Real Time 3-Dimensional Stress Echocardiography

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.

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Key information

Conditions

Coronary Disease Arterial Occlusive Diseases Arteriosclerosis Cardiovascular Diseases Coronary Artery Disease Heart Diseases Ischemia Myocardial Ischemia Pathologic Processes Pathological Conditions, Signs and Symptoms Vascular Diseases

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

National Heart, Lung and Blood Institute (NHLBI)

Bethesda, Maryland, 20892, United States

About this study

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.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

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.

Treatment and study plan

Real time 3-dimensional stress echocardiography

Procedure

Sponsors and collaborators

Lead sponsor

National Heart, Lung, and Blood Institute (NHLBI)

Nih

Registry information

Important dates

Study start: 1999
Study completion: 2001
First posted: Dec 10, 2002
Registry last updated: Mar 4, 2008

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed