Heart Health Archive

Research we're watching

Got a high cholesterol reading? You may have a higher risk for a dangerous eye condition called glaucoma, according to a recent study published online May 2 by JAMA Ophthalmology. The condition, characterized by pressure in the eye that can damage the optic nerve, can lead to vision loss.

The study looked at 866 cases of primary open-angle glaucoma, the most common type of glaucoma, among more than 136,000 study participants who were followed for 15 or more years. Participants provided researchers with updates on statin use and cholesterol levels every other year throughout the study period. After analyzing the information, study authors found that for every 20-point increase in total cholesterol there was a 7% increase in glaucoma risk. But the use of cholesterol-lowering statin drugs seemed to reduce risk. People who used statins for five years or longer had a 21% lower risk of developing glaucoma.

Eating too much salt usually boosts blood pressure, but not in everyone. Understanding the genetic basis of these differences may improve treatment of high blood pressure.

Do you know someone who eats lots of salty food — pizza, pickles, pretzels, and the like — but has naturally low blood pressure? That person may be salt-resistant, which means his or her blood pressure doesn't rise very much in response to a diet high in salt (sodium chloride). In contrast, other people are salt-sensitive, which means their blood pressure rises by 5 points or more if they switch from a low-sodium to a high-sodium diet.

Unfortunately, there isn't an easy test to determine who is salt-sensitive, says endocrinologist Dr. Gordon Williams, professor of medicine at Harvard Medical School. "Still, we know that Americans eat far more salt than they actually need, so it makes sense to advise everyone cut back on salt," he says.

Apps that pair with devices that record data may help your doctor fine-tune your treatment.

Health-related smartphone apps are a dime a dozen, but some are more sophisticated than others. Of special interest for people with heart disease are apps that pair with devices that measure your blood pressure, your heart's electrical activity, or your weight. Data from these apps may help doctors make faster and better informed treatment decisions for their patients, says Dr. Eric Isselbacher, who heads the Healthcare Transformation Lab at Harvard-affiliated Massachusetts -General Hospital.

App acceptability

Contrary to popular belief, the 65-plus crowd is comfortable using apps, says Dr. Isselbacher, who co-authored a recent study looking at the willingness of heart patients to use apps and related technologies. Compared with millennials, older people have been slower to adopt and adjust to smartphone apps. But now that they're using them for ride-hailing services and the like, they recognize that apps are actually pretty simple to use.

Their efficacy as a tool for quitting regular cigarettes and their long-term safety remain concerning.

Even if you never touch cigarettes, you probably know someone who does (or did) smoke. Nearly half of Americans smoked in the mid-1960s, compared with just 14% today. Still, cigarette smoking is responsible for nearly one in five deaths in the United States, and about one-third of those are due to heart disease.

What about electronic cigarettes (e-cigarettes), the latest smoking trend? These battery-operated devices heat up a liquid, creating a vapor that users inhale and exhale, a practice known as "vaping." Although e-cigarettes were initially targeted to young people, more recent ad campaigns feature middle-aged, long-time smokers who have switched to vaping. Is vaping safer than smoking, especially from a cardiovascular perspective? And can these products help people quit regular cigarettes?

These two common conditions have many overlapping risk factors, but they both respond to healthy lifestyle changes.

The biggest organ inside your body, your liver, lies just below and to the right of your heart. This powerhouse organ performs many vital roles in the body, including processing cholesterol and making proteins that help your blood clot. But as many as one in four Americans has a potentially dangerous accumulation of fat inside the liver. This condition, known as non-alcoholic fatty liver (NAFL), often goes hand in hand with obesity and diabetes. Both of those conditions boost the risk of heart disease, and growing evidence also links NAFL with cardiovascular problems.

"The connection between fatty liver and early signs of plaque in the coronary arteries is increasingly compelling," says Dr. Tracey Simon, a hepatologist at Harvard-affiliated Massachusetts General Hospital (MGH). Excess fat around the liver and other organs in the abdomen—known as abdominal obesity — is another likely related problem. In fact, abdominal obesity seems to accelerate the progression of fatty liver to a more serious form of the problem, nonalcoholic steatohepatitis, or NASH (see "The many faces of fatty liver disease").

The most commonly eaten type of bean in the United States, pinto beans are especially popular in southern states, where they may be known as frijoles (Spanish for "beans") or cowboy beans. These oval, tan-colored beans are mottled with reddish-brown streaks, making them appear painted (pinto means "painted" in Spanish).

Once they're cooked, the colored splotches disappear, leaving a light-brown bean with a soft, creamy texture. In Mexico, Central America, and South America, pintos are cooked with epazote, an herb that purportedly helps reduce the flatulence-producing properties of these and other beans. Another tip for avoiding that problem is to add beans to your diet gradually and eat them regularly.

Research we're watching

People who walk at a brisk clip may live longer than those who walk slowly — regardless of how much they weigh, a new study finds.

Researchers looked at data from nearly 475,000 adults in the United Kingdom Biobank study, which recruited middle-aged participants from 2006 to 2010. The participants, most of whom were slightly overweight, were asked to describe their usual walking pace as slow, average, or brisk.

Research we're watching

A plant-focused diet long touted for its ability to lower blood pressure may also help prevent heart failure, according to a new study.

The DASH diet, which stands for Dietary Approaches to Stop Hypertension, emphasizes fruits, vegetables, whole grains, low-fat dairy products, poultry, fish, and nuts while minimizing salt, sugar, and red meat consumption.

Research we're watching

Taking good care of your teeth — including twice-daily brushing and at least yearly professional cleanings — seems to be linked to better heart health, according to a study in the April 7 European Heart Journal.

The findings were based on data from nearly 248,000 healthy adults ages 40 and older who were part of a national health screening program in Korea. Researchers tracked study participants for a median of 9.5 years and noted higher rates of heart-related problems among individuals who had periodontal (gum) disease or who had lost teeth.

This noninvasive test can predict plaque in the heart's arteries. But it is useful only in certain situations.

Imagine a 57-year-old man (let's call him Bill) who's in pretty good health — a nonsmoker who eats right and exercises regularly. He takes two drugs to treat high blood pressure. Even though his LDL (bad) cholesterol isn't all that high, his primary care doctor suggests that Bill consider taking a statin to lower his risk of a heart attack.

Bill is a little hesitant to add another drug to his daily regimen, so his doctor tells him about a test that may help with the decision: a coronary artery calcium scan. This noninvasive test, which can reveal dangerous plaque in the heart's arteries, has been available for more than a decade. But calcium scans (as they're often called) are now recognized in official guidelines and are being used far more often than in the past, says Dr. Ron Blankstein, a cardiovascular imaging specialist and preventive cardiologist at Harvard-affiliated Brigham and Women's Hospital.