The original concept stated that dead cell can be reproduced. However, currently, there have been studies concerning stem cell that is ready to grow and divide itself. The scientists have been using stem cell in the application of the treatments for diseases such as Acute Myocardial Infarction, diabetes, leukemia, thalassaemia, Alzheimer, Parkinson and bone marrow paralysis to mitigate the symptoms and in some patient, complete cured

There are 2 types of Stem cell
1. Embryonic Stem cell, ethically, would not be used for treatment
2. Adult Stem cell, currently, is being used for treatment

There are 2 methods for treating Coronary Artery Disease with Stem cell
1. Injecting Stem cell through Intra-coronary injection
2. Injecting Stem cell through Surgical intra-myocardial injection .

Phyathai Hospital has selected Injecting Stem cell through Intra-coronary injection, which is the least painful method, for treating the patient because there is no surgery involved. It is done by only inserting a tube at the ankle or wrist for direct Stem cell injection into the heart artery. This method of treatment is appropriate for patient that has been treated with balloon or wire implantation one or twice or has been operated on once or twice but the result was not as good as it should be or there is no alternative or the heart is still large or the chest is still painful from lacking blood in the heart or tightness.

The patient who would like to be treated with adult Stem cell must have blood drawn from Brachial Artery 1 week prior to the treatment. The blood will then be sent to the laboratory for Stem cell separation and growth. The Stem cell will then be injected back into the patient through the heart artery to stimulate the construction of new artery and heart muscle, which are expected to revitalize the heart muscle and construct small arteries within 4 to 6 months after the injection. Concerning safety, since adult Stem cell belongs to the patient, there would not be any rejection and the risks are the same risks normally associate with Intra-coronary, balloon or wire implants such as loss of blood supplied to the heart, heart artery clog or paralysis, which hardly occurs.