Heart Failure
Heart
failure occurs when the heart is unable to adequately fill with blood, or is
unable to adequately pump enough blood to meet the body's needs. Many types of
heart conditions can lead to heart failure, including coronary artery disease,
heart valve disease, high blood pressure, congenital heart disease, or cardiac
viral infections. Patients with heart failure often suffer from shortness of
breath, fatigue, and have difficulty exercising. Their life expectancy is often
significantly reduced.
Fortunately,
a lot of progress is being made in reducing symptoms and increasing survival of
patients with heart failure. But, unfortunately, studies show that many doctors
fail to offer adequate treatment to their patients with heart failure. Thus,
patients with heart failure need to make special efforts to educate themselves
about their disease and the available treatments, and to be especially vigilant
in monitoring new breakthroughs in therapy. Here you will find many of the
resources necessary to make sure you're getting the care you need.
How the Heart Works ?
How
the heart's chambers and valves control the flow of blood through the heart,
and how the normal pumping action of the heart supplies the body's needs for
oxygen and nutrients.
Types of Heart Failure
There
are three general varieties of heart failure - dilated cardiomyopathy
(cardiomyopathy is heart muscle disease), hypertrophic cardiomyopathy, and
diastolic heart failure.
Dilated cardiomyopathy
is the most common variety of heart failure. It occurs when the ventricles (the
large pumping chambers of the heart) become weakened, flaccid and dilated. As a
result, the pumping action of the ventricle becomes weak, the amount of blood
pumped with each heart beat drops, and the body's organs may not receive their
full quotient of blood. Dilated cardiomyopathy is the end result of many types
of heart disease, especially coronary artery disease and valvular heart disease.
Hypertrophic
cardiomyopathy is usually a genetic condition, and often runs
in families. It is characterized by a thickening of the heart muscle, resulting
in "stiff" ventricles. The stiffness impairs the filling of the heart
with blood, and can lead to episodes of extreme shortness of breath in some
patients, especially during exercise. The thickening of the heart muscle also
can cause an obstruction in the left ventricle similar to that seen with aortic
stenosis. And some patients with hypertrophic cardiomyopathy have an increased
risk of sudden death.
Diastolic heart failure is similar to hypertrophic
cardiomyopathy in that it is caused by a "stiffening" of the heart
muscle, leading to impaired filling of the heart with blood. But unlike
hypertrophic cardiomyopathy, diastolic heart failure is often not accompanied
by thickening of the heart muscle, and is not thought to be a genetic disorder.
It tends to occur in older individuals, often in women, and often in people
with high blood pressure. It is characterized by relatively sudden episodes of
severe shortness of breath, which is caused by too much fluid in the lungs (a
condition called pulmonary edema).