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Escalating Surgical Treatment for Left Ventricular Assist Device Infection and Expected Mortality: Clinical Risk

Michael J Finnan1, David Chi1, Sarah N Chiang1

  • 1From the Divisions of Plastic and Reconstructive Surgery (Finnan, Chi, Chiang, Kells, Fox), Department of Medicine, Washington University School of Medicine, St Louis, MO.

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Summary

Left ventricular assist device (LVAD) infections (VSI) affect survival, but a new risk score helps predict outcomes. Early surgical intervention, like flap reconstruction, may improve survival in VSI patients.

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Area of Science:

  • Cardiology
  • Infectious Disease
  • Surgical Innovation

Background:

  • Left ventricular assist devices (LVADs) improve cardiac failure survival but are complicated by LVAD-specific infections (VSIs).
  • Predictive risk factors and treatment strategies for VSIs are not well understood.
  • Understanding VSI management, from medical treatment to surgical interventions like debridement and flap reconstruction, is crucial.

Purpose of the Study:

  • To identify risk factors for mortality in patients with LVAD-specific infections (VSIs).
  • To develop a clinical risk prediction score for stratifying mortality risk in VSI patients.
  • To evaluate the impact of different management strategies on survival after VSI.

Main Methods:

  • Retrospective review of patients undergoing primary LVAD implantation.
  • Cox proportional hazards regression analysis to identify mortality predictors.
  • Development of a clinical risk prediction score based on identified factors.

Main Results:

  • 34% of LVAD patients developed VSI; 1-year survival post-infection was 85%.
  • Independent mortality predictors included diabetes, MRSA, deep space infection, and ECMO use.
  • Flap reconstruction and MSSA infection were associated with decreased mortality.
  • The developed risk score effectively stratified patients into low, intermediate, and high-risk groups with distinct survival rates.

Conclusions:

  • A novel clinical risk prediction score can stratify patients with LVAD-specific infections (VSIs).
  • Escalating surgical treatment, particularly flap reconstruction, is linked to improved survival in selected VSI cases.
  • Further research is needed to confirm the benefits of early surgical intervention for VSI outcomes.