Letermovir versus valganciclovir to prevent CMV after heart transplant

VALganciclovir vs. LETermovir for Primary Prevention of CMV in Moderate to High-Risk Heart Transplant Recipients (The VALET-CMV Study)

Phase2; Phase3 Interventional Columbia University · NCT07079735

This trial will test whether letermovir or valganciclovir better prevents CMV viremia in adults at moderate-to-high CMV risk after a heart transplant.

Quick facts

PhasePhase2; Phase3
Study typeInterventional
Enrollment150 (estimated)
Ages18 Years to 99 Years
SexAll
SponsorColumbia University Academic / other
Locations2 sites (New York, New York and 1 other locations)
Trial IDNCT07079735 on ClinicalTrials.gov

What this trial studies

This is a multicenter, prospective, randomized two-arm study comparing letermovir to valganciclovir as primary CMV prophylaxis in adult heart transplant recipients at moderate-to-high serostatus risk. Participants will be randomized to receive letermovir (with acyclovir for HSV prophylaxis for six months) or valganciclovir and will be followed for CMV viremia, CMV disease, and safety outcomes including leukopenia and neutropenia. Low-risk patients will be monitored observationally to better characterize CMV outcomes in that group. The trial is designed to confirm whether letermovir provides similar protection against CMV with a more favorable blood-count safety profile compared with valganciclovir in the heart transplant population.

Who should consider this trial

Good fit: Adults aged 18 or older who have just received a heart transplant, are moderate-to-high CMV serostatus risk, and have not yet started CMV prophylaxis.

Not a fit: Patients with recent or suspected CMV disease within the prior six months, those who have already started CMV prophylaxis, or those at low CMV risk are unlikely to benefit from participation.

Why it matters

Potential benefit: If successful, letermovir could prevent CMV viremia after heart transplant while reducing rates of leukopenia and neutropenia compared with valganciclovir.

How similar studies have performed: Previous studies in kidney, lung, and hematopoietic stem cell transplant populations have shown letermovir to be non-inferior to valganciclovir with substantially less leukopenia and neutropenia, but prospective data in heart transplant recipients are lacking.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

Patients who are \>18 years of age who have received a heart transplant and have not started their CMV prophylaxis regimen will be included.

Exclusion Criteria:

History of or suspected CMV disease within 6 months prior is excluded.

Where this trial is running

New York, New York and 1 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions CMV ViremiaHeart Transplant InfectionHeart Transplant Failure and Rejection
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.