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Real Time 3-Dimensional Stress Echocardiography

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT00001886
First Posted: December 10, 2002
Last Update Posted: March 4, 2008
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:
National Institutes of Health Clinical Center (CC)
  Purpose

An echocardiogram is an ultrasound technique used to gather information about the heart. Standard echocardiograms create images of the heart in two dimensions, thereby named 2D (two-dimensional) echocardiography. A new technique has been developed allowing images to be taken of the heart in three dimensions (real time 3D echocardiography).

The 3D echocardiogram uses high frequency sound waves to see and record the movement and function of the heart muscle. The echocardiogram is taken by placing an instrument called a transducer against the chest wall over the heart.

In this study patients will undergo a dobutamine stress echocardiogram. Dobutamine is drug that causes the heart to beat stronger and faster, similar to how it acts when exercising. Dobutamine allows researchers to tell if the heart is suffering from a lack of oxygen during exercise or other forms of stress, or if it is permanently damaged.

The purpose of this study is to determine whether stress 3D echocardiography is feasible and accurate in the detection of heart disease (coronary artery disease). Results of the 3D echocardiogram will be compared to results from standard 2D echocardiograms.


Condition Intervention Phase
Coronary Disease Procedure: Real time 3-dimensional stress echocardiography Phase 2

Study Type: Interventional
Study Design: Primary Purpose: Treatment
Official Title: Real Time 3-Dimensional Stress Echocardiography

Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment: 150
Study Start Date: March 1999
Estimated Study Completion Date: March 2001
Detailed Description:
Stress echocardiography has become a valuable technique for the non-invasive detection of coronary artery disease. Its accuracy has been shown to be superior to that of the exercise electrocardiogram and comparable to that of myocardial perfusion imaging. The adequacy of stress echocardiography with conventional two-dimensional imaging, however, is highly dependent on operator expertise. Further, interpretation of test results is subjective and qualitative, and is based on analysis of wall motion after arbitrary segmentation of the left ventricle. Real time 3-dimensional (RT3D) echocardiography is a new technique that permits the unrestricted assessment of left ventricular wall motion and function in a single cardiac beat without ECG or respiratory gating. We hypothesize that RT3D echocardiography will have similar or greater accuracy for the detection of wall motion abnormalities compared to the conventional two-dimensional examination. We therefore propose to acquire RT3D echocardiographic images in patients with known or suspected coronary artery disease who undergo stress echocardiography. We will correlate these results with findings from coronary angiography and compare the ability of RT3D echocardiography to detect coronary artery disease with that of the conventional two-dimensional exam.
  Eligibility

Information from the National Library of Medicine

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, Learn About Clinical Studies.


Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Patients older than 18 years of age with known or suspected coronary artery disease who agree to undergo stress echocardiography and have undergone or will undergo coronary angiography within 3 months of the stress echocardiogram.

No pre-menopausal patients who are lactating, are pregnant or potentially pregnant as judged by history, physical examination, ultrasound or urine pregnancy test.

No unstable angina.

No recent myocardial infarction (less than 1 month).

No ventricular ectopy during baseline conditions (i.e., couplets, frequent PVC's [greater than 6/min], early coupling ["R-on-T" phenomenon], ventricular bigeminy) that might potentially predispose the patient for the development of dangerous dysrhythmias during dobutamine infusion.

No congestive heart failure.

No significant hypertension (systolic blood pressure greater than 170 mmHg) or hypotension (systolic blood pressure less than 100 mmHg).

No sinus tachycardia greater than 100 beats/min.

No other acute medical illness.

No atrial fibrillation, or inadequate two-dimensional echocardiographic windows.

  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): NCT00001886


Locations
United States, Maryland
National Heart, Lung and Blood Institute (NHLBI)
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Heart, Lung, and Blood Institute (NHLBI)
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00001886     History of Changes
Other Study ID Numbers: 990074
99-H-0074
First Submitted: November 3, 1999
First Posted: December 10, 2002
Last Update Posted: March 4, 2008
Last Verified: February 2000

Keywords provided by National Institutes of Health Clinical Center (CC):
Coronary Artery Disease
Ischemia
Ultrasound
Ventricular Function
Wall Motion

Additional relevant MeSH terms:
Coronary Disease
Coronary Artery Disease
Myocardial Ischemia
Heart Diseases
Cardiovascular Diseases
Vascular Diseases
Arteriosclerosis
Arterial Occlusive Diseases