Congestive Heart Failure
The heart is a muscular pump that pumps approximately five
quarts of blood per minute through the body to supply it with oxygen
and energy. The heart’s
work is an incessant job, and one that is generally taken for granted
until it begins to show signs of failure.
The human heart has four chambers, two atria and two ventricles.
It is the left ventricle that is responsible for pumping oxygen
rich blood to the tissues and organs of the body.
When the heart can no longer pump strongly to meet the needs of
his body’s other organs, congestive heart failure may develop.
This can result from narrowed arteries supplying blood to the
heart muscle, prior heart attack resulting in scar tissue that
interferes with the normal work of the heart muscle, high blood
pressure, heart valve disease, as well as viral or bacterial
infections that may weaken the heart.
When the heart pumps ineffectively, it does not empty the
pumping chambers completely, causing an overcrowding of the heart and
lungs, encumbering their normal function.
The heart compensates for this congestion by enlarging and by
inducing itself to pump faster, in an attempt to keep with the
overload. Nearly everyone loses some pumping capacity with aging.
As the condition worsens, the heart eventually fails to
adequately compensate, and this is when the more florid symptoms of
congestive heart failure appear.
The symptoms of congestive heart failure may be mild to severe,
generally resulting in shortness of breath with or without activity,
increased water weight gain of several pounds over 24 to 72 hours,
excessive swelling of the hands, feet, legs, ankles, or even the
abdomen. This may result in increased tiredness with activity, dry
hacking cough, and the need to use several pillows to elevate one’s
head while sleeping. If
you have noticed these symptoms, call your doctor.
Congestive heart failure affects two to three million Americans, and
there are 400,000 new cases diagnosed each year.
More commonly among men than women, and twice as commonly among
African-Americans, compared to Caucasians.
The death rate attributed to heart failure rose 64% from 1970
to 1990, while the death rate from coronary heart disease dropped by
49% during the same period, and this is most likely a reflection of
our nation’s changing population, as people are living longer, and
heart failure increases with age, affecting 5% of people age 75.
The risk factors for congestive heart failure are closely associated
with major risk factors for coronary heart disease:
Smoking, high cholesterol levels, high blood pressure,
diabetes, and obesity. Reducing
or eliminating these risk factors lower the risk of developing heart
disease and heart failure. This
condition is generally diagnosed by the patient’s history and
physical examination, as well as a chest x-ray.
An echocardiogram is useful to evaluate the hearts pumping
ability to measure the degree of failure.
About two thirds of all patient’s with heart failure die
within five years of diagnosis, although
some may live beyond five years and even into old age.
This depends upon the patient’s age, severity of failure,
overall health, and other risk factors.
The best defense against heart failure is prevention of heart
disease, and almost all major risk factors can be controlled or
eliminated, so don’t write yourself a prescription for poor health
or failure. |
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