About My Health Careers Internship MedBlogs Contact us
Medindia LOGIN REGISTER
Advertisement

Mending Broken Heart With Live Tissue Will Become a Reality Soon

by VR Sreeraman on September 3, 2007 at 3:55 PM
Font : A-A+

Mending Broken Heart With Live Tissue Will Become a Reality Soon

Surgeons will soon be able to literally mend a broken heart using live tissue grown from a patient's very own stem cells, top cardiologists said Monday.

The whole procedure -- harvesting cells from bone marrow, growing tissue, and surgically implanting the heart muscle or valve -- could take as little as six weeks and could become routine within three-to-five years, they reported.

Advertisement

Their findings were published in a special issue of the Philosophical Transactions of The Royal Society B in Britain.

One reason heart attacks are so debilitating, even when they are not fatal, is because the human heart -- a massive muscle surrounding four valves controlling the body's blood flow -- does not regenerate. Damaged tissue stays damaged.
Advertisement

Most problems occur with age, when the old ticker simply begins to wear out.

"But the highest medical need for tissue-engineered heart valves is in the treatment of congenital heart malformation," which affects nearly one percent of all newborns, Simon Hoeurstrup, lead author of one of the studies, told AFP.

Artificial heart valves currently available must be periodically replaced as children grow, leading to great suffering and higher death rates than in adults.

Bio-engineered heart muscle that could be grafted onto a patient's living tissue without fear of rejection by the immune system has long been a holy grail of cardiovascular medicine.

Artificial replacements "do the job and save people's lives," said celebrated heart surgeon Magdi Yacoub, who coordinated the 20-odd studies.

"But they cannot match the elegant, sophisticated functions of living tissues."

While durable, mechanical hardware increases the risk of bacterial infection in the heart's inner lining, as well as abnormalities in blood flow. Recipients must also take medication to prevent blood clots, boosting the chances of internal bleeding and embolisms.

Cardiovascular disease, the number one killer worldwide, claimed some 17.5 million lives in 2005, according to the World Health Organisation. Many of these deaths might have been avoided by timely surgery to implant replacement valves and heart muscle.

There are currently two broad techniques for making bio-prosthetic heart valves, and both have serious drawbacks.

Animal grafts, especially from pigs, are readily available, but differ in structure and tend to wear out. Human valves from donors work much better, but are in chronically short supply and can easily provoke immune reactions.

In the tissue engineering approach favored by Yacoub and Hoerstrup, the patient's own stem cells -- taken from bone marrow -- are isolated and expanded in the laboratory using standard cell culture techniques.

They are then "seeded" onto a special matrix in the shape of a heart valve that is positioned in a device called a "bioreactor" that tricks the cells into growing in the right shape.

Once mature, the living-tissue heart valves can be implanted in the patient. The whole process unfolds in a matter of weeks.

This procedure has already been extensively tested in sheep, but several years of follow up are required before it can be deemed effective and safe, said Hoerstrup.

Another hurdle, he said, is that the capacity of some patients to yield suitable stem cells may be compromised by diseases such as diabetes.

Source: AFP
LIN/J
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Advertisement
News Category
What's New on Medindia
Memory Loss - Can it be Recovered?
International Day of Persons with Disabilities 2021 - Fighting for Rights in the Post-COVID Era
Effect of Blood Group Type on COVID-19 Risk and Severity
View all

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.

More News on:
Heart Healthy Heart Statins Mitral Valve Prolapse Aortic Valve Stenosis Pericarditis 

Recommended Reading
Heart Attack
Heart attack is the death of the heart muscle due to loss of blood supply. Heart disease is the ......
Stem Cells may Repair the Damage Caused by Heart Attacks
A new study is employing stem cells to repair heart attack damages. The study is being conducted by ...
Aortic Valve Stenosis
Aortic valve Stenosis is an abnormal narrowing of the c valve. Symptoms include angina, and that of ...
Mitral Valve Prolapse
Mitral Valve Prolapse is a relatively common condition and causes leakage of blood through the valve...
Pericarditis
Pericarditis occurs when the pericardium gets inflamed. Pericarditis is characterized by severe ches...
Statins
Statins are new wonder drugs that are proving to be efficacious, not merely in relieving symptoms bu...

Disclaimer - All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment. Full Disclaimer

© All Rights Reserved 1997 - 2021

This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use