Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2024 Nov 7;391(18):1754-1756.
doi: 10.1056/NEJMc2407812.

Simple Strategies to Reduce Cardiac Strain in Older Adults in Extreme Heat

Georgia K Chaseling  1 , Nicole T Vargas  2 , Lily Hospers  2 , Hadiatou Barry  1 , Amy Harwood  2 , Connor Graham  2 , Audrey-Ann Bartlett  1 , Amélie Debray  1 , Grant Lynch  2 , Anthony Capon  3 , Craig G Crandall  4 , Maria Fiatarone Singh  2 , Yorgi Mavros  2 , Peng Bi  5 , Anil Nigam  1 , Malorie Chabot-Blanchet  6 , Daniel Gagnon  7 , Ollie Jay  8
Affiliations

Simple Strategies to Reduce Cardiac Strain in Older Adults in Extreme Heat

Georgia K Chaseling et al. N Engl J Med. .
No abstract available

PubMed Disclaimer

Figures

Figure 1.
Figure 1.. Effect of Cooling Strategies on Heat-Related Cardiac Strain.
Shown are changes from baseline in the rate–pressure product (RPP) with no cooling (control), fan use, skin wetting, and fan use plus skin wetting after exposure for 3 hours to a hot and humid environment (Panel A) or a very hot and dry environment (Panel B) in participants with coronary artery disease (CAD) and those without coronary artery disease. The RPP is calculated as the heart rate in beats per minute (bpm) multiplied by the systolic blood pressure in millimeters of mercury. The hot and humid environment had a temperature of 38.0°C and a relative humidity of 60%. The very hot and dry environment had a temperature of 45.0°C and a relative humidity of 15%. Also shown are mean differences from control in the change from baseline in the RPP with each cooling strategy during exposure for 3 hours to the hot and humid environment (Panel C) or the very hot and dry environment (Panel D) in the overall trial population. Panels in the bottom row show mean differences from control in the change from baseline in the RPP with each cooling strategy during exposure for 3 hours to the hot and humid environment (Panel E) or the very hot and dry environment (Panel F) among participants with coronary artery disease and those without coronary artery disease. The change from baseline in the RPP during exposure to the very hot and dry environment was not assessed for cooling strategies involving fan use in adults with coronary artery disease, owing to safety concerns. I bars indicate 95% confidence intervals (Panels A, B, and D through F) or 98.33% confidence intervals (Panel C). The 95% confidence intervals were not adjusted for multiplicity and should not be used in place of hypothesis testing.
See this image and copyright information in PMC

References

    1. Liu J, Varghese BM, Hansen A, et al. Heat exposure and cardiovascular health outcomes: a systematic review and meta-analysis. Lancet Planet Health 2022;6(6):e484–e495. - PubMed
    1. Barry H, Iglesies-Grau J, Chaseling GK, et al. The effect of heat exposure on myocardial blood flow and cardiovascular function. Ann Intern Med 2024;177:901–10. - PubMed
    1. Ebi KL, Capon A, Berry P, et al. Hot weather and heat extremes: health risks. Lancet 2021;398:698–708. - PubMed
    1. Jay O, Capon A, Berry P, et al. Reducing the health effects of hot weather and heat extremes: from personal cooling strategies to green cities. Lancet 2021;398:709–24. - PubMed
    1. Centers for Disease Control and Prevention. About heat and your health: stay cool June 25, 2024. (https://www.cdc.gov/heat-health/about/index.html).

LinkOut - more resources