ตากแดดช่วยลด ความดันโลหิต

thairath140122_001วารสาร “เรื่องโรคผิวหนัง” ของสหรัฐฯ รายงานว่า การตากแดดอาจจะช่วยลดความดันโลหิตลง ซึ่งจะป้องกันโรคหัวใจวายกับอัมพฤกษ์ อัมพาตได้

ทั้งนี้ จากการค้นคว้าของมหาวิทยาลัยเซาแธมป์ตันและเอดินเบอระได้พบว่า แสงแดดสามารถลดปริมาณสารไนตริกออกไซด์ ที่เป็นตัวอณูผู้แจ้งข่าวอยู่ในผิวหนังและเลือดให้น้อยลงไป มีผลทำให้ความดันเลือดลดต่ำลง

ศาสตราจารย์มาร์ติน ฟีลิสช์อธิบายให้รู้สาเหตุว่า “สารไนตริกออกไซด์รวมทั้งผลิตภัณฑ์ที่ถูกย่อยสลายซึ่งมีอยู่อุดมในผิวหนัง และมีส่วนเกี่ยวข้องกับความดันโลหิตด้วย เมื่อโดนแดด ปริมาณของไนตริกออกไซด์จำนวนน้อย จะถ่ายจากผิวหนังเข้าสู่กระแสเลือด ช่วยผ่อนความตึงตัวของหลอดเลือดลง ทำให้ความดันโลหิตลด พลอยทำให้ความเสี่ยงของอาการหัวใจวายและอัมพฤกษ์ อัมพาตต่ำลงด้วย”

รายงานยังได้พูดถึงการห้ามถูกแดดมากไปว่าจะทำให้เป็นมะเร็งผิวหนังนั้น ที่ถูกแล้ว การไม่ค่อยโดนแดดกลับจะเป็นอันตรายมากกว่า เพราะทำให้ ล่อแหลมกับการเป็นโรคหัวใจและหลอดเลือดที่เป็นกันอยู่อย่างดาษดื่น.

ที่มา: ไทยรัฐ 22 มกราคม 2557

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Sunlight Might Be Good for Your Blood Pressure: Study
Researchers figure out why, suggest not getting enough might raise risk for heart disease

Sunlight Might Be Good for Your Blood Pressure: Study
By Steven Reinberg
HealthDay Reporter
MONDAY, Jan. 20 (HealthDay News) — Sunlight is known to lower blood pressure, but now a team of British researchers has figured out why.

What they found is that nitric oxide stored in the top layers of the skin reacts to sunlight and causes blood vessels to widen as the oxide moves into the bloodstream. That, in turn, lowers blood pressure.

“This is an unexpected finding, in that the skin has not been considered to be involved in blood pressure regulation,” said lead researcher Martin Feelisch, a professor of experimental medicine and integrative biology at the University of Southampton.

Feelisch said he thinks — if this finding is confirmed in further research — exposure to ultraviolet light might help reduce the risk for heart disease. “That’s where it becomes interesting,” he said.

Among people with normal blood pressure, the effect of ultraviolet light is modest — a drop in blood pressure of between 2 and 5 millimeters of mercury (mmHG), Feelisch said.

“This is a mild effect,” he said. “But if you repeat this study in people with high blood pressure, I would predict you will see a more substantial drop.”

Avoiding sunlight or using sunblock constantly out of a fear of skin cancer could be a new risk factor for heart disease, Feelisch said.

He isn’t suggesting that people should sunbathe or use tanning beds in hopes of lowering blood pressure, however. What he recommended is spending a moderate amount of time outdoors.

“People are dying of skin cancer, and sunlight is the only known risk factor that contributes to skin cancer,” Feelisch said. “We are fully aware of that and don’t say everyone should get as much sun as possible. There is a very real risk — but so is the risk for [heart] disease. One of the main contributors to the disease is high blood pressure.”

Excessive exposure to sunlight carries the risk of developing skin cancer, Feelisch said, but too little might increase the risk of heart disease. However, more people die from heart disease than from skin cancer, he said.

“We believe current public health advice, which is dominated by concerns of skin cancer, needs to be carefully reassessed,” he said. “It’s time to look at the balance of risk for skin cancer and cardiovascular disease.”

The report was published Jan. 20 in the Journal of Investigative Dermatology.

Dr. Gregg Fonarow, associate chief of the division of cardiology at the University of California, Los Angeles, David Geffen School of Medicine, said high blood pressure is a major risk factor for stroke and kidney disease, in addition to heart disease.

That blood pressure levels are higher during winter and further away from the equator has been known, but the reasons behind these observations had not been entirely clear, he said.

“This new study finds that UV light exposure to the skin induced nitric oxide release and modestly lowered blood pressure, suggesting that this may play a role in modulating blood pressure,” said Fonarow, a spokesman for the American Heart Association.

Further studies are needed to determine the degree to which varying levels of light exposure might play a role in regulating blood pressure and reducing heart risk, he said.

For the study, Feelisch and his colleagues exposed 24 people with normal blood pressure to ultraviolet A radiation equal to spending about 30 minutes in the sun.

They found that the exposure widened the blood vessels, which significantly lowered blood pressure and changed the levels of nitric oxide in the blood.

SOURCES: Martin Feelisch, Ph.D., professor, experimental medicine and integrative biology, University of Southampton, United Kingdom; Gregg Fonarow, M.D., professor, medicine, and associate chief, division of cardiology, University of California, Los Angeles, David Geffen School of Medicine; Jan. 20, 2014, Journal of Investigative Dermatology

Last Updated: Jan 20, 2014

SOURCE : healthday.com

กินผักผลไม้อายุยืน ยิ่งกว่ากินเนื้อสัตว์

thairath130610_002ผู้ที่กินเนื้อสัตว์แต่น้อย กินแต่ผักผลไม้เป็นหลัก มักจะไม่ค่อยเสียชีวิตภายในช่วงเวลาเฉพาะใดๆ

ดร.ไมเคิล ออลิช หัวหน้าคณะศึกษา มหาวิทยาลัยโลมา ลินดา ในแคลิฟอร์เนีย กล่าวเปิดเผยผลการศึกษาต่อไปว่า นับเป็นหลักฐานเพิ่มเติมแสดงถึงคุณประโยชน์ของการกินมังสวิรัติ ในการช่วยป้องกันโรคเรื้อรังและทำให้อายุยืนยาว เคยมีการศึกษาก่อนหน้านี้มาก่อนว่าผู้ที่กินผักผลไม้เป็นหลักมักจะไม่ค่อยเสียชีวิตด้วยโรคหัวใจ หรือสาเหตุอื่นใดในช่วงเวลาเฉพาะใดๆ

การศึกษาครั้งใหม่ได้ทำจากข้อมูลของคนในอเมริกาจำนวน 73,308 คน เมื่อช่วงระยะเวลาระหว่าง พ.ศ.2545 และ 2550 ผลปรากฏว่า โดยรวมแล้วผู้ที่กินเนื้อสัตว์ ใน 1,000 คนในแต่ละปี จะเสียชีวิตลง 7 คน ในขณะที่ผู้ที่กินผักผลไม้ส่วนใหญ่ ใน 1,000 คน จะเสียชีวิตลงแค่ 5-6 คน โดยเฉพาะเพศชาย จะเป็นผู้ได้ประโยชน์สูงสุดจากการกินผักผลไม้.

ที่มา : ไทยรัฐ 10 มิถุนายน 2556

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The health benefits of eating low-fat diets based on vegetables, whole grains and fruit include lower blood pressure and improved cholesterol levels

The health benefits of eating low-fat diets based on vegetables, whole grains and fruit include lower blood pressure and improved cholesterol levels

Are vegetarian diets secret to long life? People who avoid meat have better health due to lower blood pressure

  • Study shows vegetarians 12% less likely to die than meat-eaters
  • Ingredients in red meat linked to increased risk of cancer and high blood pressure
  • Vegetarians more likely to drink less, smoke less and exercise more

By JENNY HOPE MEDICAL CORRESPONDENT

PUBLISHED: 23:21 GMT, 3 June 2013 | UPDATED: 23:46 GMT, 3 June 2013

Vegetarians live longer because of their diet – with men reaping the most benefits, claim researchers.

They found a cut in death rates for people eating vegetarian diets compared with non-vegetarians in a study of more than 70,000 people.

Over a six-year period, vegetarians were 12 per cent less likely to die from any cause, says a report published Online First by JAMA Internal Medicine.

It is thought the benefits come from lower blood pressure and improved cholesterol levels in people eating low-fat diets based on vegetables, whole grains and fruit.

Vegetarian diets have been linked to lower risk for several chronic diseases, including high blood pressure, metabolic syndrome, diabetes and heart disease.

An estimated three million Britons, around five per cent, are vegetarian and never eat meat or fish, including superstar musician Paul McCartney and his fashion designer daughter Stella McCartney.

Dr Michael Orlich, of Loma Linda University in California, and colleagues examined all-cause and cause-specific death rates in a group of 73,308 men and women Seventh-day Adventists.

Researchers assessed dietary patients using a questionnaire that classified them into five groups: nonvegetarian, semi-vegetarian, pesco-vegetarian (includes seafood), lacto-ovo-vegetarian (includes dairy and egg products) and vegan (excludes all animal products).

The study said vegetarian groups tended to be older, more highly educated and more likely to be married, to drink less alcohol, to smoke less, to exercise more and to be thinner.

Previous research has suggested vegetarian diets may extend life expectancy compared with meat-eating, but many of the studies have been small.

In the latest study there were 2,570 deaths among the study participants during an average follow-up time of almost six years.

There was a 12 per cent lower risk of dying from any cause for vegetarians compared with non-vegetarians.

Men fared better, as they benefited from a significant reduction in deaths from cardiovascular disease and ischaemic heart disease.

In women, there were no significant cuts in these categories of deaths.

The report said ‘These results demonstrate an overall association of vegetarian dietary patterns with lower mortality compared with the non-vegetarian dietary pattern.

‘They also demonstrate some associations with lower mortality of the pesco-vegetarian, vegan and lacto-ovo-vegetarian diets specifically compared with the non-vegetarian diet.’

The main reason for the difference is thought to be the effect of a low-fat vegetarian diet on cholesterol and blood pressure, partly through avoidance of red meat and also from higher consumption of vegetables.

Red meat, especially processed meat, contains ingredients that have been linked to increased risk of chronic diseases, such as cardiovascular disease and cancer.

These include heme iron, saturated fat, sodium, nitrites, and certain carcinogens that are formed during cooking.

Eating more vegetables and fruit may also help through their antioxidant effects, combating harmful naturally occurring chemicals in the body.

Official advice from the Department of Health in 2010 said cutting down on red meat could reduce the risk of bowel cancer.

Liz O’Neill, head of communications at the Vegetarian Society said ‘With higher intakes of fresh vegetables, pulses and other plant-foods, it seems obvious to many that balanced vegetarian diets are healthier than those reliant on meat, but we do not need to rely on gut instinct with so much hard evidence of that health advantage, both in the UK and abroad.

‘This new American study is significant because the nature of the community studied (Seventh Day Adventists) means that even the meat eaters included were leading a relatively health-conscious lifestyle.

‘The reported 12 per cent reduction in mortality was directly associated with being vegetarian, rather than having a healthy balanced diet.

‘Similarly UK studies indicate that vegetarians have lower rates of cancer and significantly lower (32 per cent less) rates of heart disease which are major causes of death in Britain.’

Findings from the largest British study of 45,000 Britons earlier this year found vegetarians have healthier hearts than people who eat meat or fish.

They were one-third less likely to need hospital treatment for heart disease or die from it.

SOURCE: www.dailymail.co.uk

 

การแพทย์แบบทางเลือกกดความดันโลหิตให้ลด

thairath130429_002แพทยสมาคมโรคหัวใจแห่งอเมริกากล่าวแจ้งว่า การแพทย์แบบทางเลือกอย่างการออกกำลังแบบแอโรบิก และการออกกำลังโดยใช้น้ำหนัก ก็อาจจะทำให้ความดันโลหิตลดลงได้ สมาคมได้กล่าวบอกในวารสารการแพทย์ “โรคความดันโลหิตสูง” ว่า ผู้ที่มีระดับความดันโลหิตสูงเกินกว่า 120/80 มม.ปรอท และผู้ที่อาศัยยาตามมาตรฐานการแพทย์ไม่ค่อยได้ผล อาจใช้การแพทย์แบบทางเลือกเข้าช่วยได้ เพียงแต่ว่ามันไม่อาจจะใช้แทนวิธีการรักษาอื่นๆ เช่น การออกกำลัง การลดน้ำหนัก ไม่สูบบุหรี่ หรือดื่มสุรามากเกินควร ไม่กินเค็ม และการกินยาตามแพทย์สั่งที่ได้รับการพิสูจน์แล้วได้ โรคความดันโลหิตเป็นชนวนของโรคหัวใจ และอัมพฤกษ์อัมพาต มีผู้มีอาการอยู่ทั่วโลกมากถึงร้อยละ 26 เป็นสาเหตุที่ทำให้เกิดการเสียชีวิตก่อน วัยอันควรไม่น้อยกว่าร้อยละ 13

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ที่มา :  ไทยรัฐ 29 เมษายน 2556

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Blood pressure check. (Credit: Copyright American Heart Association)

Blood pressure check. (Credit: Copyright American Heart Association)

Alternative Therapies May Help Lower Blood Pressure

Apr. 22, 2013 — Alternative therapies such as aerobic exercise, resistance or strength training, and isometric hand grip exercises may help reduce your blood pressure, according to the American Heart Association.

In a new scientific statement published in its journal Hypertension, the association said alternative approaches could help people with blood pressure levels higher than 120/80 mm Hg and those who can’t tolerate or don’t respond well to standard medications.

However, alternative therapies shouldn’t replace proven methods to lower blood pressure — including physical activity, managing weight, not smoking or drinking excess alcohol, eating a low sodium balanced diet and taking medications when prescribed, the association said.

High blood pressure — a major risk factor for heart attack and stroke — affects more than 26 percent of the population worldwide and contributes to more than 13 percent of premature deaths.

An expert panel assessed three alternative remedy categories: exercise regimens; behavioral therapies such as meditation; and non-invasive procedures or devices including acupuncture and device-guided slow breathing. The panel did not review dietary and herbal treatments.

“There aren’t many large well-designed studies lasting longer than a few weeks looking at alternative therapies, yet patients have a lot of questions about their value,” said Robert D. Brook, M.D., Chair of the panel and an associate professor of medicine at the University of Michigan in Ann Arbor. “A common request from patients is, ‘I don’t like to take medications, what can I do to lower my blood pressure?’ We wanted to provide some direction.”

The alternative therapies rarely caused serious side effects and posed few health risks, but the analysis revealed some approaches were more beneficial than others and could be part of a comprehensive blood pressure-lowering treatment plan.

Brook and colleagues reviewed data published in 2006-11, including 1,000 studies on behavioral therapies, non-invasive procedures and devices, and three types of exercise (aerobic, resistance or weight training and isometric exercises, most commonly handgrip devices).

The studies also examined the effects of yoga, different styles of meditation, biofeedback methods, acupuncture, device-guided breathing, relaxation and stress reduction techniques.

The panel found:

  • All three types of exercise reduced blood pressure. Walking programs provided modest benefit while, somewhat surprisingly, four weeks of isometric hand grip exercises resulted in some of the most impressive improvements — a 10 percent drop in systolic and diastolic blood pressure. However, isometric exercise should be avoided among people with severely-uncontrolled high blood pressure (180/110 mm Hg or higher).
  • Behavioral therapies such as biofeedback and transcendental meditation may help lower blood pressure by a small amount. However, there’s not sufficient data to support using other types of meditation.
  • Strong clinical evidence is also lacking to recommend yoga and other relaxation techniques for reducing blood pressure.
  • There isn’t enough evidence to recommend acupuncture for lowering blood pressure, particularly given the complexities involved in employing this treatment. However, device-guided slow breathing did prove effective in lowering blood pressure when performed for 15-minute sessions three to four times a week.

“Most alternative approaches reduce systolic blood pressure by only 2-10 mm Hg; whereas standard doses of a blood pressure-lowering drug reduce systolic blood pressure by about 10-15 mm Hg,” Brook said. “So, alternative approaches can be added to a treatment regimen after patients discuss their goals with their doctors.”

Story Source:

The above story is reprinted from materials provided byAmerican Heart Association.

 

SOURCE : www.sciencedaily.com