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Relationship between renal function and left ventricular assist device use.

Javed Butler1, Carrie Geisberg, Renee Howser

  • 1Cardiology Division, Vanderbilt University, Nashville, Tennessee, USA. javed.butler@vanderbilt.edu

The Annals of Thoracic Surgery
|April 25, 2006
PubMed
Summary
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Patients with poor baseline renal function have worse outcomes after left ventricular assist device (LVAD) implantation. However, LVADs improve renal function, leading to better survival rates.

Area of Science:

  • Cardiology
  • Nephrology
  • Medical Devices

Background:

  • Pre-existing renal dysfunction can negatively impact outcomes in patients undergoing left ventricular assist device (LVAD) implantation.
  • LVADs may enhance circulatory function, potentially leading to improvements in renal function.

Purpose of the Study:

  • To investigate the association between baseline renal function and outcomes following LVAD implantation.
  • To evaluate the changes in renal function after LVAD placement and their impact on patient survival.

Main Methods:

  • Retrospective analysis of 220 patients who received LVADs.
  • Assessment of creatinine clearance (CrCl) changes and categorization into quartiles based on baseline CrCl.
  • Comparison of post-LVAD outcomes across different CrCl groups.

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Main Results:

  • Lower baseline CrCl was significantly associated with worse 6-month and 12-month survival rates on LVAD support.
  • Patients in the lowest CrCl quartile faced a higher risk of mortality post-implantation.
  • A substantial and rapid improvement in CrCl was observed within the first week post-LVAD implantation, particularly in patients with severely impaired renal function.
  • Recovery of renal function to CrCl > 50 mL/min showed a trend towards better 30-day survival.

Conclusions:

  • Impaired baseline renal function is a significant predictor of adverse outcomes after LVAD implantation.
  • LVAD therapy can lead to significant and rapid improvements in renal function among survivors.
  • Careful patient selection is crucial for optimizing outcomes in LVAD therapy, considering the interplay between renal function and device support.