Major Study Finds 4 Risk Factors Behind 99% of Heart Attacks and Strokes
A massive study reveals that nearly all cardiovascular events are preceded by at least one key risk factor.
High Blood Pressure Was the Biggest Signal
High Cholesterol Was One of the Four Main Drivers
High Blood Sugar Also Played a Major Role
Tobacco Use Completed the Risk Group
The 99% Figure Needs Careful Reading
Most People Had More Than One Risk Factor
The Pattern Held in Younger Women Too
Stricter Medical Thresholds Still Showed Risk
The Study Was Large Because of Repeated Records
The Main Message Is Prevention
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Heart attacks and strokes often feel sudden when they happen, but a major international study suggests the warning signs usually appear years earlier. The finding does not mean every event is easy to predict, but it strongly challenges the idea that most serious cardiovascular crises arrive without measurable risk.
The study, led by Northwestern Medicine and Yonsei University in South Korea and published in The Journal of the American College of Cardiology, analysed health records from more than 9.3 million South Korean adults and nearly 7,000 U.S. adults. It found that more than 99% of people who later had coronary heart disease, heart failure or stroke had at least one of four major risk factors beforehand.