Showing posts with label liver. Show all posts
Showing posts with label liver. Show all posts

Friday, August 2, 2013

What Is Cholesterol?


I. What is cholesterol?


Cholesterol  is a fat-like complex, most manufactured by the liver. Our bodies need a certain amount of cholesterol to maintain normal function, but too much is harmful. Every cell in the body contains cholesterol. It is the manufacture of important hormones and vitamins essential substances. Cholesterol and lipoproteins need to be transported to various parts of the body. There are two lipoprotein cholesterol transport, namely low-density lipoprotein (LDL) and high density lipoprotein (HDL).

Low-density lipoprotein cholesterol is the culprit causing blood clots, is considered “bad” cholesterol. As for the high-density lipoprotein cholesterol, as cholesterol within the blood vessels to remove, it is considered “good” cholesterol.

II. Where cholesterol come from?


Body’s cells, especially liver cells, can produce cholesterol to maintain normal function, such as the manufacture of hormones and vitamins and so on.

In addition, cholesterol can be absorbed from food. Cholesterol content in different foods, such as Westerners like to eat animal foods, like whole milk, eggs and food oils, are of high cholesterol food. Fat, especially saturated fat, cholesterol levels can lead to even more enhanced. Usually saturated fat from animal food more than poultry and fish. On the other hand, from plant foods are mostly unsaturated fatty acids.

III. What is the relationship of cholesterol and heart disease?


When the body than the body needs cholesterol, it will accumulate in the blood vessel wall, causing blood vessels gradually harden and narrow, but on the surface, the body for a long time does not have any symptoms.

After years and years, deposition of cholesterol in the blood vessel walls, blocking blood vessels becoming more serious, will make the blood flow to vital organs slowly reduced. Therefore, when organs from the blood can not get enough oxygen and nutrients, will be very easy to necrotic.

If the supply of nutrient blood vessels blocking the heart, it is easy to cause coronary heart disease, including angina, myocardial ischemia, myocardial infarction; If the supply of nutrients the brain blood vessel blockage, will be a stroke.

IV. Heart disease common?


Heart disease is the world’s major diseases leading to death one, but if compliance with physician instructions, good diet, exercise control, the risk of heart disease can be greatly reduced.

1.            To prevent high blood pressure

2.            Is the movement to maintain

3.            A regular exercise schedule

4.            To maintain the concentration of cholesterol in moderate

High cholesterol is not uncommon, integrated all over the world statistics show that about fifteen to twenty-five percent of the people, cholesterol concentration above 240mg/dl, in other words, they get the opportunity to greatly increase coronary heart disease.

Therefore, high cholesterol, said health is a red light, are greatly increased risk of coronary heart disease. But the frightening thing is, even if high cholesterol, most people have no symptoms. Therefore, regular check-ups and keep the concentration of cholesterol in the moderate concentration of cholesterol is very important.

V. Normal cholesterol levels, reference values


Normal reference value of cholesterol is about 110 ~ 200mg/dl, if the 200 ~ 239 mg / dl are at high risk are close to the edge, and cholesterol concentration greater than 240 mg / dl, compared with high-risk range.

Cholesterol Level Recommendations
< 200 mg/dl <200 mg / dl Belongs to the ideal range
200~ 239 mg/dl 200 ~ 239 mg / dl Close to the edge of high risk, ask physicians about the diet instructions. Recommended cholesterol levels checked once a year. Has been suffering from a heart attack or if there are two or more risk factors, then it should belong to the high risk range.
> 240 mg/dl A high-risk range, three to six weeks, remember to check again to physicians. If still so, physicians need to do to comply with instructions.

VI. Easily lead to heart disease risk factors


    Hypertension
    Weight seriously overweight (overweight more than thirty percent)
    Smoking (more than ten per day)
    High-density lipoprotein cholesterol (HDL-C) is too low
    Someone in the family had suffered from coronary heart disease before age 55
    Diabetes
    Suffered from heart disease or vascular disease
    Men

VII. How to control cholesterol?


Lower cholesterol levels, can reduce fat deposition in the vessel wall, thereby reducing the risk of heart attack. According to the study, adults with high cholesterol, cholesterol levels, reduced by 1%, 2% lower risk of coronary heart disease.

Here are several ways to help you lower your cholesterol:

    Maintain a proper diet
    Weight control
    Proper exercise

VIII. How to maintain through diet moderate cholesterol levels?


Diet on cholesterol levels remain moderate, and increase heart health, it is very important. Only foods of animal origin contain cholesterol, such as beef, eggs, cheese and other dairy products, cholesterol in food causes the body to increase cholesterol, saturated fat, which is mainly caused by coronary heart disease. American Heart Association recommends that the heat obtained from the fatty foods, daily intake should not exceed 30% of total calories, while the daily intake of cholesterol should not exceed 300mg.

IX. Should be avoided to the types of fat foods?


Fat can be divided into three categories: saturated, polyunsaturated, monounsaturated fat. Avoid eating saturated fat, use monounsaturated fat, or multiple. Moderate consumption of multiple or monounsaturated fat, help to reduce the concentration of cholesterol in the body. A variety of foods contain different types of fat, so must know what kind of food, the highest content of saturated fat.

Saturated fat Oil, whether animal or vegetable oils, where the normal room temperature into a solid contains a high amount of saturated fat. Common are meat fat, butter, cream margarine and non-dairy products, coconut oil, “hydrogenated” or “partially hydrogenated” oil and so on.

Unsaturated fat Unsaturated fats come mainly from plants, can basically be divided into polyunsaturated and monounsaturated fat categories.

Polyunsaturated fat Polyunsaturated fat in the normal room temperature liquid. Are: safflower seed oil, cotton oil, sunflower seed oil, soybean oil, corn oil, nuts and seeds, fish fat, this fat calorie intake calories a day should not exceed ten percent.

Monounsaturated fat This type of fat in normal room temperature, but also in liquid form, the intake of calories a day should not exceed ten percent of total. Generally include: olive oil, peanut oil, Canoia oil.

X. Conclusion


If the cholesterol level higher than the normal reference range, periodically check the concentration of cholesterol, and consult a physician diet and life habits of the instructions actually make food, life control, for example, both the amount of fat intake, the type must be restrained to maintain the ideal weight, controlling blood pressure, continuous abstinence, etc., so that it can be suffering from vascular obstruction, greatly reduce the chance of coronary heart disease.

You can find recepies from American Heart Association here.


Friday, January 18, 2013

Left sided heart failure

Left sided heart failure is the term used to describe the incapacity of the left heart to supply tissues with blood. Left heart has two chambers known as left atrium and ventricle, which communicate thorough the mitral valve. The left atrium (the left upper chamber of the heart) receives oxygenated blood from the lungs, through pulmonary veins and this blood will be delivered to left ventricle (the lower left chamber). The whole amount of blood is pumped by left ventricle in the aorta (which is the main artery of the body) and then into the less large arteries that supply all the tissues and organs (kidney, liver, digestive organs, brain, limbs). Imagine blood flowing in the arteries as a liquid passing through a tube (pipe) and all the factors and interactions between them, which have great influence on the amount of blood that in the end each tissue will get and also the influence on the whole organism: e.g. blood consistency (a viscous blood will allow clots to appear), pressure that blood develops on arterial wall, the influence of arterial walls pressure on blood flow etc.

What is the cause for left sided heart failure?

Left sided heart failure is caused by different pathologies:
  • congenital heart diseases,
  • heart attack (the ischemia determines cardiac cells to die and a part of the heart is no longer functional),
  • coronary heart disease (a chronic ischemia of the heart tissue, a chronic deprivation of oxygen will determine tissues changes in order to adapt to the new condition and in the end cardiomyopathy and left sided heart failure)
  • high blood pressure forces the left heart to increase its labor and force, and the only way this can be possible is to increase number of muscle fibers (but the numbers of vessels will remain unchanged, so the same number of vessels will supply a larger number of muscle fibers, which will determine heart ischemia with all the consequences that result from this condition) and increase inside pressure (this pressure will act on heart walls to and will press the vessels which won’t be able to fill enough and this will lead to ischemia)
  • another cause of left sided heart failure is heart valves pathology: leaking valves (an amount of blood remains in the heart chambers creating a blood deficit in the tissues and forcing heart, at the next contraction, to throw in the aorta a larger amount of blood, this means a greater labor, which in time will lead to left sided heart failure) or narrow valves (the heart muscle must defeat the obstacle represented by the narrow valves),
  • heart muscle infection will determine cardiomyopathy and left sided heart failure,
  • excessive alcohol consumption will determine dilated cardiomyopathy and left sided heart failure,
  • thyroid dysfunctions,
  • heart muscle disorders,
  • major cardiac arrhythmia (irregular heart beats).

What happens in the systemic blood circulation, when there is a left sided heart failure?

Left sided heart failure
Compromise of left ventricular function will result in poor systemic circulation: muscle weakness, cool extremities, fatigue, low tolerance to effort, fainting, chest pain, palpitations, rapid heart beats, dizziness, confusion, memory impairment. Backward failure of left ventricle results in pulmonary congestion (blood will remain in the pulmonary veins creating a great pressure and determining shortness of breath, first on exertion and then at rest), hypoxemia (low level of oxygen in the blood), cyanosis (blue coloring of the extremities, because of the hypoxemia), tachypnea (increased rate of breathing), pulmonary edema (because of the great pressure in the pulmonary veins, the fluid from the blood will go through veins walls into the lung). Valvular heart disease may occur due to the increased pressures in heart chambers and pulmonary veins. Another symptom of left sided heart failure is paroxysmal nocturnal dyspnea (sudden and severe breathlessness attack during night, several hours after going to sleep).
If you have signs of left sided heart failure please call an MD for medical advice.

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