Heart Health Archive

People who bike to work or cycle for pleasure may have a slightly lower risk of heart disease compared with noncyclists. 

A new study found that a minimally invasive stent procedure is just as effective as bypass surgery for people with left main coronary artery disease. Stenting also had a lower risk of complications and death compared with the surgery.

A large international study of people around the world suggests that extreme physical exertion or emotional upset may be triggers for a heart attack. 

Dairy products don't seem to harm the heart. But plant-based fats are probably a better choice than cheese.

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Health-conscious consumers know to steer clear of diets that include lots of meat—especially fatty, salty processed meat. But what's the deal with dairy? Nutrition experts have long recommended low-fat milk and yogurt as good choices for getting the two to three daily servings of dairy recommended by federal dietary guidelines.

Over the past few decades, Americans have been spooning up more yogurt and drinking much less milk. But the biggest change by far has been in our cheese consumption, which has skyrocketed since the 1970s (see "Trends in dairy intake: Less milk, more cheese and yogurt").

Lacunar strokes, which account for about one-fifth of all strokes, occur in small arteries deep within the brain. Although these strokes may not cause symptoms, those that do may cause weakness in the face, arm, or leg on one side of the body. 

Certain cholesterol-lowering medications—namely, ezetimibe (Zetia) and drugs known as bile acid binders—also appear to be effective at lowering cholesterol and reducing the risk of serious cardiovascular events. 

A few simple precautions can minimize your risk.

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Every time you venture out into the bone-shivering, teeth-chattering cold of a Northern winter, your heart and blood vessels kick into overdrive to keep your internal organs cozy. To accomplish this feat, the tiny blood vessels in outlying areas such as the fingers and toes constrict to stem the loss of body heat into the environment. The flip side of this protective maneuver is that the heart must beat against extra force to overcome the resistance it meets in the narrowed vessels.

Supply and demand mismatch

Heed the warning signs

What to consider when choosing a workout venue.

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If getting in shape tops your list of New Year's resolutions, you're in good company. During the first few months of the year, sign-ups at fitness centers and health clubs tend to trend upward. While these memberships can be costly, you may be able to find more affordable options or take advantage of discounts. But no matter what you pay, shelling out a monthly fee may encourage you to use the gym regularly to get your money's worth. If you do, your heart will likely reap the rewards: regular exercise is one of the best ways to boost cardiovascular health.

"The main advantage to joining a gym is to have access to a wide variety of exercise equipment," says Alex Petruska, a senior physical therapist at the Sports Medicine Center of Harvard-affiliated Massachusetts General Hospital. That includes machines for a cardiovascular workout, such as treadmills, elliptical trainers, stationary bikes, and stair steppers, as well as a variety of weight machines.

Most often, bulges in the aorta near the heart are found by accident. Should you be screened for this rare yet dangerous condition?

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The aorta, the body's largest blood vessel, arises from the heart's left pumping chamber, then curves up and over the heart in a gentle arc. In some people, a weak spot in the aorta's wall causes the vessel to bulge outward like a worn-out bicycle tire. Called a thoracic aneurysm, this stealthy condition develops slowly and silently, rarely causing symptoms. And while some thoracic aneurysms are relatively harmless, others cause catastrophic problems. An estimated one in 10,000 people has a thoracic aneurysm, although the exact prevalence is unknown.

"Most thoracic aneurysms are discovered on an imaging test done for some other reason," explains Dr. Eric Isselbacher, associate professor of medicine at Harvard Medical School and co-director of the Thoracic Aortic Center at Massachusetts General Hospital. For example, an aneurysm might be visible on an echocardiogram (heart ultrasound) done during testing for an irregular heartbeat. Because the condition is so uncommon, testing everyone for a thoracic aneurysm doesn't make sense. But certain people face a higher risk than others (see "Who needs to be checked?").

Wristwatch-style fitness monitors use a sensor that detects blood flow through the skin to estimate a person’s heart rate. Some brands are more accurate that others, but none are as accurate as chest-strap monitors.