Heart Health Archive

Atrial fibrillation is a heart rhythm disorder that affects millions of people. It can lead to potentially disabling or deadly strokes. Researchers from Johns Hopkins University School of Medicine adding motion-tracking software to standard MRI heart scans of 149 men and women with atrial fibrillation. The scans revealed specific changes in the muscles of the left atrium that increased stroke risk in some of the volunteers. These changes were not associated with age or other risk factors for stroke. This could help many people with this condition to avoid taking warfarin or other clot-preventing medications for life. But it is much too early to include MRI as part of the standard evaluation of people with atrial fibrillation — not to mention that such scans would significantly increase the cost of these evaluations. For now, doctors will continue to use standard tools to help determine stroke risk.

Yoga is good for the muscles and the mind. New research suggests that it may also be good for the heart. A review of yoga and cardiovascular disease published in the European Journal of Preventive Cardiology indicates that yoga may help lower heart disease risk as much as conventional exercise, such as brisk walking. It can help people lose weight, lower blood pressure and cholesterol, and ease stress. Each of those changes works to prevent heart disease, and can help people who already have cardiovascular problems.

Q. The other night I woke up at about 2 a.m., and my heart was pumping hard and my lower jaw ached. It lasted about an hour, even though I took aspirin. Then I fell asleep. In the morning everything was fine. Was that a heart attack?

A. If you were my patient and you called my office and told me this, I would tell you to come right in and let me check you out. Probably it was not a heart attack, but the chance that it might have been is high enough that you need to be examined and tested. I hope that's what you did. If you didn't then, you should check with your doctor now.

Making smart changes in behavior prevents damage to healthy and not-so-healthy arteries.

Every day, you make dozens of health-related decisions that influence the long-term well-being of your heart and arteries, from what you put in your mouth to how often you move. These lifestyle choices, along with factors such as high blood pressure, high cholesterol, or diabetes, may promote plaque buildup inside your arteries. Over time, that plaque (which contains fat, fibrous tissue, and often calcium deposits) may block blood flow, setting the stage for a heart attack or stroke.

Q. I had a mild heart attack a few years ago but am now feeling fine. I'm planning a trip to Colorado. Is it safe for me to hike at high elevations?

A. If you're feeling well and don't have any cardiovascular symptoms, hiking in the Rocky Mountains should probably be fine, though you should check with your cardiologist first. Doctors used to advise people with cardiovascular conditions—even just high blood pressure—not to spend time at high altitudes. But there wasn't much evidence behind that recommendation. Now, there's a general consensus that ascending up to 12,000 feet should be fine for most people with heart disease. Exceptions include people with unstable cardiac disease, heart failure, or severe lung disease, such as pulmonary hypertension.

When your heart muscle doesn't get enough blood, chest pain is possible. But you might not feel anything at all.

Small, wireless skin patches may offer a convenient way to diagnose—or rule out—arrhythmias.

An abnormal heart rhythm—when your heartbeat is too slow, too fast, or irregular—may be a fleeting, harmless event. But it might be a sign of a more serious heart condition. If you have frequent palpitations (which feel like your heart is pounding, racing, or fluttering) or unexplained fainting spells, your doctor may recommend a Holter monitor. This portable electrocardiogram (ECG) machine records your heart rhythm over a day or two.

Eczema, an itchy, scaly skin disease that usually starts early in life, may make people more prone to heart disease and stroke, according to a study in the Jan. 8, 2015, Journal of Allergy and Clinical Immunology.

Researchers relied on data from more than 61,000 adults who took part in the 2010 and 2012 National Health Interview surveys. They found that people with eczema smoke and drink more and are less likely to exercise than people without the disease. (Sweating aggravates eczema, making exercise a challenge.) Other factors that boost heart disease risk—such as severe obesity, high blood pressure, and high cholesterol—were also more prevalent among people with eczema. So were sleep disturbances, which were linked to even higher odds of having those risk factors.

Preventing stroke is the top priority if your heart is beating irregularly. A variety of options can control symptoms.

A flutter in the chest and a racing heartbeat could be just a passing cardiac blip, perhaps triggered by emotional stress or too much caffeine. But sometimes it's a sign of atrial fibrillation—the irregular quivering of the heart's upper chambers, or atria.

Q. I have a pacemaker and was told to never have an MRI scan. Is there any way around that?

A. In the past, people with pacemakers were told never to have magnetic resonance imaging (MRI), but in certain cases it may be safe.