Question: Are there clinical trials using stem cells for the treatment of cardiac disease?

Context:
Therapy with mesenchymal stem cells is one of the promising tools to improve outcomes after myocardial infarction. Adipose-derived stem cells (ASCs) are an ideal source of mesenchymal stem cells due to their abundance and ease of preparation.
Furthermore, several ongoing clinical trials using ASCs are producing promising results for heart diseases.
Among the cell types under investigation, adult mesenchymal stem cells are widely studied, and in early stage, clinical studies show promise for repair and regeneration of cardiac tissues.
 Accumulating data from preclinical and early phase clinical trials document their safety when delivered as either autologous or allogeneic forms in a range of cardiovascular diseases, but also importantly define parameters of clinical efficacy that justify further investigation in larger clinical trials. 
several ongoing clinical trials using ASCs are producing promising results for heart diseases. 
Clinical application of adult stem cells for therapy for cardiac disease.
Stem cell-based therapies have the potential to fundamentally transform the treatment of ischemic cardiac injury and heart failure by achieving what would have been unthinkable only a few years ago-the Holy Grail of myocardial regeneration. Recent therapeutic approaches involve bone marrow (BM)-derived mononuclear cells and their subsets such as mesenchymal stem/stromal cells (MSCs), endothelial progenitor cells as well as adipose tissue-derived MSCs, cardiac tissue-derived stem cells, and cell combinations. Clinical trials employing these cells have demonstrated that cellular therapy is feasible and safe.
Accumulating data from preclinical and early phase clinical trials document their safety when delivered as either autologous or allogeneic forms in a range of cardiovascular diseases, but also importantly define parameters of clinical efficacy that justify further investigation in larger clinical trials.
se of stem and precursor cells as a therapeutic agent for chronically injured organs. Among the cell types under investigation, adult mesenchymal stem cells are widely studied, and in early stage, clinical studies show promise for repair and regeneration of cardiac tissues. 
Over the past 2 decades, there have been numerous stem cell studies focused on cardiac diseases, ranging from proof-of-concept to phase 2 trials. 
Small uncontrolled clinical trials have demonstrated cardiac stem cells as a treatment option for cardiomyopathy.
Stem cell populations are rapidly increasing, and we are still in the search of optimal cell types to use in clinical trials as bone marrow stem cells did not show significant improvement in cardiac function following transplantation.
Several clinical trials using adult stem cell have shown improvements in cardiac function, however, the mechanism of their action is unclear and widespread tissue regeneration is not evident.
As we await results from larger and more prolonged clinical trials, the science of stem cell therapy in cardiac disease keeps progressing.
Stem cell therapy for treatment of cardiac disease has shown therapeutic potential.
It should be noted that stem cell therapy is not limited to the treatment of ischemic cardiac disease.
Over the past 2 decades, there have been numerous stem cell studies focused on cardiac diseases, ranging from proof-of-concept to phase 2 trials.
This series of papers focuses on the legacy of these studies and the outlook for future treatment of cardiac diseases with stem cell therapies.
Cell transplantation to repair or regenerate injured myocardium is a new frontier in the treatment of cardiovascular disease. 
Current therapies only delay progression of the cardiac disease or replace the diseased heart with cardiac transplantation. Stem cells represent a recently discovered novel approach to the treatment of cardiac failure that may facilitate the replacement of diseased cardiac tissue and subsequently lead to improved cardiac function and cardiac regeneration.
 Over the past 2 decades, there have been numerous stem cell studies focused on cardiac diseases, ranging from proof-of-concept to phase 2 trials. This series of papers focuses on the legacy of these studies and the outlook for future treatment of cardiac diseases with stem cell therapies.
Stem cell therapy for treatment of cardiac disease has shown therapeutic potential.
Over the past 2 decades, there have been numerous stem cell studies focused on cardiac diseases, ranging from proof-of-concept to phase 2 trials. This series of papers focuses on the legacy of these studies and the outlook for future treatment of cardiac diseases with stem cell therapies.
It should be noted that stem cell therapy is not limited to the treatment of ischemic cardiac disease. Non-ischemic cardiomyopathy, peripheral vascular disease, and aging may be treated by stem cells.
 Recent clinical trials have achieved favorable initial endpoints with improvements in cardiac function and clinical symptoms following cellular therapy.
we consider how cardiac stem cell biology has led us into clinical trials, and we suggest that achieving true cardiac regeneration in patients may ultimately require resolution of critical controversies in experimental cardiac regeneration.
Cell-based therapies and tissue engineering provide new promising platforms to develop upcoming therapeutic options. Initial clinical trials were able to generate promising results. A variety of different stem cell types have been used for the clinical application. 
 Insights gained from clinical trials of adult stem cells, together with fundamental scientific advances in cardiac stem cell and regenerative biology, are beginning to yield potential new targets and strategies for regenerative therapies. 
Early animal trials have demonstrated the ability to improve cardiac function by transfer of HSCs into the myocardium, and early human studies have demonstrated the feasibility and safety of this approach.

Answer: Yes, there exists clinical trials  for cardiac stem cell based treatment.
Yes, there are several clinical trials on the use of stem cells for the treatment of cardiac (heart) disease.
Exact answer: yes