Heart Health Archive

Changing lifelong habits is hard, but these practical tips can help.

When blood pressure persists above healthy limits, men are faced with a decision: take a medication now, or try to lower it with nutrition, exercise, and other lifestyle changes. Many men are reluctant to start taking a new pill every day—possibly for life. Although changing deeply ingrained habits can be hard, it really works.

Training the public how to do CPR saves the lives of people struck by cardiac arrest outside of a hospital, according to a study in The New England Journal of Medicine. The survival boost was markedly higher for men who experienced cardiac arrest outside the home.

In the United States, 420,000 people per year experience cardiac arrest outside of hospitals. It seems like a no-brainer that cardiopulmonary resuscitation (CPR) saves lives, but hard evidence has been lacking on exactly how many lives are saved. To help clarify the issue, researchers in Sweden analyzed more than 30,000 out-of-hospital cardiac arrests that occurred from 1990 to 2011. It's a good country to test CPR's power, since a third of the Swedish population knows how to do it.

Spending less time sitting and more time standing lowers blood sugar, cholesterol, and weight — all of which translates into a lower risk for heart disease. So says a study of Australian adults published in the July 30 issue of the European Heart Journal. Every two hours a day spent sitting was associated with an increase in weight and waist size, as well as in levels of blood sugar and cholesterol. As you might expect, time spent walking rather than sitting not only lowered cholesterol and blood sugar levels, but also reduced waist size and weight. Simply substituting two hours of standing for sitting also improved blood sugar and cholesterol levels. By making slight changes in your lifestyle to incorporate more standing, you could add important health benefits.

Q. My pulse is usually on the fast side. Does a high heart rate mean I have a problem with my heart?

A. In otherwise healthy people, I don't usually worry about the heart rate unless it is consistently above 100 beats per minute at rest. Heart rates that are consistently above 100, even when the patient is sitting quietly, can sometimes be caused by an abnormal heart rhythm. A high heart rate can also mean the heart muscle is weakened by a virus or some other problem that forces it to beat more often to pump enough blood to the rest of the body.

Ask the Doctor

Q. I've had a pacemaker for several years. Does it make sense to replace it with a newer model that is safe during an MRI scan?

A. Your concern is valid, given some estimates that many people who currently have an implanted cardiac electronic device will need magnetic resonance imaging (MRI) during their lifetime. Sometimes, computed tomography (CT) scans can be used instead. But MRI is the gold standard for diagnosing certain diseases of the brain and spinal cord.

A novel class of drugs has the potential to pick up the slack where other cholesterol medications leave off.

Research suggests benefits for a range of cardiovascular conditions.

Even if you don't have symptoms, repairing the valve sooner rather than later may be a wise choice.

The four valves of your heart work like one-way swinging doors, opening and closing in a perfectly timed sequence to propel blood through your heart and the rest of your body. But the leaflets (flaps of tissue that make up the valves) and nearby structures don't always function as they should. Perhaps because of the higher pressures in the heart's left side, the valves there are particularly vulnerable to problems. That includes the mitral valve, which separates the left upper and lower chambers of the heart (see illustration).

The types of fat and other nutrients found in plant- and animal-based protein foods should guide your choices.

A diet rich in polyunsaturated fats—found mainly in vegetable oils and fish—seems to protect people against cardio-vascular disease. A new study that measured blood levels of these fats in older adults now lends further support to this observation.

The report, in the June 17, 2015, Circulation, included more than 4,200 Swedish men and women without heart disease who were 60 years old when they joined the study. Researchers then tracked the participants' deaths over the following decade and a half. People with the highest blood levels of these beneficial fats were less likely to die from heart disease or any other cause than those with the lowest levels. Measuring the blood levels of these fats may be more reliable than asking people to recall what they ate, the researchers note.