Heart Health Archive

Ejection fraction is the fraction (expressed as a percentage) of the blood that the heart "ejects" out to the rest of the body when it contracts. Low ejection fraction signals one form of heart failure. An echocardiogram is the standard test to measure ejection fraction.

Isometric exercises that engage the muscles without movement—such as wall squats and planks—may help lower blood pressure more than other types of strength training. Experts have speculated about a possible mechanism: During isometric exercise, clenched muscles temporarily constrain blood flow. The following surge of blood may stimulate the release of factors that help relax the vessels and ultimately contribute to a reduction in blood pressure.

Thousands of miles of veins throughout the body bring blood to the lungs to pick up oxygen and nutrients, and get rid of carbon dioxide before returning to the heart to be pumped out again. How do veins work, what problems can occur, and how can you keep these vital blood vessels healthy?

A heart-healthy dietary pattern emphasizes minimally processed vegetables, fruits, whole grains, and beans. Learn how you can adopt a heart-healthy eating style to boost your cardiovascular health.

Following a plant-based eating pattern and cutting back on highly processed foods can help promote a more diverse, healthier microbiome. A healthy gut microbiome may decrease inflammation that promotes heart disease. Most fruits, vegetables, beans, and whole grains are good sources of prebiotic fiber, which is broken down by gut bacteria to create short-chain fatty acids. These fatty acids are linked to lower inflammation and reductions in other heart disease risk factors.

People who get most of their recommended weekly physical activity over one or two days may lower their heart disease risk just as much as those who are active more regularly throughout the week. Evidence also suggests there's no particular benefit to exercising at certain times of the day, including with respect to mealtimes. So people should be physically active whenever they find it to be most convenient.

Too much saturated fat tends to raise levels of harmful LDL cholesterol, but limited amounts are not a problem. Eating mostly whole or minimally processed foods can help achieve that goal.

A 2023 study found that the more steps people take, the lower their risk of dying from cardiovascular disease, with the benefits starting with as few as 2,300 steps per day.

Even slightly elevated blood sugar levels—a condition known as pre-diabetes—may raise the risk of cardiovascular problems. But attention to weight loss and greater use of medications to lower blood pressure and cholesterol appear to reduce the risk.