Atrial fibrillation (AFib) is a common heart condition affecting about 3 million people in the United States. However, researchers from the University of California – San Francisco discovered that AFib may be three times more common in the U.S. than previously thought. They analyzed data from almost 30 million adult patients in California from 2005 to 2019 and found that about 2 million of them received an AFib diagnosis, with the numbers increasing over time from 4.49% to 6.82% of participants treated. After standardizing the data nationwide, researchers estimated that the current AFib prevalence in the U.S. is at least 10.55 million, or about 5% of the population.
Previous studies have reported an increase in AFib cases, with one review stating that about one in every three to five people over the age of 45 is at risk. While AFib is typically considered a condition for older adults over 60, studies have shown an increase in AFib occurring in younger individuals. Researchers found that people with AFib were younger, less likely to be female, and more likely to have high blood pressure and diabetes. The rise in common risk factors such as hypertension, obesity, or diabetes might partly explain the increasing prevalence of AFib.
Increased healthcare utilization among females or patients with comorbidities such as hypertension and diabetes might contribute to the higher likelihood of diagnosing AFib during healthcare encounters. The most important driver for AFib is population aging, as increasing age is the strongest risk factor for the condition. Enhanced AFib detection and improved survival of affected patients also contribute to the increasing number of cases. The rise in common risk factors for AFib highlights the need for early detection and appropriate treatment to prevent complications.
Nikhil Warrier, MD, a cardiac electrophysiologist, commended the study for demonstrating increased diagnosis of AFib in younger patients with significant comorbidities. Improved accuracy from wearable devices may lead to earlier diagnosis and increased volume of patients seeking care. Successful programs addressing risk factors can lead to improved clinical outcomes for all patients. Yuriy Dudiy, MD, a surgical director, emphasized the significance of the study, highlighting the need for policymakers, the medical community, and the public to address AFib as a major public health concern. Strategies focusing on prevention, early detection, and effective management are crucial to ensuring a healthier future and reducing the burden on the healthcare system.
