COMPARATIVE STUDY
JOURNAL ARTICLE
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Outcomes of Valve Repair for Degenerative Disease in Patients With Mitral Annular Calcification.

BACKGROUND: The risk factors for the development of mitral annular calcification (MAC) in degenerative mitral valve disease and the effect it may have on patient-and valve-related outcomes require further evaluation.

METHODS: Between January 2002 and December 2015, 627 patients underwent mitral valve operations for degenerative disease. MAC was seen in 75 patients (12%); 73 (97%) underwent valve repair (6 without annuloplasty ring implantation) and 2 (3%) underwent valve replacement after an unsuccessful repair attempt.

RESULTS: MAC was linked to patient age, female sex, and degenerative disease subtype. Early mortality was comparable between patients with and without MAC (3 of 75 [4%] vs 10 of 552 [2%], p = 0.20]. In patients with MAC, one-third of the deaths were directly related to annular decalcification and reconstruction. Early repair failure was more common in patients with MAC (8 of 75 [11%] vs 17 of 552 [3%], p = 0.006). During follow-up, no differences in overall survival or freedom from late reintervention were observed. However, at 8 years after the operation, freedom from recurrent mitral regurgitation was worse in patients with MAC. In these patients, repair failure was linked to nonuse of ring annuloplasty. For patients with MAC in whom annular decalcification and annuloplasty were performed, repair durability was comparable to patients without MAC.

CONCLUSIONS: Mitral valve surgery in degenerative disease accompanied by MAC is safe. Optimal surgical strategy includes annular decalcification (when this would prevent implantation of an annuloplasty ring) and ring annuloplasty and will lead to results similar to patients without MAC. However, repair performance is hampered when the annulus is not addressed. For these patients, alternative repair techniques should be explored in the future.

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