Short-Term Exposure to Low and High Temperatures and Mortality Among Patients With Heart Failure in Sweden

What are the associations between short-term low and high ambient temperature exposures and mortality among patients with heart failure in Sweden?In this nationwide, time-stratified case-crossover study involving more than 250 000 patients with heart failure, short-term exposure to both low and high ambient temperatures was associated with increased risk of all-cause and cardiovascular mortality. The mortality risk associated with high temperatures intensified over time.Both low and high temperature exposures increased mortality risk among patients with heart failure, highlighting the need for adaptation measures even in high-latitude regions not traditionally considered heat vulnerable.

Corresponding Author: Wenli Ni, PhD, Center for Climate, Health, and the Global Environment, Department of Environmental Health, Harvard T. H. Chan School of Public Health, 665 Huntington Ave, Boston, MA 02115 (wni@hsph.harvard.edu).

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