Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 18 and up

Inhaled milrinone and epoprostenol before heart surgery to ease weaning from bypass

Official title: Inhaled Milrinone and Epoprostenol for the Prevention of Difficult Cardiac Pulmonary Bypass Separation: A Randomized, Double-blind, Controlled Trial

Run by Montreal Heart Institute · NCT05450328 · Data updated 2026-11-12

This trial tests whether inhaled milrinone and epoprostenol given before starting cardiopulmonary bypass can help people with right heart trouble during cardiac surgery.

More Right Ventricular Dysfunction trials

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment141 (estimated)
SponsorMontreal Heart Institute
Academic / other
Locations1 site (Montreal, Quebec)
StatusRecruiting
StartedDecember 10, 2025
Main results expectedMay 1, 2028
Study endsDecember 1, 2028
Registry record updatedJune 25, 2026
Trial IDNCT05450328 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults 18 or older undergoing CPB-assisted cardiac surgery with right ventricular dysfunction or pulmonary hypertension, without exclusion criteria listed.

Probably not a fit

Patients with contraindications to epoprostenol or milrinone, certain congenital conditions, or those undergoing urgent surgery may not benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This randomized, double-blind, controlled study investigates whether pre-emptive inhaled milrinone and epoprostenol improve outcomes for adults undergoing cardiac surgery with cardiopulmonary bypass who have right ventricular dysfunction or pulmonary hypertension. Participants receive the inhaled combination before bypass initiation or a placebo, with the goal of smoother weaning from bypass and better perioperative stability. The trial evaluates hemodynamic parameters, perioperative metrics, and postoperative outcomes to determine potential benefits and safety of the combination therapy. Eligible patients include adults undergoing CPB-assisted cardiac surgery at Montreal Heart Institute; those with certain cardiomyopathies, prior heart transplant or VAD, urgent surgeries, or monitoring contraindications are excluded. The study aims to clarify whether this approach reduces difficult CPB separation and improves recovery.

Why it matters

Potential benefit: If successful, patients could experience easier separation from bypass, more stable hemodynamics, and improved postoperative recovery.

How similar studies have gone: Previous work suggests inhaled vasodilators and inotropes can influence hemodynamics during CPB, but this exact combination before CPB is novel/experimental.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

\- Only patients undergoing cardiac surgery with CPB and aged 18 years and older will be included in this study.

Exclusion Criteria:

* The presence of congenital cardiomyopathy, which the correction is the primary objective of the proposed surgery. For example, a patient who requires surgery for atrial septal defect closure only would not be eligible for the study. On the other hand, a patient who undergoes this same surgery in addition to a valve replacement, for example, would be eligible to participate in the study.
* Heart transplant or ventricular assist device surgery
* Urgent surgery including hemodynamic instability requiring vasopressor agents upon arrival in the operating room
* A contraindication to transesophageal ultrasound monitoring or the presence of an unstable cervical spine.
* Presence of a contraindication related to Epoprostenol or Milrinone administration such as a documented left ventricular or right ventricular outflow tract obstruction, a severe unaddressed aortic stenosis, or a documented allergy to either of these two molecules.

Where it's running

  • Montreal Heart Institute
    Montreal, Quebec, Canada
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.