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eLearning Series:
My Cholesterol Level Is Too High -
What Can I Do?
( 8 pages )
DISCLAIMER: This information is not presented
by a medical practitioner and is for
educational and informational purposes only. The content is
not intended to be a
substitute for professional medical advice, diagnosis, or treatment.
Always seek
the advice of your physician or other qualified health provider
with any questions
you may have regarding a medical condition. Never disregard
professional medical
advice or delay in seeking it because of something you have
read.
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Let's Get Started....
Cholesterol
has been around for thousands of years. It’s a natural function
of the human body. The modern story of cholesterol
and how it affects us today, actually began during a government
study in 1951.
The Pentagon sent
pathologists to Korea to examine the bodies of servicemen
who lost their lives during the
war. Autopsies
were conducted on 2,000 soldiers.
The results were
astounding to the medical community of that time. Normally,
no one under
35 dies of coronary heart disease.
Remember, this was 1951!
More than 75 percent
of the soldiers had yellow deposits of atherosclerotic plaque
on their artery
walls. The average
age of these soldiers was 21 contradicting the assumption
that
such artery clogging deposits were only prevalent in
older men.
The results of
the Army pathologists rocked the medical community. Prior
to these autopsies, doctors had
no idea
how early the
process of heart disease began.
Not long after
this discovery, a name was given to the major contributor
to the
buildup of plaque and
to heart
disease
risk – cholesterol. More recent studies have shown
that for every
1 percent drop in cholesterol levels, there is a
2 percent decrease in the risk of a heart attack.
Since those
original studies, the risk of heart disease stemming from
cholesterol has exploded. In 2002 it
was estimated that
107 million American adults now have a blood cholesterol
level high enough to require medical advice. Unfortunately,
the numbers
keep rising.
Despite this epidemic
problem, there is good news. You can do something about the
problem and
that’s
what this
life guide
is all about. In plain English, we will take
a laymen’s look at
cholesterol, the causes, effects and what you
can do to reverse the negative impact it has on your
personal
health.
WHAT IS CHOLESTROL?
As mentioned above,
cholesterol in and of itself, is a natural function of the
human body. Every living being requires a certain
amount of fat to exist. Like everything in nature, it only
becomes a problem when there is an imbalance.
The processing
of fat begins when it gets absorbed in the intestines.
From there it heads to the liver. The fat requires a delivery
system to the rest of the body to be used immediately but
also
to be stored in fat cells for future use.
In order for the
fat to enter the delivery system, while it is in the liver
it is split into two different types of
fat,
cholesterol and triglycerides.
Once this transformation
takes place, the two types of fat (cholesterol and triglycerides)
are packed into vehicles
for carrying the fat to the fat cells throughout the
body using
the bloodstream. These vehicles
are called lipoproteins.
There
are three types of lipoproteins:
1.
Very Low Density Lipoproteins (VLDL)
2. Low Density Lipoproteins (LDL)
3. High Density Lipoproteins (HDL)
Under normal circumstances,
the bloodstream does a very efficient job of carrying the
LDL and HDL Lipoproteins
throughout the
body.
Cholesterol is
a waxy, fat like substance that presents itself naturally
in cell walls and membranes
everywhere
in your
body. Your body uses cholesterol to produce many
hormones. It also
uses it to produce vitamin D and the bile acids
that help to digest fat.
Where problems
arise is when there is an over abundance of cholesterol in
your
bloodstream.
The cholesterol
deposited by the LDL leads to a narrowing of
the blood vessels.
If this occurs,
the excess can be deposited in the arteries of the heart
which could
result
in stroke
or heart disease.
This is called atherosclerosis. This is why
LDL
is known as “bad cholesterol.”
HDL usually
collects the bad cholesterol and takes it back to the liver.
That’s why
HDL
is known as
“good cholesterol.”
Cholesterol is
not the only cause of heart disease, but it is a contributing
factor.
Here’s how it
works.
Cholesterol can
only attach to the inner lining of the artery if it has been
damaged.
Once the lining
of the artery is damaged, white blood cells rush to the site
followed by cholesterol,
calcium
and cellular
debris. The muscle cells around the
artery are altered and also accumulate cholesterol.
The
fatty streaks in the arteries continue to develop and bulge
into the arteries.
This cholesterol
“bulge”
is then
covered
by a scar that produces a hard
coat or shell over the cholesterol and
cell mixture.
It
is this collection
of cholesterol
that is then covered by a scar
that is called “plaque.”
The buildup of
plaque narrows the space in the arteries through which
blood
can flow,
decreasing
the supply
of oxygen and
nutrients. This cuts down the
supply of blood and oxygen to the tissues
that are fed by that blood vessel.
The elasticity
of the blood vessel is reduced and the arteries’ ability
to
control blood
pressure is compromised.
If there
is not enough oxygen carrying
blood passing through the narrowed
arteries,
the heart
may give you
a
pain that
is called angina.
The pain usually
happens when you exercise because at that
time your
heart requires
more oxygen.
Usually it
is felt
in the chest or the left
arm and shoulder, although it can
happen
without any symptoms at all.
Plaque
can vary in size as well as shape. All through
the coronary
arteries
you
can find
many small plaques
that
cover less than
half of an artery opening.
Some of these plaques are
completely invisible
in the
tests that
doctors use
to identify heart
disease.
The medical community
used to think that the primary
concern was the
larger plaques.
They
thought these
posed a greater
threat because of their
size and that they were
more likely
to cause
a complete
blockage
of the
coronary
arteries.
While it is
true that the larger plaques are
more
likely to
cause angina, it
is the smaller
plaques
that are
packed with
cholesterol and covered
by scars that are more
dangerous.
They
are considered
unstable
and
prone to ruptures
or bursting releasing
their load of cholesterol
into the bloodstream.
This causes
immediate clotting
within the artery. If the
blood clot
blocks the artery totally,
it will stop the blood
flow and
a heart
attack occurs.
The
muscle on the farther side of the occurring
clot fails
to get
the oxygen
it needs and
begins to die.
This kind
of damage
can be permanent.
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