Heart Disease Still the Leading Killer in the U.S.

Despite medical advances, heart disease remains the top cause of death in the U.S., claiming a life every 33 seconds. Older adults are especially at risk — nearly 25% of people aged 75+ have heart disease, compared to 14% of those 65–74 and 9% of those 55–64.

Heart disease isn’t inevitable with age, though. Many risk factors can be managed, and lifestyle changes at any age can help. Major risks include high cholesterol, high blood pressure, diabetes, inactivity, obesity, poor diet, alcohol use, and smoking. Genetics also play a role, accounting for about 50% of the risk.

The disease can lead to serious complications like heart attacks, arrhythmias, heart failure, and even organ damage. Symptoms aren't always obvious and can include shortness of breath, fatigue, or discomfort in the arms, jaw, or back — which is why it's often called a “silent killer.”

Prevention starts with simple steps: the CDC recommends 150 minutes of moderate weekly exercise, plus strength training twice a week. Even activities like walking or gardening can make a difference. The sooner heart-healthy habits start, the better — but it’s never too late to take action.