Extreme heat linked to higher risk of irregular heartbeat in defibrillator patients

New research indicates that extreme heat can significantly increase the risk of irregular heart rhythms, specifically atrial fibrillation (AFib), in individuals with implanted defibrillators. Temperatures above 100 degrees Fahrenheit nearly tripled AFib episodes among study participants. The study analyzed data from over 2,300 adults with defibrillators, finding that higher temperatures correlated with increased AFib occurrences. For instance, at 102.2 degrees, the risk of AFib was 2.66 times higher compared to cooler temperatures. These findings will be presented at the American Heart Association's Scientific Sessions on November 18. The research highlights the need for further investigation into how heat affects heart health, especially as AFib cases rise globally.