You might think your risk for heart disease is low based on standard calculators that use factors like age and cholesterol. But a new analysis of nearly 20,000 people suggests a routine heart test could reveal hidden clues. The study found that people whose electrocardiogram (ECG) showed a 'major' abnormality were more likely to have a future heart attack or stroke over many years of follow-up, even among those whose calculated 10-year risk was under 7.5%.
The researchers looked at data from adults with no known heart disease at the start. They compared those with normal ECGs to those with minor or major abnormalities. After accounting for other risk factors, having a major abnormality was linked to a 53% higher risk of a heart event. The link was strongest for major abnormalities, while minor ones showed a weaker, less clear connection.
It's important to remember this was an observational study. That means it can show a link, but it can't prove that the ECG abnormality directly caused the heart events. The study also didn't test whether acting on this information—like starting a medication—would actually prevent problems. The findings suggest that an ECG might give doctors an extra piece of the puzzle for some patients, but more research is needed to know exactly how to use it.