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Minimally Invasive Mitral Valve Surgery Provides Excellent Outcomes Without Increased Cost: A Multi-Institutional

Emily A Downs1, Lily E Johnston1, Damien J LaPar1

  • 1Department of Surgery, Division of Thoracic and Cardiovascular Surgery, University of Virginia, Charlottesville, Virginia.

The Annals of Thoracic Surgery
|April 5, 2016
PubMed
Abstract

Insights

Minimally invasive mitral valve surgery (mini-MVR) offers comparable safety to conventional sternotomy. This approach leads to shorter hospital stays and fewer transfusions without increasing overall costs.

Area of Science:

  • Cardiovascular Surgery
  • Minimally Invasive Techniques
  • Health Economics

Background:

  • Minimally invasive mitral valve surgery (mini-MVR) is increasingly adopted, yet real-world data on its outcomes and costs are limited.
  • Concerns exist that mini-MVR may increase costs without clear benefits compared to traditional methods.
  • This study aimed to evaluate the real-world effectiveness and economic impact of mini-MVR in a multi-institutional setting.

Purpose of the Study:

  • To compare clinical outcomes and hospital costs of minimally invasive mitral valve surgery (mini-MVR) versus conventional sternotomy.
  • To determine if mini-MVR provides superior outcomes and assess its cost-effectiveness in a real-world, multi-institutional cohort.
  • To address the criticism that mini-MVR adds cost without significant benefit.

Main Methods:

  • A multi-institutional database was used to extract records of patients undergoing isolated mitral valve surgery between 2011 and 2014.
  • Patients were stratified into minimally invasive (right chest) or conventional sternotomy groups and propensity matched based on demographics and comorbidities.
  • Clinical outcomes (mortality, stroke, complications) and total hospital costs were compared between the matched groups.

Main Results:

  • In a propensity-matched analysis of 355 patients per group, mini-MVR showed similar rates of mortality, stroke, and major complications compared to conventional sternotomy.
  • Patients undergoing mini-MVR experienced significantly shorter intensive care unit and hospital lengths of stay.
  • Fewer blood transfusions were required for patients undergoing mini-MVR, and total hospital costs were comparable between the two approaches.

Conclusions:

  • Minimally invasive mitral valve surgery (mini-MVR) demonstrates comparable major morbidity rates to conventional sternotomy in real-world practice.
  • Mini-MVR is associated with improved resource utilization, including shorter hospital stays and reduced transfusion needs.
  • Contrary to initial hypotheses, mini-MVR can be performed at similar total hospital costs, offering superior outcomes without increased expenditure in select patients.

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