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Research Letter
September 6, 2016

Cardiac and Thermal Strain of Elderly Adults Exposed to Extreme Heat and Humidity With and Without Electric Fan Use

Author Affiliations
  • 1Institute for Exercise and Environmental Medicine, University of Texas Southwestern Medical Center, Dallas
  • 2Faculty of Health Sciences, University of Sydney, Lidcombe, Australia
JAMA. 2016;316(9):989-991. doi:10.1001/jama.2016.10550

Heat-related morbidity and mortality are important health challenges posed by global climate change.1 Electric fans provide a low-cost and accessible cooling intervention, although their effectiveness remains debatable. Due to theoretical risks of accelerated heat gain and dehydration, fan use is discouraged above ambient temperatures of approximately 35°C.2 However, empirical data to support or refute their use during heat wave conditions are sparse.3

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