Heart failure & cardiomyopathies
Short-Term Effects of Ambient Temperature on Acute Heart Failure Decompensation: Phenotype-Specific Risk in a Time-Stratified Case-Crossover Study
Main finding · Risk of ADHFResult — go to the resultEstimate 1.80 95% CI 1.40–2.31Authors' conclusion
Low ambient temperature increased ADHF risk, especially in older adults, while temperature effects differed by hemodynamic phenotype. Incorporating temperature exposure into risk assessment may enable targeted prevention of climate-related decompensation.
Study context
- Population
- Patients with Acute Decompensated Heart Failure (ADHF) registered in the Tokyo Cardiovascular Care Unit Network Database between January 2014 and December 2019patients with ADHF
- Participants
- 26,874 patients
- Comparison
- association between ambient temperature and ADHF admissions over lag days 0 to 5
Main finding
Risk of ADHF · lag days 0 to 5
Estimate
1.80
95% CI 1.40–2.31
As reported in the abstract
Further findings
Subgroups by age
- This risk was larger in patients aged ≥70 years and otherwise consistent across subgroups
ADHF by hemodynamic profile
- ADHF with low blood pressure: odds ratio at the 99th percentile, risk increasing at high temperatures
- 6.25 [95% CI, 1.07-36.6]
- Risk for ADHF with hypertension rose at low temperatures
Original publication
Short-Term Effects of Ambient Temperature on Acute Heart Failure Decompensation: Phenotype-Specific Risk in a Time-Stratified Case-Crossover Study. Circ Heart Fail. Published 28 May 2026. doi:10.
Summarised from the published abstract; every number is checked against it