Hypertension and Stroke
The ability of today’s electronic books to display videos, images explained by a spoken voice, animations, interactive tools, and quizzes gives doctors new ways of explaining things. Harvard Health Publications and Orca Health have created a series of ten interactive iBooks focused on heart disease. Currently, these are available only as iBooks. Need to know what happens in the heart when a heart attack is underway, how doctors open up cholesterol-clogged arteries, or how to cope with the irregular heart rhythm known as atrial fibrillation? The answers are in these iBooks. They let users view the heart in ways and detail they’ve never seen before to learn about common heart conditions and procedures.
It’s easy to think of heart disease and stroke as an almost inevitable part of aging in a developed country like the United States. After all, they are our leading causes of death and disability. But the truth is that these are largely preventable conditions. New estimates from the Centers for Disease Control and Prevention (CDC) indicate that one-quarter of all deaths from heart disease and stroke are preventable. And that is almost certainly an underestimate. According to the report, published in Morbidity and Mortality Weekly Report, among American adults under age 75, approximately 200,000 of deaths caused each year by heart disease, stroke, and high blood pressure (hypertension) are preventable. Surprisingly, more than half of those preventable deaths occurred among individuals under age 65. The good news is that the rate of preventable death declined 29% from 2001 to 2010, the last year for which there are complete statistics.
Do-it-yourselfers, take heart. Here’s something else to do at home that can have a substantial benefit on your health: measure your blood pressure. It’s easy, inexpensive, and helps control blood pressure better than visits to the doctor. The latest evidence for the benefits of home blood pressure monitoring comes from researchers in Minnesota. In a 12-month clinical trial, 72% of those doing home monitoring had their blood pressure under control compared to 57% who received usual care. The benefits persisted six months after the program had ended. Anyone can monitor blood pressure at home. You can buy a good home blood pressure monitor at a pharmacy or online merchant for anywhere from $50 to $100. Some insurance companies cover the cost.
There’s something gratifying about volunteering. Whenever I work a charity event—which I try to do with some regularity—I often get more out of it than I give. A new study suggests that volunteering has positive implications that go beyond mental health, and may include better physical health. They study, from Carnegie Mellon University, found that adults over age 50 who volunteered on a regular basis were less likely to develop high blood pressure than non-volunteers. High blood pressure is an important indicator of health because it contributes to heart disease, stroke, and premature death. It’s impossible for this study to prove that volunteering was directly responsible for the lower blood pressure readings, but the results are in line with other findings on the topic. Aristotle once surmised that the essence of life is “To serve others and do good.” If this line of research is any indication, serving others might also be the essence of good health.
My twice-daily walks with my border collie, Clair DeNoon, are the highlights of my day. A new report from the American Heart Association will put an extra spring in my steps on these walks. A panel of experts from the American Heart Association has weighed all the available evidence on pet ownership and cardiovascular disease. The verdict: Having a pet—a dog in particular—likely lowers the risk of heart disease. Some of the connection can be attributed to the extra walks dog owners take. Companionship also contributes. If dog ownership is heart healthy, should everyone who cares about heart health have a dog? No. According to the heart association panel, “the primary purpose of adopting, rescuing, or purchasing a pet should not be to achieve a reduction in cardiovascular risk.”
Salt is a cheap, easy way to turn on taste buds. That’s one reason why it’s in so many of the foods we eat. It’s so commonly used that most Americans consume more than double the recommended daily limit for it. Three new studies in BMJ (formerly the British Medical Journal) once again confirm the relationship between salt intake and health problems. They show that reducing salt intake can help lower blood pressure and lower the odds of having a heart attack or stroke or developing heart failure. They also show that consuming more potassium is also linked to lower blood pressure and lower risk of stroke. Current dietary guidelines recommend that Americans get no more than 1 teaspoon of salt a day. That’s the equivalent of 2,300 milligrams (mg) of sodium a day. Most Americans get much more than that. It’s possible to cut back by avoiding processed and packaged foods, using herbs and spices to season food instead of salt, and other strategies. It’s best to get potassium from food, especially fruits and vegetables. Green leafy vegetables, beans, and bananas have a lot of potassium.
If you like numbers and statistics, especially those about health, two reports released this week should keep you occupied for days: the massive Global Burden of Disease study was published in The Lancet, and the American Heart Association released its annual “Heart and stroke statistics” report. The Global Burden of Disease project found that average life expectancy continues to rise in most countries. It also found that infection and other communicable causes of disease no longer dominate deaths and disability. Today, so-called non-communicable causes like traffic accidents, violence and war, heart disease, cancer, and other chronic conditions account for two-thirds of world deaths and the majority of years lost to disability and death. According to the American Heart Association’s annual report, the percentage of deaths due to heart attack, stroke, and other cardiovascular diseases has fallen by nearly one-third since 1999, but don’t expect that to continue. Increases in high blood pressure, high cholesterol, diabetes, overweight, and inactivity threaten to reverse these gains.
The term “stroke” conjures up a frightening bolt out of the blue. It certainly feels that way when it happens. But the sudden onset hides most strokes’ decades-long development stemming from slow but steady damage to blood vessels, the growth of artery-clogging plaque, or the erratic heart rhythm known as atrial fibrillation. This long gestation means it is often possible to avoid a stroke by fighting arterial corrosion. Today is World Stroke Day—a moment to pay close attention to stroke. Worldwide, this brain-damaging condition afflicts millions of people each year, and kills more than 6 million. In the United States, about 800,000 people have strokes each year, and about 140,000 die from them. There are two main messages of World Stroke Day: Stroke can be prevented. Stroke can be treated if detection and treatment happen quickly.
Better attention to four common health factors could go a long way to preventing a stealth condition known as peripheral artery disease (PAD). That’s the upshot of a Harvard-based study published today in JAMA. PAD usually refers to blockages in the arteries that supply blood to the legs and other body parts below the heart. Such blockages can cause widespread damage, limit activity, and sometimes lead to death. In the new study, the factors that most strongly influenced the development of PAD were the same “big four” that are largely responsible for heart disease and stroke: smoking, diabetes, high blood pressure, and high cholesterol. Prevention is the best medicine. Quitting smoking and keeping blood pressure, cholesterol, and blood sugar under control can prevent PAD from getting established, or slow the disease process and possibly improve symptoms. Also important are exercise, a healthy diet, and taking medications as needed to protect the heart and arteries.
Succulent tomatoes are far more than just a delicious fruit. Eating them may also help lower your risk of stroke, likely due to the lycopene they contain. Lycopene is a powerful antioxidant that eliminates dangerous free radicals that can damage DNA and other fragile cell structures. Past research has shown that a diet rich in lycopene-containing foods may help lower the risk of prostate and other cancers. Now, in a report just published in the journal Neurology, a team of Finnish researchers has linked higher lycopene levels in the blood to protection against stroke. The researchers suggested that lycopene, in addition to its ability to attack free radicals, may also reduce inflammation and cholesterol, improve immune function, and prevent blood from clotting. All of these may help reduce ischemic strokes, which are caused by clot-caused blockages in blood flow to the brain. It’s best to get lycopene from food—tomatoes and watermelon are excellent sources—not supplements.