A Study to Evaluate Intramyocardial Injection of Autologous Umbilical Cord Blood Derived Mononuclear Cells During Surgical Repair of Hypoplastic Left Heart Syndrome


About this study

The purpose of this study is to determine the safety and feasibility of injections of autologous umbilical cord blood (UCB) cells into the right ventricle of Hypoplastic Left Heart Syndrome (HLHS) children undergoing a scheduled Glenn surgical procedure. The investigators are doing this research study to find out if autologous stem cells from the individual's own umbilical cord blood can be used to strengthen the muscle of the right side of their heart. This will help determine the safety and feasibility of using cell-based regenerative therapy as an additional treatment for the management of HLHS.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria:

  • Diagnosis of HLHS or HLHS variant with single right ventricular dependent CHD having undergone Stage I surgical repair and undergoing Stage II surgical repair.
  • Less than 13 months of age at time of Stage II surgical repair.
  • Previous participation in the UCB collection protocol with autologous UCB-MNC product that is acceptable for use (treatment arm only).

Exclusion Criteria:

  • History of DMSO reaction (treatment arm only).
  • Parent(s) and/or legal guardian(s) unwilling to have their child participate or unwilling to follow the study procedures.
  • Severe chronic diseases at the discretion of the treating physician.
  • Extensive extra-cardiac syndromic features.
  • Known history of cancer.
  • Any of the following complications of his/her congenital heart disease:
    • Any condition requiring urgent, or unplanned interventional procedure within 15 days prior to Stage II surgical repair, unless complete and full cardiac recovery is documented by site investigator;
    • Severe pulmonary hypertension (reported in the medical record as > 70% systemic pressure);
    • Other clinical concerns as documented by a site investigator that would predict (more likely to happen than not to happen) a risk of severe complications or very poor outcome, not directly related to the stem cell product or its injection procedure, during or after Stage II surgical repair.


Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status

Rochester, Minn.

Mayo Clinic principal investigator

Frank Cetta, M.D.

Closed for enrollment

More information


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