Heart Attack Archive

Long touted as beneficial for heart health, high-density lipoprotein (HDL) is more complicated than experts once thought. Some forms of HDL grab cholesterol from the bloodstream and other tissues and transport it to the liver, where it's recycled or disposed, but other types are neutral or perform the opposite action. Most drugs that raise HDL don't seem to prevent heart disease, and very high HDL levels may even be linked to a higher risk.

Too much or too little potassium can harm the heart. Diet, medications, and kidney function can affect the body's potassium level. Dietary potassium helps keep blood pressure in a normal range, but most Americans don't consume enough of this mineral. However, people taking medications that raise potassium levels—which includes certain drugs to treat high blood pressure and heart failure—should avoid salt substitutes made with potassium chloride.

Recent guidelines suggest a blood pressure reading of less than 120/80 mm Hg as normal. But the ideal number for individuals depends on their individual goals and whether they also have a chronic condition, such as heart disease or kidney disease.

For people with heart disease, a Mediterranean diet prevents future heart problems better than a low-fat diet.

Seven factors appear to account for most first heart attacks in people ages 55 and younger: diabetes, depression, high blood pressure, current smoking, family history of early heart attack, low household income, and high cholesterol.

A randomized trial published May 14, 2022, in The Lancet found that people with heart disease who ate a Mediterranean diet for seven years had a 26% lower risk of having a heart attack or stroke, compared with people who ate a low-fat diet.

Grief, fear, conflict, or other negative emotions can lead to an unusual type of heart attack, commonly known as broken heart syndrome. Rarely, positive emotions can also trigger the problem—and this "happy heart syndrome" may be more prevalent among men.

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.

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.

Acute coronary syndrome (ACS) refers to a spectrum of conditions defined by a sudden reduction in blood flow to the heart. Most often, the underlying cause is a gradual buildup of fatty deposits called plaque inside the arteries supplying the heart. ACS includes two distinct types of heart attacks, known as STEMI and NSTEMI, and a serious condition called unstable angina that's often a prelude to a heart attack. All warrant immediate medical attention.