A comparison of early results of non-resection techniques for correcting degenerative mitral regurgitation

Aim: To compare the early outcomes of chordal transposition and chordal replacement techniques in degenerative mitral regurgitation.

Methods: 58 adult patients (mean age 57(49;64) years, 21 female) with severe degenerative type II MR (ERO 43(30;50) mm²) underwent primary MV repair were included in the prospective study. 94,7% of patients were in NYHA class II or III before surgery. The patients were randomized in two groups: 1) chordal transposition – CT – 30 patients, 2) chordal replacement – CR – 28 patients. Mitral prosthetic ring implantation was performed in all cases. Transthoracic echocardiography was performed one year after surgery.

Results: Successful MV repair was accomplished in all patients without conversion to valve replacement. Both groups had comparable structural and functional ultrasound heart characteristics in postoperative period. Patients in both groups had not recurrent MR more than 1 degree (39,7% with MR 1 degree). Systolic anterior motion of the MV and iatrogenic mitral stenosis after valve repair were not detected. One patient had an ischemic stroke in early postoperative period in CR group. Any secondary endpoint was not reached in either group.

Conclusion: Compared non-resection techniques are effective comparable methods of MV reconstruction with good early outcomes.

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