Condition
Hypoplastic Left Heart Syndrome clinical trials and research
As of November 12, 2026, Find a Trial lists 3 Hypoplastic Left Heart Syndrome clinical trials that are recruiting, at sites in 10 countries (most in France (1), Japan (1), Austria (1)). By phase: Phase 3 (1). Every study is explained in plain English. Data from ClinicalTrials.gov and NIH RePORTER, updated November 12, 2026.
- 3Clinical trials
- 10Countries
Newest Hypoplastic Left Heart Syndrome clinical trials
| Study | Phase | Where | Status | Registered |
|---|---|---|---|---|
| Prenatal maternal mental health and infant brain development in congenital heart defects | — | Marseille and 4 other locations | Recruiting | Dec 2, 2024 |
| Evaluating fetal aortic valve balloon dilation for congenital heart defects | — | San Francisco, California and 12 other locations | Recruiting | May 23, 2022 |
| Infusing a child's own heart stem cells during single-ventricle surgery (APOLLON) | Phase 3 | Kanagawa and 3 other locations | Recruiting | May 25, 2016 |
All recruiting trials (3)
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Prenatal maternal mental health and infant brain development in congenital heart defects
See if prenatal maternal psychological distress is linked to neurodevelopment at age one in babies with prenatally diagnosed critical cyanotic congenital heart defects who need neonatal open-heart surgery.
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Evaluating fetal aortic valve balloon dilation for congenital heart defects
This study is testing whether a procedure called fetal aortic valvuloplasty can help fetuses with aortic valve problems caused by hypoplastic left heart syndrome feel better and have better outcomes.
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Infusing a child's own heart stem cells during single-ventricle surgery (APOLLON)
This trial will try injecting a child's own cardiac stem/progenitor cells into the coronary arteries after Glenn or Fontan surgery to help children with a functional single ventricle and reduced ejection fraction.
Related topics
Quick answers
How many Hypoplastic Left Heart Syndrome clinical trials are recruiting right now?
3, as of November 12, 2026. We update this list each time we refresh our data from ClinicalTrials.gov.
Where are these trials running?
In 10 countries. The most sites are in France (1 trial), Japan (1 trial), Austria (1 trial), Canada (1 trial), Finland (1 trial). Each study page lists its sites and which ones are recruiting.
What phases are they in?
Phase 3: 1. Trials with no phase listed are usually device, behavioural or observational studies.
How do I join one?
Open a study, check the "Is this trial a fit for you?" section, then contact the study team listed on the page. They will ask a few screening questions. Asking is free and does not commit you to anything. Talk it over with your doctor first.
Find the studies that fit you
A list is a starting point. Tell us your situation in your own words and we'll rank the studies that match and explain why. It's free and needs no account.