Degenerative Mitral Valve Repair Restores Life Expectancy

Area of Science:

• Cardiovascular Surgery
• Cardiac Surgery Outcomes
• Medical Statistics

Background:

• Degenerative mitral regurgitation requires mitral valve repair (MVr) as the gold standard treatment.
• Medical management of severe degenerative mitral regurgitation is associated with a poor prognosis.
• Despite the benefits of MVr, many eligible patients remain untreated, necessitating an investigation into long-term survival outcomes.

Purpose of the Study:

• To determine if mitral valve repair (MVr) restores normal life expectancy in patients with degenerative mitral regurgitation.
• To compare the long-term survival of patients who underwent MVr with the general US population's life expectancy.
• To assess the impact of age at operation on post-MVr life expectancy.

Main Methods:

• A retrospective study of 1011 patients undergoing isolated MVr for degenerative mitral regurgitation (2003-2017).
• Parametric distribution analysis and Weibull probability plots were used to analyze long-term mortality data.
• Comparison of post-MVr life expectancy with the general US population across different age decades (20-89 years).

Main Results:

• Patients undergoing MVr experienced a life expectancy matching the general US population for ages 40-89.
• Confidence intervals indicated that additional life expectancy after MVr was comparable to the general population.
• Survival appeared normative for younger patients (20-39 years), though predictability was limited by fewer deaths.

Conclusions:

• Degenerative mitral valve repair (MVr) effectively restores anticipated life expectancy to general population levels across a wide age range.
• These findings emphasize the critical importance of MVr for patients with degenerative mitral disease.
• Further research with larger cohorts and extended follow-up is recommended, especially for younger patient groups.