stem cell Treatment for heart failure & cardiovascular diseases does not require stent surgery to bypass the blockage. http://stemcellthailand.org/therapies/heart-disease-myocardial-ischemia-chd/

HEart Stem cells make the treatment much safer by using enriched cardiopoietic cells to provide an anti-inflammatory effects, reduce the size of the scar tissue and grow new blood vessels (angiogenesis.)
Heart Therapies with stem cells include:
• Acute Myocardial Infarction
• Ischemic Heart Cardiomyopathy
• Ischemic Insufficiency Cardiac
• Dilated Cardiomyopathy
• CAD - Coronary Artery Disease
• PAD (Peripheral Artery Disease)
• Angina
• Myocarditis
• Heart valve damage
• Stem Cell therapy for Heart Attacks

More here http://stemcellthailand.org/therapies/congestive-heart-failure-chf/