вторник, 29 января 2013 г.
Инвестиционный банк Ренесcанс мощный проект на поле онлайн кредитов
пятница, 25 января 2013 г.
Hypertension Types and Effective Treatments
Our body is a kind of machine that needs lots of attention to keep it working properly. When it gets tired and feel drowsy you should give it rest and sound sleep. If it feels hungry you will give it food and nutrients. But, one day we feel really tired all of the time, we have headaches and we do not feel like ourselves. These are symptoms related to a number of different things so we try our own medications and we feel better for a little bit. Then it all comes back so we decide to see a doctor. This is when we find out that we have hypertension.
There are two types of hypertension and they are essential, or primary, hypertension and secondary hypertension. The cause of essential, or primary, hypertension is difficult to find but treatment is available for it. On the flip side, when we know the cause of the hypertension it is called secondary hypertension.
Hypertension caused by the kidney is called renal hypertension. The causes of renal hypertension could be stenosis or arteriosclerosis. Stenosis is the narrowing of the renal artery caused from the hardening of the muscular wall of the artery. Arteriosclerosis is also the same but it is observed in old age as a result of the deposition of hard fat or cholesterol.
The renal artery supplies blood to the kidneys. If there is no supply of blood, then the kidney secretes the hormones rennin and angiotensin in response. Aldosterone secreted from the adrenal gland, along with all the other hormones in the body increases the stiffness of the peripheral arteries and blood pressure increases.
An adrenal disorder can be a cause of hypertension. This type of disorder causes excessive secretion of the hormones aldosterone or catecholamine, which is scientifically termed as hyperaldosteronism and pheochromocytoma. In hyperaldosteronism, retention of sodium and the excretion of potassium occur. This holds water and ultimately leads to hypertension, edema, swelling of tissues and an imbalance of osmolarity of the cell. Catecholamine causes vasoconstriction which gives resistance to flow of blood leading to increase in blood pressure.
After appropriate tests like magnetic resonance imaging, checking the levels of rennin, aldosterone, potassium, sodium, or Doppler tests, the appropriate treatments for the hypertension can be given. Treatment may include angioplasty or angiography. Angioplasty is the mechanical procedure where a balloon catheter is taken to the site of fat deposits; expansion of balloon is completed where the fat deposits are in order to crush them and break them up. This helps increase blood flow without and the hypertension will begin to decrease. Angiography is a tedious job wherein a stent is placed in the renal artery to open the artery and reduce any hypertension that may be experienced.
While these treatments are effective, it is important to understand that these procedures are completed when the hypertension is caused by certain factors. There may be times when simply taking a medication each day can help to decrease it. Medical management can be effective for many people.
четверг, 24 января 2013 г.
What Do the Numbers in My Blood Pressure Reading Mean?
While high blood pressure (BP), or hypertension, can be life-threatening, blood pressure by itself is necessary for life. Indeed, without it, blood would not be able to circulate throughout the body and carry oxygen and nutrients to vital organs. If you are like many people, though, you may have a rough idea of what your blood pressure is, whether it is too high, and so forth. However, when your doctor tells you what your reading is, do you really understand what the numbers mean?
Normal BP will fluctuate slightly throughout the day depending on posture, exercise and sleeping, so it's accurate to say that your BP readings will fall within a range as opposed being constant.
Actual blood pressure is pure physics at work. When the heart beats, blood is pumped through the arteries creating pressure within them. This pressure (BP) is the sum of two forces: The force of the blood being pumped throughout arteries and arterial resistance. Hypertension results when the resultant force, or pressure, becomes excessive.
A typical heart beats between 60 and 80 times a minute under ordinary conditions. Given the above description of how BP is created, it's no surprise that it rises with each beat and falls between beats. Since both the pressure resulting from a heart beat, as well as the pressure of the heart at rest, is important to our understanding of overall health, BP readings include two numbers, expressed as a ratio.
Normal BP is considered to be 120/80mm Hg or less for adults. The higher number in the numerator is the systolic reading and measures the pressure when the heart is beating. The lower number in the denominator is the diastolic reading and measures the pressure when the heart is at rest. Each reading is measured in millimeters of mercury (mm Hg).
Taking a more active role in your health care is always a good idea. Having an understanding of what your blood pressure reading means is one way to do this.