Short- and long-term results after prosthetic mitral valve implantation in patients with severe mitral annulus calcification

Ronny Ben-Avi, Boris Orlov, Leonid Sternik, Alexander Kogan, Rafael Kuperstien, Amjad Shalabi, Eilon Ram, Alexander Lipey, Ehud Raanani

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

OBJECTIVES: To investigate short- and long-term outcomes of a conservative decalcification approach in mitral valve replacement (MVR) surgery in the presence of mitral annulus calcification (MAC). METHODS: Of the 1038 patients who underwent MVR, 133 (13%) had significant MAC with at least 30% of the annular circumference heavily calcified. In most patients, the surgical approach to MAC included conservative decalcification, supra-annular prosthesis implantation and insertion of a pericardial patch between the MV annulus and the prosthesis. These patients were matched by a propensity score to a group of patients who underwent MVR without MAC (n = 118 in each group) and served as a control group. RESULTS: There were 6 early deaths in each group with an overall mortality of 5% (P = 0.90). Early complications included one major stroke in the non-MAC group and acute renal failure needing dialysis in 2 and 3 patients in the MAC and non-MAC groups, respectively. Mean follow-up was 55 ± 37 months and 99.1% complete. There were 38 (33%) and 33 (29%) late deaths with an estimated survival of 61% and 69% at 6 years in the MAC and non-MAC groups, respectively (P = 0.55). At follow-up, functional class did not differ between groups (P = 0.096). Mean echo follow-up time was 40 ± 35 months and was 83% complete. Freedom from moderate or severe mitral regurgitation was 95% and 98%, with an estimated freedom of 95% and 96% at 6 years (P = 0.20), and mean gradient was 4.9 ± 2.3 mmHg and 5.2 ± 2.0 mmHg for MAC and non-MAC groups, respectively (P = 0.58). CONCLUSIONS: A conservative approach for dealing with MAC is suitable for the majority of patients. Early and late clinical and echocardiographic outcomes did not differ between the MAC and non-MAC patients, including freedom from early and late occurrence of MV prosthesis paravalvular leak.

Original languageEnglish
Pages (from-to)876-881
Number of pages6
JournalInteractive Cardiovascular and Thoracic Surgery
Volume24
Issue number6
DOIs
StatePublished - 1 Jun 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© The Author 2017. Published by Oxford University Press on behalf of the European Association for Cardio-Thoracic Surgery.

Keywords

  • Mitral annular calcification
  • Mitral valve replacement
  • Surgical outcome

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