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I?ve read that a normal resting heart rate is between 60 and 100 beats per minute. Mine runs around 45 to 48. Should I be concerned? I have been a runner for 42 years and have completed seven marathons.

Lightheadedness is a feeling of wooziness or faintness. It is commonly caused by dehydration, drug side effects, blood pressure drops, low blood sugar, heart disease, or stroke.

A second opinion from a cardiologist may be helpful for people considering whether to undergo a specialized heart procedure. Such consultations may be increasingly appropriate as new, minimally invasive treatments for various heart problems become more widely available and more specialized. Others who might seek a second opinion include people with heart-related symptoms that persist despite treatment, who have been told they have no more options.

Telemedicine visits combined with self-measured blood pressure readings may help control high blood pressure better than traditional clinic visits, according to a 2024 study.

For improving cardiovascular risk, a workout that combines heart-pumping aerobic exercise and strength-based moves may be just as effective as an all-aerobic regimen, according to a 2024 study.

Every year, an estimated 600,000 people in the United States develop a blood clot deep inside the leg, known as deep-vein thrombosis. These clots usually develop in the lower leg, thigh, or pelvis but occasionally the arm. The affected area may be tender or painful, swollen, red or discolored, and warm to the touch. If a clot breaks free and travels to a lung, it can cause a pulmonary embolism. Symptoms of a pulmonary embolism include difficulty breathing that happens suddenly, a fast or irregular heartbeat, coughing up blood, and chest pain or discomfort, which usually worsens with a deep breath or coughing.

New guidelines for managing atrial fibrillation focus on lifestyle habits to prevent and control the disorder. One recommendation is for people to limit alcohol to one drink per day, or ideally less. Another is for people who are overweight or obese to lose weight, either by striving for a body mass index no greater than 27 or by shedding at least 10% of their body weight. The guidelines also suggest that people get three to four hours of exercise per week. And people with afib who snore should consider getting tested for sleep apnea.

Whole or minimally processed foods tend to be best for heart health. But many processed foods—and even some that are ultra-processed—are also good options, provided people choose wisely. In three large studies, ultra-processed whole-grain bread, breakfast cereals, and yogurt were linked to a lower risk of type 2 diabetes and cardiovascular disease. Artificially and sugar-sweetened beverages, processed meats, and ready-to-eat dishes were linked to higher risks of those conditions.

A calcium score is a good indicator of how much plaque is inside the heart's arteries. Treatments can replace cholesterol in plaque with scar tissue, which contains calcium and produces a higher calcium score, but this stabilized plaque lowers heart attack risk.

Resistance training (also called strength training or weight training) can improve heart-related risk factors such as blood pressure, blood sugar, blood lipids, and body composition. It's especially beneficial for older adults and people with an elevated risk for heart problems. A 2024 scientific statement from the American Heart Association recommends focusing on eight to 10 different exercises that target all the body's major muscle groups. Examples include chest presses, biceps curls, squats, and abdominal crunches.