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Why Low Cholesterol is NOT Good For You

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Too little of one type of cholesterol has been linked to memory loss and Alzheimer’s disease.

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Scientists studied more than 3,500 civil servants to investigate how levels of HDL or “good” cholesterol were associated with memory. HDL cholesterol can influence the formation of the beta-amyloid “plaques” that are a distinctive feature in the brains of Alzheimer’s patients.

Higher levels of HDL are also believed to protect against damage to blood supply caused by the narrowing of the arteries.

After the five-year study period, the researchers found that people with low levels of HDL were 53 percent more likely to suffer memory loss than people with the highest levels of HDL.

Those with impaired memory are at an increased risk of developing dementia later in life.
You may click to see:->What is the normal level of cholesterol?
Sources:

* BBC News June 30, 2008

* Arteriosclerosis, Thrombosis, and Vascular Biology June 30, 2008

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Lowering Cholesterol in Kids Starts with Diet, Exercise

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According to guidelines recently released by the American Academy of Pediatrics, statins may be needed to prevent harmful plaque buildup.

At first blush, the new guidelines on cholesterol control in children were shocking. Statins, one of the most frequently prescribed drugs for adults worldwide, could be prescribed for some children as young as 8, according to recommendations released last week by the American Academy of Pediatrics.

But the vast majority of children will never in their pre-pubescence or teens pop a pill to lower cholesterol. Nor will their parents want them to. “I hear it every time I see parents,” says Dr. Alan Lewis, a pediatric cardiologist and director of the lipid clinic at Childrens Hospital Los Angeles. ” ‘I don’t want my kid taking a pill.’ ”


You may click to see:-

>For youths at risk for high cholesterol, statins are the best remedy

>There are statin alternatives — but check with a doctor first

 

For most children, the new guidelines will simply serve to alert parents that their kids could be accumulating plaque in their arteries that will set them on a road to early heart attacks or strokes. “My own practice and the new guidelines emphasize the importance of lifestyle as the approach to lowering the risk of cardiovascular disease,” Lewis says.

Whether you’re a kid or a grown-up, here’s how to adopt that lifestyle.

Diet and exercise

Children ages 2 to 10 who test in the acceptable range (total cholesterol less than 170 milligrams per deciliter of blood) should simply keep up the good work. Those who test in the borderline range (total cholesterol 170 to 199) need to make some changes in what they eat and how much they exercise. (For adults, total cholesterol of less than 200 is desirable; 200 to 239 is borderline high; above 240 is high, carrying with it twice the risk of heart disease as a level below 200.)

It’s children who test at elevated levels, above 200, who bump into the controversial recommendation of taking a statin as part of their preventive therapy. Even then, “you should always start with lifestyle modifications,” says Dr. Stephen R. Daniels, chairman of the department of pediatrics at the University of Colorado School of Medicine in Denver and lead author of the guidelines.

For starters, dietary fat intake should be lowered to less than 30% of calories, with saturated fat, found in meat and whole-milk dairy products, less than 10% of calories and no more than 200 milligrams of cholesterol a day.

If that doesn’t do the trick, Lewis says, cut saturated fat to 7% of calories, keeping total fat below 27%. Trans-fatty acids should be all but eliminated, with the recommendation at less than 1% of calories. (The American Heart Assn. recommends that all adults keep dietary fat below 30% of daily calories, with no more than 7% of daily calories from saturated fat, and less than 1% from trans fats.) Kids as young as one year, according to the new guidelines, can cut out whole milk and start drinking reduced fat milk. The biggest influence on blood cholesterol is the mix of fats in the diet. Saturated fat, found mostly in animal products but also in coconut and palm oils, increases blood cholesterol levels the most.

Fiber, in the form of whole grains, fruits and vegetables, can lower cholesterol. It binds bile and blood cholesterol to form waste, which the body eliminates. If a fiber supplement is used, the guidelines suggest a dose of the child’s age plus 5 grams a day, up to a dose of 20 grams a day at age 15. Long-standing government recommendations suggest that young kids 2 to 3 should get three ounces of grains a day, building up to seven ounces by age 14 to 18. A slice of whole-grain bread, one-half cup of cooked brown rice and one-half cup of cooked oatmeal add up to about three ounces. Fruits and vegetables also contain fiber, and young children should get a cup of each, building up to two cups of fruit and three cups of vegetables for kids 14 and older.

The new guidelines recommend exercise in general, though without a recommended amount. Exercise in adults has been shown primarily to increase levels of HDL, the protective cholesterol, though it has little effect on lowering LDL. But exercise can also lead to weight loss, and weight loss has been proven to lower total cholesterol in adults.

Children with less than ideal cholesterol levels could need up to six months of lifestyle changes before results are seen.

One study of children 8 to 11, published in the May 10, 1995, Journal of the American Medical Assn., found that those who kept their total fat calories to 28% and saturated fat to 8% of calories dropped levels of LDL cholesterol by an average of 15 points over three years, compared to those in a control group who ate their normal diet.

For children whose cholesterol is mildly or moderately high, the reduction could get them into the normal range. The National Institutes of Health-sponsored study, the Dietary Intervention in Children Study, also found that after three years, children who were in the group that received aggressive nutrition education consumed 67% of their calories from heart-healthy foods, compared to 57% in the group that received no counseling.

Studies of adults have shown that bad cholesterol can be lowered by 5% to as much as 20% by lifestyle changes, including quitting smoking.

Losing excess weight, which requires lowering calories and fat consumption and increasing exercise, is the most successful strategy for lowering cholesterol. “Before starting a statin, try losing 20 pounds,” says Dr. David Becker, cardiologist at the University of Pennsylvania Health System.

“In most kids, you’d want to work on this for three to six months before you go to a more aggressive treatment,” Daniels says. If during that time physicians see evidence of improvement in lower cholesterol numbers and lost weight, the lifestyle treatment could continue without adding a drug.

Leading by example:

For adults and children alike, it’s clear that increasing physical activity while changing eating habits to include more fruits, vegetables, fiber, whole grains and fish and less saturated fat and sugar is easier said than done. But children have an advantage. Their bad habits are relatively new, not ingrained for decades, and might be easier to overcome.

“If children can be introduced to these more healthful lifestyle features — healthy diet, exercise, weight control — then we have a chance that this becomes natural for them,” Lewis says. Making the changes is labor intensive, often involving a nutritionist, an exercise physiologist and a physician advising the entire family. “The children and the family share the same food at the table, the same gene pool,” Lewis says. “It’s really important to get the whole family involved.”

And often, lifestyle changes work. “Adoption of a nutritional approach can usually reduce the serum cholesterol,” Lewis says.

“And if it’s mild to moderately elevated can often lower it to within the normal range. For the majority of children, the nutritional approach is really all that they need.”

Sources: Los Angles Times

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The Omega Balance

Without question, each of us needs omega-6 and omega-3 fatty acids in our diet. But the balance between the two has recently become the center of a hot debate.

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These two key polyunsaturated fats are called “essential fatty acids” because our bodies can’t manufacture them; they must come from the foods we eat. Each has its own actions in the body, often opposing each other: omega-6s, for example, are converted in the body to substances that assist in responding to inflammation and bleeding; omega-3s, by contrast, convert to substances that slow blood clotting and decrease inflammatory responses. Together, they work as a check-and-balance system of sorts, and some researchers argue that our modern Western diets have thrown that balance out of whack.

Throughout most of human history, since our Paleolithic ancestors first hunted game, speared fish and gathered wild greens, humans have eaten a diet that kept the omega-6 to omega-3 balance fairly equal—”close to a 2 to 1 ratio,” notes Artemis Simopoulos, co-author of The Omega Diet. This pattern continues in the traditional diet of Crete, where heart disease and cancer rates are among the lowest in the world.

But in the United States, omega-6 fatty acids now dominate the ratio because people are eating more processed foods, such as chips and packaged cookies, which are made with high-omega-6 oils like soybean or cottonseed. Our meats, poultry and dairy products have also become more omega-6 heavy as we feed our animals grains instead of grasses. Today, the omega-6 to omega-3 ratio hovers around 17 to 1, says Simopoulos, explaining that this imbalance is a key contributor to the modern plague of heart disease. “Major dietary studies have shown that when people are fed diets that lower this ratio, their death rates from heart disease fall significantly.”

Not everyone agrees that increased omega-6s threaten our health, however. Frank Hu, of the Harvard Nurses’ Health Study, argues that omega-6s also have beneficial effects on heart-disease risk. “Because omega-6 has very strong LDL-lowering effects, it actually lowers the LDL to HDL ratio, which is the most powerful predictor of heart disease.” Reducing omega-6 levels, then, would take away some of those benefits.

Although he is skeptical, Hu suggests the following for anyone who wants to lower their omega-6 to omega-3 ratio: focus on getting more omega-3s, rather than cutting omega-6s, by eating more fish, freshly ground flaxseeds and walnuts, and by using oils that provide omega-3s, like canola and walnut.

Simopoulos counters, “If you have too many omega-6s, you can’t use omega-3s as efficiently. To get the full benefit of omega-3s, you must lower the omega-6 to omega-3 ratio.” She recommends following a dietary pattern similar to that of the traditional diet of Crete: vegetable-and-fruit laden, low in saturated fats, generous in omega-3s and stingy with omega-6s. “It is the diet on which humans evolved, and which our genetic profile has adapted to.”

Related Omega-3 Recipes:

* Basic Basil Pesto
* Orange-Miso Sauce
* Edamame Lo Mein
* Grilled Rosemary-Salmon Spedini
* Chard with Shallots, Pancetta & Walnuts

Sources:http://bl147w.blu147.mail.live.com/mail/mail.aspx?&n=1809073841

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Opening Your Heart

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The poets and songwriters deduced it correctly; the ultimate irrevocable act of love is giving your heart to someone else. The heart is the fulcrum on which the pendulum of life swings. Its continued non-stop, efficient, self-regulating pumping action supplies essential oxygen to all the tissues of the body. It looks rather unromantic though  it is made of muscle and is the size of a clenched fist. It is nurtured and oxygenated by the coronary arteries which snake over its surface.

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………………………Stents have reduced the need for bypass surgery to 1 per cent

At birth we have open, pliant coronary arteries, but a lifetime of abuse with a sedentary lifestyle, smoking, an unhealthy diet and obesity takes its toll. Fat deposits form plaques on the arterial walls making them irregular, narrow and stiff, eventually blocking them. The blood supply to the muscles of the heart is then compromised, causing ischemia with chest pain, sweating and a feeling of impending doom   the characteristic symptoms of angina. Heart disease is more likely to occur in diabetics, people with high blood pressure, smokers and those with elevated abnormal lipid profiles. The first attack can be fatal in 50 per cent of the people in the first two hours if they do not receive adequate emergency intervention.

Angina is the classic precursor to a heart attack. The pain can occur at night, or be precipitated by varying degrees of activity. It can initially be managed with medication like glyceryl trinitrate, sorbitrates, calcium channel blockers and clot-preventing medication like aspirin or clopidogrel. If you go to a cardiologist, he may opt for a coronary angiogram to outline the blood supply to the heart. This is performed by inserting a thin tube through an artery in the arm or leg and then guiding it into the heart. A dye is then injected, so that the arteries can be seen.

A catheter is inserted into a larger artery, usually the femoral artery in the groin. It has a tip called a balloon which can be dilated. This opens up the narrowed vessel and also pushes through the clot, dispersing it. This procedure can minimise or stop a heart attack if performed in time. This technique was first used in 1977. The results were not very encouraging. Restenosis (narrowing of the arterial walls once again) occurred in 30-40 per cent of the people within six months of the process. The procedure and technique have improved vastly in the last 30 years. Metal stents can now be inserted through the balloons. These are coiled springs which open up when released from the balloon. They function as a scaffold and hold the coronary vessel open. The bare metal stents reduce the risk of restenosis to less than 20 per cent.

Newer drug eluting stents  or medicated stents that slowly release their contents   are available. They are far more expensive, costing anything between Rs 70,000 and Rs 3.5 lakh, depending upon various factors such as the make of the stent, doctor’s fee, hospital charges, etc. There is still debate as to whether they are really worth the expense. At present the three major drugs present in the various stents are: paclitaxel, sirolimus or a drug called ABT580, depending on the manufacturer. Although each company claims that its stent is the best, they are all equally effective. The particular one used depends on the individual preference of the cardiologist. Restenosis occurs in less than 10 per cent of patients.

Stents once inserted cannot be removed. If blockage occurs in another part of the artery a new stent has to be placed there. The expertise of the cardiologist is necessary to estimate the size of the block and the vessel, choose a stent of the correct size, and insert it in the proper place. If any of these parameters are miscalculated there will be leaks, restenosis and inefficiency. The stents (drug eluting or bare metal) have reduced the need for bypass surgery to 1 per cent. Bypass surgery is still required in complicated cases especially when the left coronary artery is involved.

Survival after a heart attack before 1967 meant a lifetime of medication, restricted activity and a Damocles  sword of sudden death. This scenario changed when the first Coronary Artery Bypass Graft (CABG) surgery was performed in Cleveland Clinic in the US in the late 1960s. It became possible to surgically bypass the blocked, narrowed and inefficient areas of the coronary blood vessels, using the saphenous vein from the leg or the internal mammary artery from the chest wall. Depending on the number of blocks and the expertise of the surgical team, two, three, four and even five blocks can be bypassed.

The heart may have to be stopped and the entire circulation supported during the time of surgery with a heart lung machine. Today, surgical techniques have advanced, and minimally invasive CABG can be performed without stopping the heart.

Stents are not a miracle cure. For the best long-term results, patients still need to

Control diabetes and hypertension

Achieve their ideal body weight

Continue their anticlotting medication of aspirin and clopidogrel.

Sources: The Telegraph (Kolkata, India)

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Fish Oils Offer Lupus Treatment

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Scientists have found that low dose dietary supplementation with omega-3 fish oils in systemic lupus erythematosus (SLE) – a chronic inflammatory disease that can affect the skin, joints, kidneys, lungs, nervous system, and other organs of the body – has a significant therapeutic effect on disease activity……click & see

It also improves endothelial function and reduces oxidative stress and may therefore confer cardiovascular benefits, according to a study presented at the American College of Rheumatology Annual Scientific Meeting in Boston, Massachusetts.

In a study, 60 patients with lupus were randomly assigned in a double-blind, placebo controlled trial to determine the effect of dietary supplementation with omega-3 polyunsaturated fatty acids on disease activity and endothelial function.

The researchers employed various methods to measure lupus disease activity, and to study endothelial function and cell damaging free radical molecules in this 24-week study.

Participants who had been taking omega-3 fish oil showed significant improvement in all areas of measurement, including improved blood vessel function and a reduction in cell damaging molecules, at the end of the study. This in turn provided the subjects with potential cardiovascular benefits.

According to the researchers, there was also a significant improvement in a number of the symptoms of active lupus.

This study confirms the beneficial effects of omega-3 fish oils in improving the symptoms of SLE and also provides evidence for the potential cardioprotective effect they may have in this group of patients,” said Dr Stephen Wright, specialist registrar in rheumatology, department of therapeutics and musculoskeletal education & research unit, Queen’s University of Belfast, Northern Ireland, and lead investigator in the study.

Source: The Times Of India

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