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NCT Number: NCT07347197

Endocardial Delivery for Myocardial Regeneration Using Allogeneic iPSC-derived Cardiomyocyte Spheroids for HF With Systolic Dysfunction (EMERALD Study)

The purpose of this clinical study is to evaluate the safety and efficacy of endocardial delivery of HS-001 CS into severe heart failure patients with reduced ejection fraction for 26 weeks after transplantation.

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Key information

About this study

This is a multicenter, open-label, phase I/II study in 14 severe heart failure patients with reduced ejection fraction.

After screening period is completed, subjects undergo HS-001 CS transplantation by endocardial delivery. After transplantation, subjects take immunosuppressant and have efficacy/safety assessments.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Patients with resting left ventricular ejection fraction (LVEF) ≦40% based on institutional assessment on screening echocardiographic assessment
  • New York Heart Association (NYHA) cardiac function classification of grade II or III at screening
  • Other Criteria apply, please contact the investigator

Exclusion criteria

  • Patients with cardiac devices such as pacemakers, implantable cardioverter defibrillators (ICDs), or cardiac resuscitation-enabled implantable cardioverter defibrillators (CRT-Ds)
  • Patients with heart failure due to the primary disease hypertrophic cardiomyopathy (including the dilated phase), restrictive cardiomyopathy, amyloidosis, takotsubo cardiomyopathy, congenital heart disease, cardiac sarcoidosis, or constrictive pericarditis
  • Other Criteria apply, please contact the investigator

Treatment and study plan

HS-005

Combination Product

Human (allogeneic) iPS-cell-derived cardiomyocyte spheroids (HS-001CS) transplantation with endocardial delivery systems

Primary outcomes

  1. Safety and Tolerability

    Time frame: 26 weeks post-transplant

    Adverse events and safety in the 26 weeks after HS-005 administration

Secondary outcomes

  1. Left Ventricular Ejection Fraction in Cardiac MRI scan

    Time frame: 26 weeks and 52 weeks post-transplant

    Left Ventricular Ejection Fraction in the 26 weeks and 52 weeks after HS-005 administration

  2. Left Ventricular Ejection Fraction in Echocardiography

    Time frame: 26 weeks and 52 weeks post-transplant

    Left Ventricular Ejection Fraction in the 26 weeks and 52 weeks after HS-005 administration

  3. Left Ventricular volume in Cardiac MRI scan

    Time frame: 26 weeks and 52 weeks post-transplant

    Left Ventricular volume in the 26 weeks and 52 weeks after HS-005 administration

  4. Left Ventricular volume in Echocardiography

    Time frame: 26 weeks and 52 weeks post-transplant

    Left Ventricular volume in the 26 weeks and 52 weeks after HS-005 administration

  5. Myocardial wall motion evaluation in MRI

    Time frame: 26 weeks and 52 weeks post-transplant

    Myocardial wall motion evaluation (Index of myocardial strain) in the 26 weeks and 52 weeks

  6. Myocardial wall motion evaluation in Echocardiography

    Time frame: 26 weeks and 52 weeks post-transplant

    Myocardial wall motion evaluation (Index of myocardial strain) in the 26 weeks and 52 weeks

  7. Myocardial blood flow in SPECT

    Time frame: 26 weeks and 52 weeks post-transplant

    Myocardial blood flow in the 26 weeks and 52 weeks

  8. Myocardial viability in SPECT

    Time frame: 26 weeks and 52 weeks post-transplant

    Myocardial viability in the 26 weeks and 52 weeks

  9. 6-minute walk distance

    Time frame: 26 weeks and 52 weeks post-transplant

    6-minute walk distance in the 26 weeks and 52 weeks

  10. N-terminal Pro-brain Natriuretic Peptide (NT-proBNP)

    Time frame: 26 weeks and 52 weeks post-transplant

    NT-proBNP measurement in the 26 weeks and 52 weeks

  11. QoL questioner (Kansas City Cardiomyopathy Questionnaire)

    Time frame: 26 weeks and 52 weeks post-transplant

    KCCQ evaluation in the 26 weeks and 52 weeks

  12. QoL questioner (EuroQol 5 dimensions 5-level)

    Time frame: 26 weeks and 52 weeks post-transplant

    EQ-5D-5L evaluation in the 26 weeks and 52 weeks

Study contacts

Contact information is provided by the study sponsor or research team.

Heartseed Inc.

CONTACT

[email protected]

+8163801068

Sponsors and collaborators

Lead sponsor

Heartseed Inc.

Industry

Registry information

Official study title

A Phase I/II Study of Endocardial Delivery for Myocardial Regeneration Using Human Induced Pluripotent Stem (iPS) Cell-derived Cardiomyocyte Spheroids for Heart Failure Reduced Ejection Fraction

Acronym: EMERALD

Important dates

Study start
2026
Primary completion
2028
Study completion
2030
First posted
Jan 16, 2026
Registry last updated
Jan 16, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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