Arrhythmogenic risks of stem cell replacement therapy for cardiovascular diseases
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Updated: Dec 29, 2025

Intramyocardial Cell Delivery: Observations in Murine Hearts
Published on: January 24, 2014
Kang Chen1, Yuting Huang2, Radhika Singh3
1Department of Cardiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Insights
Stem cell therapy shows promise for heart repair, but potential risks like cardiac arrhythmia require careful consideration of cell sources and electrical function. Further research is essential for safe cardiac regeneration.
Area of Science:
- Cardiology
- Regenerative Medicine
- Biomedical Engineering
Background:
- Ischemic heart disease and congestive heart failure cause significant mortality.
- Myocardial infarction affects 1.5 million Americans annually.
- Current treatments cannot repair damaged cardiomyocytes.
Purpose of the Study:
- To review stem cell sources for cardiac regeneration.
- To discuss the arrhythmogenic risks associated with stem cell therapy.
- To address safety concerns in stem cell-based cardiac repair.
Main Methods:
- Literature review of stem cell sources for cardiac regeneration.
- Analysis of safety data from clinical trials.
- Evaluation of electrical properties of stem cell-derived cardiomyocytes.
Main Results:
- Stem cell therapy is a promising approach for generating new cardiomyocytes.
- Concerns exist regarding electrical dysfunctions and cardiac arrhythmia post-therapy.
- Different cell sources may pose varying arrhythmogenic risks.
Conclusions:
- Stem cell therapy offers potential for heart regeneration.
- Careful selection of cell sources is crucial to mitigate arrhythmogenic risks.
- Further research is needed to ensure the safety and efficacy of stem cell therapy for heart disease.
Abstract:
Ischemic heart disease and congestive heart failure are major contributors to high morbidity and mortality. Approximately 1.5 million cases of myocardial infarction occur annually in the United States; the yearly incidence rate is approximately 600 cases per 100,000 people. Although significant progress to improve the survival rate has been made by medications and implantable medical devices, damaged cardiomyocytes are unable to be recovered by current treatment strategies. After almost two decades of research, stem cell therapy has become a very promising approach to generate new cardiomyocytes and enhance the function of the heart. Along with clinical trials with stem cells conducted in cardiac regeneration, concerns regarding safety and potential risks have emerged. One of the contentious issues is the electrical dysfunctions of cardiomyocytes and cardiac arrhythmia after stem cell therapy. In this review, we focus on the cell sources currently used for stem cell therapy and discuss related arrhythmogenic risk.
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