Blood Pressure Archive

Q. Some friends invited me to accompany them to Rocky Mountain National Park. I would love to go, but I have high blood pressure and worry that high altitudes are dangerous for people with  high blood pressure. Is that the case?

A. If you have high blood pressure but are otherwise healthy, your blood pressure is under control, and you take some precautions, a trip to the Rocky Mountains should be fine.

In the journals

Eating a cup of blueberries every day may help your blood pressure, suggests a new study. The results, published online Feb. 16, 2019, by The Journals of Gerontology, Series A: Biological Sciences and Medical Sciences, found that consuming 200 grams of blueberries (about one cup) daily can improve blood vessel function and decrease systolic blood pressure (the top number in a blood pressure reading).

Researchers recruited 40 healthy men and randomly gave them either a drink containing 200 grams of whole wild blueberries or a control drink (which looked and tasted much the same) every day for a month. The team also monitored the men's blood pressure as well as the flow-mediated dilation of the brachial artery in their upper arms. This measures how the artery widens when blood flow increases and is a marker of reduced cardiovascular disease risk.

It's usually best to get calcium, magnesium, and potassium from food. Are you getting enough?

A healthy, balanced diet plays a major role in blood pressure control. And you should consume some specific minerals on a regular basis for good blood pressure management: calcium, magnesium, and potassium. But do most of us get enough of these? "If you're eating a healthy diet, you probably have nothing to worry about. But people eating a diet of processed and canned foods or taking certain medications might not be getting enough of these micronutrients," says Dr. Randall Zusman, director of the Division of Hypertension at the Massachusetts General Hospital Heart Center.

Regularly eating whole grains can help you lower “bad” cholesterol, triglycerides, and blood pressure. A diet rich in whole grains also “is associated with a lower risk of developing cardiovascular disease, type 2 diabetes, metabolic syndrome, and certain types of cancer,” says Dr. Qi Sun, an associate professor at Harvard Medical School.

In a study published in JAMA Internal Medicine, Sun and colleagues reported that eating whole grains may even extend your life. Sun used the diet information of more than 100,000 men and women whose health was followed for more than 20 years. The study found that those who regularly ate whole grains had a 9% lower overall death rate and a 15% lower death rate from heart disease.

Try losing weight, changing your diet, and exercising.

Sometimes getting your blood pressure under control requires that you take several medications each day, such as a diuretic and a calcium-channel blocker. But some therapies don't involve medication. "People who have drug intolerances or are unwilling to take medications can try pill-free therapy, and it can also be used to make a medication regimen more effective," says Dr. Randall Zusman, a cardiologist and Harvard Medical School associate professor.

News briefs

If you haven't talked to your doctor lately about your blood pressure, it may be time for a check-up. The definition of high blood pressure (hypertension) changed in November 2017, when the American College of Cardiology and the American Heart Association released new guidelines for diagnosis and treatment of the condition. High blood pressure used to be diagnosed at a measurement of 140/90 millimeters of mercury (mm Hg) or higher. Now these authorities state that if your blood pressure is 130/80 mm Hg or higher, you have hypertension. A normal blood pressure measurement is the same as it was before: less than 120/80 mm Hg. What if your blood pressure is in between normal and the new hypertension threshold? That's considered "elevated," something that should be watched and addressed with exercise, a healthy diet low in salt, limited alcohol intake (no more than one drink per day for women, one or two drinks per day for men), and weight loss as needed. The new guidelines are based on evidence that having a systolic (top) measurement from 130 to 139 and a diastolic (bottom) measurement from 80 to 89 doubles the risk for having a heart attack, stroke, or other complications.

Image: © eduardrobert/Thinkstock

This checklist can help ensure accurate readings both at the doctor's office and at home.

 Image: © Maica/Getty Images

Blood pressure is a key indicator of cardiovascular health. So it's vitally important to make sure that you check yours regularly — and accurately. But according to the American Heart Association (AHA), health care professionals don't always follow the proper techniques when measuring a person's blood pressure. The AHA cites seven common errors (detailed below) that can lead to an artificially high blood pressure reading.

Plus, there's one additional step that may be overlooked after you get a blood pressure reading of 130/80 mm Hg or higher, a level that defines high blood pressure, says endocrinologist Dr. Naomi Fisher, director of the Hypertension Service and Hypertension Innovation at Brigham and Women's Hospital.

Ask the doctor

Q. Why are the blood pressure readings in my right and left arm different even when they're taken within a minute or two of each other?

A. The answer depends on how big of a difference you're talking about. A difference of just a few points (that is, a few millimeters of mercury, or mm Hg) is nothing to worry about. It's actually quite normal, even when both arms are checked almost simultaneously.

Here's what you need to know about the discovery of contaminants in a popular class of heart medications.

Last summer, a number of prescription medications containing the generic drug valsartan were recalled by manufacturers after investigators found trace amounts of possible cancer-causing impurities in some of the products. Over the following months, additional lots of valsartan, as well as batches of two similar drugs, losartan and irbesartan, were also pulled from pharmacy shelves.

All three of these drugs belong to a class of medications known as angiotensin-receptor blockers, or ARBs. These drugs block the effects of a hormone that narrows blood vessels and are used to treat high blood pressure and heart failure. The recalled products also include combination drugs that contain one of those three ARBs. (See "Medication recall information" for accessing the list of affected products.)

On call

Q. I know that erectile dysfunction can be a common side effect of blood pressure medications, but can they also lower my sex drive?

A. Sexual issues are a side effect of many medications, including ones prescribed to lower blood pressure. You're correct that erectile dysfunction (ED) is mentioned most frequently. But blood pressure medicines also can decrease sexual drive or make it more difficult to reach orgasm.