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Moderate Mitral Regurgitation in CABG Patients

2014-08-27 03:33:02 | BioPortfolio

Summary

Background:

The presence of a mild to moderate ischemic mitral regurgitation (IMR) results in a significantly reduced long-term survival and increased hospitalizations for heart-failure. The benefit of adding mitral valve surgery to coronary artery by-pass surgery (CABG) is well documented in the combination of coronary artery disease and severe MR. On the other hand, it is clinical practice to refrain from repairing the mitral valve in those CABG cases where the IMR is mild to moderate. However, there are no conclusive data available to support this principle. The existing studies are small, retrospective, and the results contradictive. The need for a prospective randomized trial has frequently been proposed and discussed, however, to the best of our knowledge, such a study has not yet commenced.

Study design:

The Moderate Mitral Regurgitation In Patients Undergoing CABG (MoMIC) Trial is the first international multi-center, large-scale study to clarify whether moderate IMR in CABG patients should be corrected. A total of 550 CABG patients with moderate IMR are to be randomized to either CABG alone or CABG plus mitral valve correction.

Implication:

If correction of moderate MR in CABG patients is the superior strategy, this should be offered to all patients in this entity.

Study Design

Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Single Blind (Outcomes Assessor), Primary Purpose: Treatment

Conditions

Moderate Mitral Regurgitation

Intervention

CABG alone, CABG + Mitral repair

Location

Dep. of Cardiothoracic Surgery, Aarhus University Hospital, Skejby,
Aarhus
Denmark
8000

Status

Recruiting

Source

University of Aarhus

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:33:02-0400

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Medical and Biotech [MESH] Definitions

Backflow of blood from the LEFT VENTRICLE into the LEFT ATRIUM due to imperfect closure of the MITRAL VALVE. This can lead to mitral valve regurgitation.

Abnormal protrusion or billowing of one or both of the leaflets of MITRAL VALVE into the LEFT ATRIUM during SYSTOLE. This allows the backflow of blood into left atrium leading to MITRAL VALVE INSUFFICIENCY; SYSTOLIC MURMURS; or CARDIAC ARRHYTHMIA.

A type of heart valve surgery that involves the repair, replacement, or reconstruction of the annulus of the MITRAL VALVE. It includes shortening the circumference of the annulus to improve valve closing capacity and reinforcing the annulus as a step in more complex valve repairs.

Narrowing of the passage through the MITRAL VALVE due to FIBROSIS, and CALCINOSIS in the leaflets and chordal areas. This elevates the left atrial pressure which, in turn, raises pulmonary venous and capillary pressure leading to bouts of DYSPNEA and TACHYCARDIA during physical exertion. RHEUMATIC FEVER is its primary cause.

A condition characterized by a combination of OSTIUM SECUNDUM ATRIAL SEPTAL DEFECT and an acquired MITRAL VALVE STENOSIS.

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