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High Blood Pressure - Silent but Deadly!
High blood pressure (hypertension) is one of the most
common diseases, affecting a large percentage of the adult population, in western societies.
This "silent killer" increases your risk of developing kidney failure, vision loss, congestive heart failure, heart attack, stroke, and other problems.
Because it exhibits little or no symptoms, almost one third of
those with high blood pressure don't realize they have it. It is the utter lack of pain or any other warning signs that makes mild to moderate hypertension so inconspicuous, but deadly.
Many people with this disease may not even know it, since it displays little or no symptoms, especially in the early stages... hence the reason it is commonly referred to as "the silent killer". It can wreak its destructive effects for 10 to 20 years before its effects are first noticed. Since you
cannot feel, hear, taste, or see the signs of hypertension, you can easily ignore it.
High blood pressure affects one in every four adults in developed western societies, and almost 30% of those people don't even know they have it.
Even worst, of the 70% who know they have this disease, almost 40% are being inadequately treated, and another 20% are receiving no treatment at all.
These staggering numbers indicate that a large percentage of our populations are at risk of developing life threatening conditions, such as kidney disease, heart disease, and stroke... leading to unhealthy, unhappy lives and premature death.
What Exactly Is Hypertension?
Blood pressure is the force that the blood exerts against a vessel wall. Pressure is often measured by observing how high it can push a column of mercury [Hg] up an evacuated tube called a sphygmomanometer. It is normally measured at the
brachial artery of the arm (usually left arm). This artery is sufficiently close to the heart to reflect the maximum arterial blood pressure found anywhere in the systemic circuit.
Two pressures are recorded: systolic pressure and diastolic
pressure. Systolic pressure is the peak arterial blood pressure attained
when the heart beats, and diastolic pressure is the minimum blood pressure
between heartbeats. Because pressures are compared to the force generated by a
column of mercury, they are expressed in terms of millimeters of mercury [mmHg].
For a healthy person the systolic and diastolic pressures are typically about
120 and 75 mmHg, respectively. Arterial blood pressure is written as a ratio of
systolic over diastolic pressure. So, the blood pressure of a healthy person is
written as 120/75.
Hypertension is commonly considered to be a chronic
resting blood pressure higher than 140/90. Transient high blood pressure
resulting from emotion or exercise is not hypertension.
High blood pressure is a major cause of heart failure, stroke, and kidney
failure. In fact it is both a cause and symptom of kidney failure. The kidneys
play an important role in regulating blood pressure, by regulating the
concentration and volume of the blood. When the kidneys are not able to perform
this essential function, it usually results in elevated blood pressure... thus it is
a symptom of kidney failure.
When blood pressure is constantly elevated, this places a lot of stress on the kidneys'
arterioles (small arteries). They thicken in response to the stress, their
passage-way (lumens) become smaller and blood flow declines. When the kidneys
detect a decline in blood flow, they release renin (an enzyme secreted by the
kidneys which activates hormonal mechanisms that controls blood pressure and
electrolyte balance). This reaction by the kidneys causes blood pressure to
increase, thus contributing to hypertension.
Most cases of hypertension result from lifestyle, dietary, hereditary
factors, and other factors. In these cases, however, it is difficult to pinpoint
the specific underlying cause(s). These cases are known as primary
hypertension and accounts for approximately 90% of all cases. In former
years, it was considered to be a normal part of aging and was (and continues to
be) called essential hypertension.
This may seem to suggest that it is normal and cannot be avoided, but this is
not necessarily so. Having an understanding of the primary causes of high blood
pressure can help in formulation of effective preventative strategies.
Treatments for primary hypertension include weight loss, diet, exercise, natural and homeopathic products, and
certain prescription drugs. Within recent years, the trend has been to use
more alternative and natural treatments, rather than prescription drugs.
Some of these natural and alternative products have been quite successful,
without the side effects of traditional prescription drugs. In some cases,
however, both alternative and traditional treatments may be required, to
effectively lower blood pressure.
Secondary hypertension is high blood pressure that is caused by another
medical condition, and accounts for approximately 10% of cases. Examples
of identifiable disorders that can cause high blood pressure include:
- atherosclerosis - degenerative disease of the arteries associated
with fatty deposits on the inner walls, leading to reduced blood flow... and
high blood pressure,
- hyperthyroidism - excessive activity of the thyroid gland. This can
be caused by increased growth of the thyroid gland or the presence of tumors,
- Cushing syndrome - a metabolic disorder that results from excessive
amounts of corticosteroids in the body because of the inability to regulate
cortisol. The commonest cause is tumor of the pituitary gland or a malignancy
elsewhere, e.g. in the lung or adrenal gland. Symptoms include obesity,
reddening of face and neck, growth of facial hair, osteoporosis, high blood
pressure, and possible mental disturbances.
- Polycythemia - a condition in which there is an increase in the
total number of red blood cells in the body. The overproduction of red blood
cells may be caused by a primary process in the bone marrow, chronically low
oxygen levels, or malignancy.
Secondary hypertension is corrected by treating the underlying causes.
The Dangers of Uncontrolled High Blood Pressure
The effects of high blood pressure on the tissues and organs of
the body, can be severe and dangerous. Tens of millions of people are
walking around with uncontrolled high blood pressure. Over time, this
silent killer weakens their arteries, stresses their hearts, corrodes arteries
in their brains, threatens their eyesight, and eats away at their kidneys.
The excess force generated by the constant high pressure of the blood against
blood vessel walls can damage their all-important lining (the inner lining of
arteries is called the endothelium). Damage to the endothelium
speeds up the hardening of the arteries.
Hardening of the arteries, known as atherosclerosis,
is a condition that affects us all as we grow older. High blood pressure,
however, speeds up this process considerably. These stiffened, narrow
arteries have a hard time supplying the body with enough oxygen and nutrients,
which means the tissues and organs that they serve can be damaged. If the
arteries in your eye are affected, your vision may suffer; if the arteries in
your kidneys are damaged, you may develop kidney disease or kidney failure; if
the arteries in your heart are damaged, you could develop blockages that can
cause a heart attack; and if arteries in your brain are affected, you may form
blockages that can trigger a stroke.
Hypertension, whether primary or secondary is a serious health condition and
should not be taken for granted. It is a major cause of strokes, heart failure
and kidney failure. Your best defense against high blood pressure is to prevent
it, by minimizing and avoiding the risk factors and causes, and treating any underlying
condition which may cause it. Most importantly, eat a balanced diet, drink
adequate amounts of water, exercise, reduce stress levels, and avoid destructive
habits such as smoking.
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