Clinical trial Recruiting at 1 site Interventional Ages 18 to 75

Transplanting heart tissue to aid recovery after heart surgery

Official title: Autologous Atrial Appendage Micrografts Transplanted During Coronary Artery Bypass Surgery: the AAMS2 Randomized, Double-blinded, and Placebo-controlled Trial

Run by Hospital District of Helsinki and Uusimaa · NCT05632432 · Data updated 2026-11-12

This study is testing if using small pieces of heart tissue from patients' own hearts during surgery can help them heal better and improve heart function after dealing with heart disease and heart failure.

More Coronary Artery Disease trials

Quick facts

Study typeInterventional
Ages18 Years to 75 Years
SexAll
Enrollment50 (estimated)
SponsorHospital District of Helsinki and Uusimaa
Academic / other
Locations1 site (Helsinki, Uusimaa)
StatusRecruiting
StartedApril 1, 2024
Main results expectedJanuary 31, 2026
Study endsDecember 31, 2026
Registry record updatedApril 19, 2024
Trial IDNCT05632432 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are patients with ischemic heart disease and heart failure symptoms classified as NYHA Class II-IV, with a left ventricular ejection fraction between 15% and 40%.

Probably not a fit

Patients with heart failure due to left ventricular outflow tract obstruction or those who have had an acute myocardial infarction within the last 30 days may not benefit from this study.

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

What this trial studies

This clinical trial investigates the use of atrial appendage micrografts harvested from patients' own heart tissue during coronary artery bypass surgery. The trial aims to assess the effectiveness of these micrografts in promoting cardiac healing and improving heart function in patients suffering from ischemic heart disease and heart failure. Participants will undergo a randomized controlled and double-blinded approach to evaluate the outcomes of this innovative treatment. The study will also involve various assessments, including echocardiography and cardiac MRI, to monitor heart function and tissue response.

Why it matters

Potential benefit: If successful, this approach could significantly enhance heart repair and improve quality of life for patients with ischemic heart disease and heart failure.

How similar studies have gone: While the use of autologous tissue for cardiac repair is a promising area, this specific approach of using atrial appendage micrografts is novel and has not been extensively tested in prior studies.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Informed consent obtained
* Left ventricular ejection fraction (LVEF) between ≥ 15% and ≤ 40% at recruitment (transthoracic echocardiography)
* New York Heart Association (NYHA) Class II-IV heart failure symptoms

Exclusion Criteria:

* Heart failure due to left ventricular outflow tract obstruction
* Acute myocardial infarction (AMI) within last 30 days
* History of life-threatening and possibly repeating ventricular arrhythmias or resuscitation, or an implantable cardioverter-defibrillator
* Stroke or other disabling condition within 3 months before screening
* Severe valve disease or scheduled valve surgery
* Renal dysfunction (GFR \<45 ml/min/1.73m2)
* Other disease limiting life expectancy
* Contraindications for coronary angiogram or LGE-CMRI
* Participation in some other clinical trial

Screening Failure:

* After optimization of medications, no visible scar or LVEF ≥ 50% in preoperative LGE-CMRI
* Preoperative LGE-CMRI has not been performed prior scheduled CABG

Where it's running

  • Hospital District of Helsinki and Uusimaa, Helsinki University Hospital, Heart and Lung Center & Cardiac Unit
    Helsinki, Uusimaa, Finland
    Recruiting

Study contacts

  • Principal investigator: Antti Nykänen, Docent — Hospital District of Helsinki and Uusimaa
  • Study coordinator: Antti Nykänen, Docent
  • Email: antti.nykanen@hus.fi
  • Phone: 050 427 0625

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.