Ì첩ÌåÓý

Q. I take several medicines to get my blood pressure under control, and they seem to do the job. However, I get dizzy at times. Is there anything I can do, other than stopping my medications?

A. Many people occasionally feel dizzy if they stand up too quickly, and the older you get, the more likely this will happen. When you're lying down or sitting, less blood pressure is needed to send sufficient blood to the brain. But as you stand, the pressure must rise to deliver adequate amounts. If that doesn't happen fast enough, your brain can't function as well as it should, and you feel dizzy. Moving from a lying or seated position to a standing position more slowly usually helps if this is the underlying reason.

Apps that track and chart your blood pressure may be useful. But for now, avoid those that use the phone as a measuring tool.

Job strain—defined as having a demanding job in which you have little control—may slightly increase the risk of a stroke. The findings, in the February 2015 Stroke, echo earlier results that show a similar link between heart disease and job strain.

Researchers gleaned the results from 14 different studies that included more than 190,000 men and women from six European countries. Their average age was 42, and the follow-up lasted just over nine years, on average. Job strain was associated with a roughly 20% higher risk of ischemic stroke (the type that occurs when a clot blocks a blood vessel supplying the brain).

The telltale sign is leg pain and fatigue that comes on with activity and goes away with rest.

If you have high blood pressure, there may be better alternatives.

Exercise, eat a healthy diet, and manage blood pressure and cholesterol to lower your odds.

Poor sleep is linked to high blood pressure, diabetes, obesity, and heart disease. Now a study published in Neurology Dec. 10, 2014, suggests that people with conditions that rob them of oxygen and deep sleep are more likely to have changes in the brain that may lead to dementia. Researchers say conditions such as emphysema and sleep apnea reduce the amount of oxygen in the blood during sleep, which can lead to silent, undetectable "ministrokes." Researchers also found that people who spend less time in deep sleep, called slow-wave sleep, are more likely to have loss of brain cells than people who spend more time in slow-wave sleep. Slow-wave sleep is important in processing new memories and remembering facts. The researchers noted that past evidence has shown that using a continuous positive airway pressure (CPAP) machine for obstructive sleep apnea may improve cognition, even after dementia has developed. "Sleep quantity and quality are important to maintain optimal health and prevent disease," says sleep expert Dr. Lawrence Epstein, an instructor in medicine at Harvard Medical School. "By getting enough sleep, you ensure that you are getting all the types of sleep, which is necessary to maintain proper functioning."�

Well-educated people who report memory problems may face a higher risk of stroke.

Minor memory slips—such as losing your keys or forgetting an acquaintance's name—are common as we age. However, people who express concern about their memory may have a heightened risk of stroke, particularly if they're highly educated, according to a study in the January 2015 Stroke.

A device called RESPeRATE may help, but questions remain.

Beets rarely rank high on anyone's list of most-loved vegetables. But here's a reason to give these ruby-red roots another try: beet juice may help lower blood pressure, according to a study in the February 2015 Hypertension.

Beets contain naturally high levels of nitrates, which your digestive system converts into nitric oxide. This compound relaxes and widens blood vessels, which, in turn, lowers blood pressure.