20 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single
Primary Purpose: Treatment
Official Title: EXercise for the Prevention of Syncope Evaluation
Study Start Date : March 2006
Study Completion Date : June 2007

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. Orthostatic tolerance - this will be measured at baseline and post intervention

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria: a diagnosis of vasovagal syncope as the cause of loss of consciousness, >1 lifetime syncope spell preceding enrolment, >-3 points on the S3 score for structurally normal hearts, >18 yrs of age with informed consent -

Exclusion Criteria: subjects with a negative Physical Activity Readiness Questionnaire (PARQ), those who are unable to provide informed consent, those with a VO2max >55ml/kg/min, those who exercise more than 30 minutes per day, 3 times per week, other causes of syncope, individuals with valvular, coronary, myocardial, or conductive abnormality, significant arrhythmia, hypertrophic cardiomyopathy, permanent pacemaker, seizure disorder, heart failure, major chronic cardiovascular disease, or renal dysfunction.

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 identifier (NCT number): NCT00203593

Canada, Alberta
University of Calgary (Health Sciences Center)
Calgary, Alberta, Canada, T2N 4N1
Sponsors and Collaborators
University of Calgary
Principal Investigator: Robert S Sheldon, MD PhD University of Calgary Identifier: NCT00203593     History of Changes
Other Study ID Numbers: 18413
First Posted: September 20, 2005    Key Record Dates
Last Update Posted: March 14, 2007
Last Verified: March 2007

Keywords provided by University of Calgary:
total peripheral resistance
blood volume expansion
orthostatic tolerance

Additional relevant MeSH terms:
Consciousness Disorders
Neurobehavioral Manifestations
Neurologic Manifestations
Nervous System Diseases
Signs and Symptoms