New Issue: Science’s Impossible Questions. Read Now

Stem Cells Help Heal Broken Hearts

After a heart attack, cells from the patient's bone marrow can help improve heart function. Katherine Harmon reports

Join Our Community of Science Lovers!

Valentine's Day can lead to plenty of broken hearts. But for cardiac wounds that time alone won't heal, science has made some major advances. When it comes to heart attack, for example, a big development is emerging from a tiny source. Stem cells are coming of age. 

Stem cells, harvested from a patient's own bone marrow, have been heralded as a potential quick fix for damaged heart tissue. But can these progenitor cells actually work to heal massive muscle damage?

A new review of 33 studies assessed data from more than 1,700 heart attack patients. The review researchers found that those patients treated with stem cells—in addition to the standard care of angioplasty—had stronger tickers for years to come than those who had not gotten stem cell therapy. The review article is published in The Cochrane Library. [David Clifford et al., "Stem Cell Treatment Following a Heart Attack"]


On supporting science journalism

If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.


It's too early to say whether those with stem cell treatments will live longer, according to the new analysis. But for affairs of the heart, it's more evidence that good things can come in very small packages.

—Katherine Harmon

[The above text is a transcript of this podcast.]    

Subscribe to Support Independent Journalism

Great science journalism requires human expertise, time, effort and creativity. And it costs money. That’s why I and the journalists here at Scientific American hope you’ll join our community.

When you subscribe, you are supporting staff and freelance journalists who are passionate about telling science stories that are true, important and compelling. Our editors and reporters are often experts in their fields, which means they understand the nuances of big discoveries and can untangle the breakthroughs from the hype. With a subscription, you are also supporting rigorous fact-checking to ensure the words we publish are precise and accurate. And you’re supporting original illustrations, graphics and photos that bring you closer to an advanced laboratory, an ice sheet in Antarctica or a space mission in orbit. You’re helping us craft other types of high-quality journalism as well: Our newsletters are carefully written, edited and curated by staffers you have or will come to know and love. Our Science Quickly podcast is based on original reporting, collaboration with editors and scientists and exacting production.

Subscriptions keep this engine running so we can continue to deliver thoughtful, rigorous and independent science journalism to you. In an era of viral misinformation, this work is crucial. If you value what we do, I hope you’ll consider joining us as a subscriber

Thank you,

Jeanna Bryner, Editor in Chief, Scientific American

Subscribe