advertisement
Updated 14 February 2019

Climate change could bring more infant heart defects

A new study highlights the need for improved preparedness to deal with the anticipated rise in the number of babies born with congenital heart defects in the USA.

Climate change could lead to more US babies born with congenital heart defects, researchers say.

Specifically, they concluded that hotter temperatures may lead to as many as 7 000 additional cases between 2025 and 2035 in eight representative states: Arkansas, Texas, California, Iowa, North Carolina, Georgia, New York and Utah.

Lifelong care and follow-up

The Midwest, Northeast and South are forecast to experience the greatest percentage increases, according to the study published in the Journal of the American Heart Association.

"Our findings underscore the alarming impact of climate change on human health and highlight the need for improved preparedness to deal the anticipated rise in a complex condition that often requires lifelong care and follow-up," study senior author Dr Shao Lin said in a journal news release. Lin is a professor of public health at the University of Albany in New York.

She said it is important for clinicians to counsel women who are pregnant or planning to become pregnant on the importance of avoiding extreme heat – especially three to eight weeks after conception, a critical time for foetal development.

While previous research linked heat exposure among pregnant women to heart defects in their newborns, the causes remain unclear. Animal studies suggest heat exposure may cause foetal cell death or interfere with some heat-sensitive proteins that are critical in foetal development, the study authors said.

An important consequence of rising temperatures

For the new study, researchers used climate change forecasts from NASA and the Goddard Institute for Space Studies and data on how heat exposure during pregnancy affected the risk of congenital heart defects among babies born between 1997 and 2007.

Congenital heart problems are the most common birth defect in the United States, occurring in about 40 000 newborns each year, according to the US Centers for Disease Control and Prevention.

"Our results highlight the dramatic ways in which climate change can affect human health and suggest that paediatric heart disease stemming from structural heart malformations may become an important consequence of rising temperatures," said lead author Dr Wangjian Zhang. Zhang is a postdoctoral research fellow at the University of Albany.

Image credit: iStock

 
NEXT ON HEALTH24X
advertisement

Live healthier

Lifestyle »

E-cigarettes: Here are five things to know

E-cigarettes have become hugely popular in the past decade, but a rash of vaping-linked deaths and illnesses in the US is feeding caution about a product that's already banned in some places.

Allergy »

Ditch the itch: Researchers find new drug to fight hives

A new drug works by targeting an immune system antibody called immunoglobulin E, which is responsible for the allergic reaction that causes hives.

advertisement