Mitral valve surgery in octogenarians: long-term and hemodynamic results.

Background: Octogenarians are often denied mitral valve (MV) surgery secondary to concerns over increased perioperative morbidity and mortality. The objective of this study was to examine the outcomes of octogenarians undergoing mitral valve repair (MVr) and replacement (MVR).

Methods: The outcomes of 139 patients between the ages of 80-90 who underwent MVR/MVr between 2004-2018 at the Mazankowski Alberta Heart Institute (Edmonton, AB, Canada) were retrospectively analyzed. Follow-up was extended to a maximum of 15.8 years.

Results: Following MVR, all-cause mortality at 30 days, 1 year, 5 years, 10 years, and the longest follow-up was 7%, 14%, 36.3%, 61.8%, and 67.7%, respectively. Post-MVr, all-cause mortality at the same time points was 1.9%, 7.6%, 22.5%, 55.5%, and 100%, respectively. During the Hospitalization Index, rates of new-onset atrial fibrillation, sepsis, acute kidney injury, superficial sternal wound infection, deep sternal wound infection, mediastinal bleeding, and permanent pacemaker insertion ranged from 22.1-34.0%, 3.8-11.0%, 7.6-22.0%, 1.9-2.4%, 0-1.2%, 0%, and 0-6.1%, respectively. Rates of overall rehospitalization, as well as readmission for heart failure, stroke, myocardial infarction, and MV reoperation ranged from 71.0-85.5%, 52.2-63.3%, 10.9-22.8%, 1.9-6.0%, and 0% during the follow-up period. There were significant reductions in peak MV gradient (P=0.042) and left ventricular internal diameter in diastole (LVIDd; P=0.008) post-MVR, as well as LVIDd (P<0.001) and Left Atrial (LA) Volume Index (P=0.019) post-MVr.

Conclusions: Octogenarians exhibit positive left atrial and left ventricular remodeling following MVR. Perioperative morbidity is low, late survival is reasonable, and long-term morbidity is considerable. Overall, these results add to the growing literature that MV surgery is relatively safe and effective in octogenarians.