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Assessment of Left Ventricular Torsion by Echocardiography Study (LVTorsion)

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified June 2008 by The Cleveland Clinic.
Recruitment status was:  Active, not recruiting
Information provided by:
The Cleveland Clinic Identifier:
First received: December 26, 2007
Last updated: October 22, 2008
Last verified: June 2008
The purpose of this study is to learn about the twisting or wringing motion of the heartbeat called torsion which can be seen on ultrasound. This study will help figure out if there is a difference in the how a heart twists at rest and with exercise in people with normal hearts compared to people with HCM (abnormally thickened heart muscle). Volunteers will have an echocardiogram (ultrasound of the heart) while lying on a bed both at rest and while peddling a wheel located at at the foot of the bed. The patients will take about 1 to 1 1/2 hours total and the study will be complete after this procedure.

Hypertrophic Cardiomyopathy

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Cross-Sectional
Official Title: Assessment of LV Torsion by Tissue Doppler Echocardiography

Resource links provided by NLM:

Further study details as provided by The Cleveland Clinic:

Primary Outcome Measures:
  • Myocardial torsion as measured by tissue Doppler echocardiography [ Time Frame: 1 1/2 hours ]

Estimated Enrollment: 40
Study Start Date: June 2005
Estimated Study Completion Date: December 2008
Estimated Primary Completion Date: December 2008 (Final data collection date for primary outcome measure)
Patients with structurally normal hearts
Patients with hypertrophic cardiomyopathy

Detailed Description:

Left ventricular myocardial torsion (myocardial wringing motion) will be investigated by the use of tissue Doppler echocardiography in both normal and HCM (hypertrophic cardiomyopathy) patients. The objective of this study is to characterize the myocardial torsional behavior in normal and in HCM patients both at rest and while undergoing moderate physiological exercise.

After a routine echocardiographic study, tissue Doppler echocardiogram will be performed before and during supine bicycle exercise. Stress EchoTM Bed with ergometer (supine bicycle) is used during exercise testing. Standard electrocardiogram and blood pressure will be monitored throughout the exercise testing. This procedure will take about 1 to 1 1/2 hours and will not involve any follow-up.


Ages Eligible for Study:   18 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Patients undergoing cardiac echocardiography testing in the outpatient department

Inclusion Criteria:

  • Male and female patients age 18 to 70 years
  • Patients with hypertrophic cardiomyopathy
  • Patients with the ability to exercise using a supine bicycle
  • Ability to provide informed consent

Exclusion Criteria:

  • Aortic valve stenosis classified as moderate to severe
  • Severe left ventricular obstruction at rest (high gradients > 4m/second)
  • Uncontrolled arrhythmias including atrial fibrillation, atrial flutter, frequent premature ventricular ectopic beats
  • History of sustained ventricular tachyarrhythmia at any time
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00589836

United States, Ohio
The Cleveland Clinic Foundation
Cleveland, Ohio, United States, 44195
Sponsors and Collaborators
The Cleveland Clinic
Principal Investigator: Zoran Popovic, M.D. The Cleveland Clinic
  More Information

Responsible Party: Zoran Popovic, PhD, Cleveland Clinic Identifier: NCT00589836     History of Changes
Other Study ID Numbers: IRB 05-023
Study First Received: December 26, 2007
Last Updated: October 22, 2008

Keywords provided by The Cleveland Clinic:
hypertrophic cardiomyopathy
tissue doppler echocardiography
myocardial torsion

Additional relevant MeSH terms:
Cardiomyopathy, Hypertrophic
Torsion Abnormality
Heart Diseases
Cardiovascular Diseases
Pathological Conditions, Anatomical
Aortic Stenosis, Subvalvular
Aortic Valve Stenosis
Heart Valve Diseases processed this record on September 21, 2017