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Original Articles: Adult Cardiac

Early Clinical Experience and Echocardiographic Results With a New Semirigid Mitral Annuloplasty Ring: The Sorin Memo 3D

^a Department of Cardiac Surgery, Echocardiography Unit, Ospedale Civile di Legnano, Milan, Italy
^b Department of Anesthesia and Critical Care, Echocardiography Unit, Ospedale Civile di Legnano, Milan, Italy
^c Department of Cardiology, Echocardiography Unit, Ospedale Civile di Legnano, Milan, Italy

Accepted for publication July 10, 2009.

^_* Address correspondence to Dr Bruno, Department of Cardiac Surgery, Ospedale Civile di Legnano, Via Candiani 2, Legnano, Milan, 20025, Italy (Email: piergiorgiob{at}yahoo.it).

Background: The Sorin Memo 3D (Sorin Biomedica Cardio S.r.L., Saluggia, Italy) is a new, complete semirigid annuloplasty ring. Clinical use, outcomes, and echocardiographic results are reported as an evaluation of its safety and efficacy in the treatment of mitral valve regurgitation (MVR).

Methods: This device was assessed in 63 patients (63.5% men; mean age, 70.2 ± 10.3 years) who underwent MVR operations between January 2007 and June 2008. Functional classification was normal leaflet motion (type I; 1.6%), leaflet prolapse (type II; 66.7%), and restricted leaflet motion (type III; 31.7%). Valve disease was degenerative (68.25%), ischemic (25.4%), and nonischemic dilated cardiomyopathy (6.35%).

Results: Early mortality (30 days) was 3.3% (2 patients). Late mortality (11.2 ± 5.1 months) was 4.9% (3 patients). No deaths were device-related. Thromboembolic stroke occurred in 3.3% and endocarditis in 1.6%. Freedom from reoperation was 98.4%. At 6 months, MVR was grade 0/1 in 93.7% and grade 2+ in 6.4%. Left end-diastolic ventricular diameters decreased significantly from 59.3 ± 6.9 mm preoperatively to 50.6 ± 12.2 mm at 6 months, pulmonary arterial pressure decreased from 44.8 ± 7.1 mm Hg to 38.4 ± 5.5 mm Hg, and left ventricular ejection fraction increased significantly from 0.469 ± 0.129 to 0.582 ± 0.106. New York Heart Association functional class was I in 81% and II in 13.8%.

Conclusions: Early results indicate the Sorin Memo 3D ring safely and effectively minimizes secondary MVR resulting from all causes and preserves mitral annular flexibility and function at follow-up.