Heart Health Archive

Electrical cardioversion is a procedure that uses low-energy shocks to convert a rapid or irregular heartbeat back to a normal rhythm. People remain asleep during the brief procedure, so they don't feel anything.

Not getting sufficient sleep may harm the cardiovascular system by triggering physiological and hormonal changes that increase blood pressure, blood sugar, and blood levels of substances that indicate inflammation. People who don't regularly get at least seven hours of sleep a night should assess their daily habits to look for ways to improve, such as by establishing an earlier bedtime and turning off all electronic devices at least an hour before bedtime.

Fiber-rich diets may lower the risk of heart attack and stroke, in part by decreasing inflammation. This benefit appears to be facilitated by the breakdown of prebiotic fiber in the gut microbiome to create short-chain fatty acids. These compounds circulate through the bloodstream and interact with specific receptors on cells that quell inflammation. Short-chain fatty acids may also play a role in keeping blood sugar, blood pressure, and cholesterol levels in check, as well as helping to prevent harmful blood clotting.

Cardiac CT angiography (CCTA), a noninvasive test to check for clogged heart arteries, is now considered a first-line test for people with suspected heart disease. This test uses a CT scanner, which takes multiple, rapid x-rays that are merged together to create a detailed, three-dimensional view of the heart's arteries. CCTA appears to be just as effective as traditional angiography for detecting and preventing heart attacks, strokes, and death from heart disease, but with fewer procedure-related risks.

Sugar is a carbohydrate that provides the body with energy and has an important role in nutrition. It is found in many healthy whole foods, but it is also abundant in unhealthy processed foods. The problem many people have with sugar is that they consume too much of the refined kind added to many processed food products, and not enough of the natural kind in fruits, vegetables, and grains.

Fewer than half of people who experience cardiac arrest outside of a hospital receive CPR from someone nearby. Shorter, more accessible training and help from technology may encourage more people to learn and administer this lifesaving technique. Another potential barrier to performing CPR is not recognizing the symptoms of cardiac arrest. Common mistakes include pressing down on the stomach instead of the center of the chest, not compressing the chest deeply enough, or giving compressions that are either too fast or too slow.

A 2022 study found that people who have depression after a heart attack are nearly 50% more likely to suffer a stroke compared with heart attack survivors who don't develop depression.

Mammograms are still the gold standard method for breast screening, but additional imaging tests can help detect cancers that might otherwise be missed in women with dense breasts or other breast cancer risk factors. Ultrasound is inexpensive but has a high false-positive rate if used alone. MRI is expensive but very accurate for tumor detection. Three-dimensional mammograms are highly accurate but have a 50% false-positive rate over a decade of yearly screening in women ages 40 to 79.

About one in 11 men ages 65 and older has atrial fibrillation (afib), a heart rhythm disorder that causes an irregular and often faster-than-normal heartbeat. Afib can be persistent and chronic, or it can happen intermittently. People might have no symptoms with either variety, or afib can cause lightheadedness, shortness of breath, chest pain, or extreme fatigue. But the biggest worry is a fivefold increased risk of stroke. The main treatment choices for people are rate control with medication, or rhythm control, done with medication or a procedure such as electrical cardioversion or catheter ablation.

Some studies have found that drinking any amount of alcohol is unhealthy. But more than 100 large studies have found that people who have one drink per day have lower risks of cardiovascular disease. How can both be true? It depends on a person's current state of health, lifestyle habits (such as diet, exercise, and smoking), family history of disease, and the quantity of alcohol consumed. People who don't usually drink have no need to start: there are better ways to achieve a healthy heart.