Myocardial Contrast Echocardiography (MCE) to Check for Living & Working

Status Completed

Clinical Trial Summary

Coronary artery disease (CAD) can cause poor blood flow and supply to the heart muscle. It can result in irreversible damage to the heart muscle and poor function. Before treating patients with heart disease it is important to know how well the heart is functioning. Echocardiography is a diagnostic test that can measure heart function. If part of the heart muscle is not working properly due to previous damage, echocardiography can provide information about how much improvement can be expected after treatment (surgery or angioplasty).

The purpose of this study is to compare the accuracy of myocardial contrast echocardiography (MCE) to dobutamine echocardiography to detect the potential for damaged heart muscle to be treated and function in patients with heart disease.

Myocardial contrast echocardiography (MCE) does not use radioactivity. It uses sound waves like standard echocardiography. However, with MCE patients receive an injection of a "contrast agent" directly into the blood stream through a vein. The contrast agent, called Optison, is made of tiny microbubbles smaller than red blood cells. The echocardiogram can detect these microbubbles in the small blood vessels of the heart muscle and allow researchers to find areas of the heart receiving less blood flow than others.

Echocardiography with Dobutamine does not use radioactivity. It uses sound waves, like standard echocardiography. During this echocardiogram patients receive doses of a medication called dobutamine that stimulates the heart to beat stronger and faster. Heart muscle that does not beat stronger after dobutamine is probably dead, usually as a result of a previous heart attack.

Clinical Trial Description

Dobutamine echocardiography has become a valuable technique for the evaluation of myocardial viability in patients with coronary artery disease (CAD) and dysfunctional myocardium because it can accurately predict which myocardial segments will show contractile recovery after successful revascularization. Myocardial contrast echocardiography (MCE) offers the potential to evaluate tissue perfusion at the level where oxygen transfer to the myocytes occurs. MCE, therefore, can provide information regarding the functional status of the myocardial microvasculature which has a close relationship with myocellular integrity. The purpose of this study is to evaluate the accuracy of MCE compared to dobutamine echocardiography to detect myocardial viability in patients with CAD and resting wall motion abnormalities. ;

Study Design

Endpoint Classification: Efficacy Study, Primary Purpose: Treatment

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT00001891
Study type	Interventional
Source	National Institutes of Health Clinical Center (CC)
Contact
Status	Completed
Phase	Phase 3
Start date	May 1999
Completion date	March 2001

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Myocardial Contrast Echocardiography (MCE) to Check for Living and Working Heart Muscle

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms