Mitral Valve Repair in the United States: Single-Center versus Multi-Center Surgeons' Risk-Adjusted Outcomes (13 words, 96 characters).

Background: Healthcare consolidation may force cardiac surgeons to operate at multiple centers. Little data exists as to this phenomenon's effect upon patients' quality of care as measured by risk-adjusted outcome (RAO) rates.

Objectives: To compare mitral valve repair (MVr) RAO rates between surgeons operating at multiple centers (MC) versus single-centers (SC); for MC surgeons, to compare MVr RAO rates between their primary and secondary centers.