(Jan-Otto/E+, Getty Images) With each beat of your heart, the muscle squeezes, feeding blood to the rest of your body. The squeeze is triggered by an electrical impulse. Sometimes, though, a glitch slows that impulse. This can cause lightheadedness, low energy and shortness of breath. New York Yankees manager Aaron Boone felt those symptoms. Doctors…

(MattGush/iStock, Getty Images) Long-term exposure to air pollution, even at low levels, can increase the risk for heart and lung disease in older adults, new research shows. The study, published Monday in the American Heart Association journal Circulation, found exposure to three types of air pollutants was responsible for thousands of hospitalizations in the U.S….

Melissa Jeng is a congenital heart defect survivor, and she said the resilience she’s gained from it helps her live life to the fullest. (Photo courtesy of Melissa Jeng) Melissa Jeng had her first surgery when she was 3 days old – and the first of four open-heart surgeries at 8. Since then, she’s also…

(eggeeggjiew/iStock, Getty Images) People who reverse their prediabetes may lower the risk of heart attack, stroke and death, a new study suggests. With prediabetes, a person has blood sugar levels that are higher than normal but lower than the threshold for a diabetes diagnosis. Even so, people with prediabetes are more likely to have a…

Computer artwork showing the valves of the heart. (SCIEPRO/Science Photo Library, Getty Images) People with heart valve disease have a growing number of treatment options that could allow them to avoid surgery except in the most severe cases, according to new guidelines. The recommendations, meant to advise health care providers and developed jointly by the…

(Oliver Rossi/Stone, Getty Images) Heart disease and depression are interwoven, and a new study is helping unravel that connection by linking depression with poorer scores on seven important measures of heart health. The research included more than 4,000 people taking part in a national survey who had been screened for depression using a basic questionnaire….

(zoranm/E+, Getty Images) Lea en español For people who have heart disease, getting a flu shot greatly reduces the risk of dying or developing serious heart-related complications, a new analysis shows. The meta-analysis of 16 randomized and observational studies covered the experiences of more than 237,000 people. It concluded those with heart disease who were…

(DanielBendjy/E+, Getty Images) Asian immigrants in the United States are a widely diverse group with heart health risk factors that vary depending on where they are from, new research shows. It’s the first study to divide Asian Americans into subgroups to see how their risk factors for heart disease differ from their U.S.-born white peers….

(Malven/iStock, Getty Images) The risk of heart attack is significantly higher in people with PTSD or traumatic brain injury, a new study of U.S. veterans shows. Past studies have found post-traumatic stress disorder is a risk factor for heart disease and stroke. Veterans have disproportionately high rates for PTSD as well as traumatic brain injury,…

(Elizabeth Castaneda/EyeEm, Getty Images) Fighting fires comes with many risks. But new research shows there’s a new one to consider: increased exposure to fires appears to raise the likelihood of developing atrial fibrillation, or AFib, an irregular heartbeat that can lead to blood clots, stroke, heart failure and other problems. Researchers found the more fires…