Heart Health Archive

Circadian rhythms, which are hardwired into nearly every cell of the body, regulate the heart and blood vessels. Disruptions to this rhythm-from shift work, poor sleep, or unhealthy habits-can raise the risk of cardiovascular disease. For example, heart attacks are more likely to occur on Mondays than any other day of the week. That's because people tend to stay up later than usual and then sleep in the next day. On Monday morning, when they have to wake up early again for work, the change may cause subtle changes in blood pressure, hormone secretion, and metabolism that raise heart attack risk.

Heart rate variability (HRV) is a measure of the tiny fluctuations in timing from one heartbeat to the next. Higher values are linked to better fitness levels and stress resilience.

Eating two eggs per day doesn't appear to raise harmful LDL cholesterol, as long as people follow a diet low in saturated fat. Although eggs are high in cholesterol, dietary cholesterol doesn't have much of an effect on the amount in a person's bloodstream. But excess dietary saturated fat does raise blood cholesterol, which is why people should limit their saturated fat to 7% of their daily calories.

A free online tool that estimates your heart's age suggests that most adults have a heart that is older than their chronological age, according to a 2025 study.

A diet high in ultra-processed foods is linked to higher burden of fatty plaque in the carotid arteries, according to a 2025 study.

A 2025 study suggests that higher fitness levels may help protect people from developing atrial fibrillation.

A 2025 study suggests that postmenopausal women may be able to lower their blood pressure simply by standing more often each day.

Imaging tests such as chest CT scans and mammograms, which can detect calcium deposits in arteries, can provide information about a person's cardiovascular health. These so-called incidental findings-when a medical test discovers something unrelated to the original purpose of the test-have become increasingly common in recent years. With a chest CT, calcifications are grouped into four categories: none, mild, moderate, or severe. That's often enough for a cardiologist to make a solid decision about whether to maintain or intensify a person's drug treatment to prevent heart disease progression.

Obesity is a common, chronic disease that can harm the heart. The powerful weight-loss medications known as GLP-1s, semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound), are now recommended as first-line therapy for eligible people, according to the American College of Cardiology. People using these drugs should work with a dietitian or nutritionist who can help them create a personalized eating plan that ensures they're getting enough nutrients while minimizing common side effects.

A 2025 review found the people who walked 7,000 steps per day had a 25% lower of cardiovascular disease and a 47% lower risk of death from all causes compared to people who walked only 2,000 steps per day.