Can dd-cfDNA Transform Rejection Surveillance? | A webinar presented by Natera

Published 03 October 2025
  • Advanced Heart Failure & Transplantation
  • Cardiology
  • Cardiothoracic Surgery
  • Education
  • Industry
  • News

Next month, a one-hour webinar will bring together leading transplant experts to unveil the latest findings from the DEFINE-HT study and explore the clinical utility of donor-derived cell-free DNA (dd-cfDNA) with Donor Quantity Score (DQS) in heart transplantation.

This webinar will highlight how these innovations improve detection of rejection, reduce reliance on invasive biopsies, and pave the way for more personalized patient management.

Attendees will gain first-hand insights into how dd-cfDNA testing—enhanced by a two-threshold approach—outperforms traditional surveillance, reduces false positives, and enables earlier, more accurate interventions to protect graft health and improve outcomes.

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DEFINE-HT Study Initial Results 

  • First multicenter, longitudinal study linking dd-cfDNA to clinical outcomes in heart transplantation
  • Elevated dd-cfDNA percentage and DQS associated with an increased risk of poor one-year outcomes

The Two-Threshold Algorithm: Fraction + DQS

  • How integrating dd-cfDNA fraction (%) and quantity (DQS) improves sensitivity and specificity
  • Real-World Clinical Application—Case studies where dd-cfDNA with DQS changed patient management

SPEAKERS:

Headshot of Palak ShahPalak Shah, MD, MS, FACC, FHFSA, FAHA
Medical Director, Mechanical Circulatory Support
Director, Heart Failure Research
Inova Schar Heart and Vascular
Woodburn, VA USA

Headshot of Shelley HallShelley Hall, MD, FACC, FHFSA, FAST
Chief of Transplant Cardiology, Mechanical Circulatory Support, and Advanced Heart Failure
Baylor University Medical Center
Dallas, TX USA

 

 

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