00:00A hidden genetic risk may cause an irregular heartbeat decades earlier than expected.
00:04A new Penn State-led study is shedding light on early-onset atrial fibrillation, or AFib.
00:10Researchers found that at least 10.55 million American adults have AFib.
00:15That's roughly one in every 22 adults.
00:18The condition can cause the heart's upper chambers to beat irregularly.
00:22This can allow blood clots to form and increase stroke risk.
00:25Researchers studied more than 500,000 people in the UK Biobank.
00:30They found that people with a high burden of common genetic variants
00:33had about twice the risk of early-onset AFib.
00:36The study also examined rare mutations in the LMNA gene.
00:40Researchers say these rare mutations can interact with common genetic differences.
00:45Together, they may disrupt the heart's electrical system much earlier in life.
00:49The findings are not yet ready to guide routine treatment.
00:52But researchers hope genetic screening could eventually identify high-risk patients earlier.
00:56That could allow closer monitoring and help prevent serious complications.
01:01Disclosure.
01:02This video contains stock footage and content created or enhanced using AI-assisted tools.