Colder Weather Poses Greater Heart Risk Than Heat, Study Finds
New research led by Mount Sinai reveals that colder temperatures are linked to significantly more heart-related deaths than warmer weather in the United States, challenging the common focus on heat as the primary weather-related cardiovascular risk.
Study Title: “Cardiovascular disease mortality attributable to monthly non-optimal temperature in the United States: a county-level analysis”
Presentation: American College of Cardiology Scientific Sessions – Young Investigators Award Competition Finalist: “Outcomes Research” (Monday, March 30, 9:30 am CDT in New Orleans)
Publication: Journal of the American Journal of Preventative Cardiology (simultaneous publication)
Key Findings
The study, analyzing data from over 14 million cardiovascular deaths across 819 U.S. Counties (representing 80% of the population) between 2000 and 2020, determined that the optimal temperature for heart health is 74 degrees Fahrenheit. Deviations from this temperature increase mortality risk, but colder temperatures pose a substantially greater threat.
- Approximately 40,000 cardiovascular deaths each year (6.3%) were attributable to temperatures below 74°F.
- Roughly 2,000 cardiovascular deaths each year (.33%) were linked to temperatures above 74°F.
- Over the two-decade study period, colder weather was associated with approximately 800,000 deaths, compared to 40,000 deaths due to warmer weather.
- One in 16 cardiovascular deaths were linked to colder weather, compared to one in 300 linked to heat.
Why This Matters
The research highlights a critical gap in public health messaging and awareness. While heat waves receive significant attention for their impact on cardiovascular health, this study demonstrates that colder temperatures are a more consistent and substantial risk factor.
What This Means for Clinicians and Patients
For Clinicians: Healthcare providers should recognize cold exposure as a meaningful cardiovascular risk factor, particularly for older adults and individuals with pre-existing heart conditions. Seasonal risk assessments and preventive counseling should incorporate this consideration.
For Heart Patients: Individuals with cardiovascular disease should take precautions during cold weather, including staying warm, avoiding strenuous activity like snow shoveling, and adhering to prescribed medications. Medication adjustments may be necessary during periods of extreme cold, in consultation with a healthcare provider.
Study Methodology
Researchers linked mortality data with local temperature data and employed statistical models to assess the association between temperature deviations and cardiovascular death risk. The analysis adjusted for the disproportionate number of observations occurring at temperatures below 74°F to ensure accurate results.
Expert Perspective
“This may be surprising to many, but most temperature-related cardiovascular deaths are associated with cold, not heat,” says Pedro Rafael Vieira De Olivera Salerno, MD, Internal Medicine Resident at the Icahn School of Medicine of Mount Sinai and NYC Health + Hospitals/Elmhurst. “As clinicians, we see seasonal patterns in cardiovascular events, but this helps quantify how much cold exposure contributes at the population level. This isn’t just about extreme weather. Even routine cold exposure, especially in vulnerable patients, can increase cardiovascular risk.”
About the Icahn School of Medicine at Mount Sinai
The Icahn School of Medicine at Mount Sinai is a globally recognized institution for research, education, and clinical care. It serves as the academic partner for the seven member hospitals of the Mount Sinai Health System, providing care to a diverse patient population in New York City. The school is ranked 11th nationwide in National Institutes of Health (NIH) funding and boasts over 4,500 scientists, educators, and clinicians. Learn more about Mount Sinai.
Media Contact: Ilana Nikravesh, Director of Public Affairs and Media, Mount Sinai Health System. [email protected], 347-852-3382.
The post Cold Weather Linked to 40,000+ Heart Deaths Yearly, Study Finds appeared first on Archynewsy.