Heart failure can be caused by either diminished force
of contraction of each heartbeat (systolic heart failure) or inability of the
heart to fully relax and fill up with blood between heartbeats (diastolic heart
failure). Most people with heart failure have systolic heart failure. However,
many have a combination of systolic and diastolic heart failure. Your doctor
will take into account whether you have systolic heart failure, diastolic heart
failure, or both in deciding which types of medicines to use.
The three main classes of medicines for systolic heart failure
are:
- Diuretics.
- Angiotensin-converting
enzyme (ACE) inhibitors.
- Beta-blockers.
If you have systolic heart failure, your doctor will aim to treat
you with all three of these medicines. The combination of medicines will remove
excess fluid from your body (diuretics), improve the efficiency of your heart
in pumping blood (ACE inhibitors and beta-blockers), and reduce ongoing damage
to your heart.
If you continue to have symptoms after taking medicines from each of
these classes, or if you are not able to tolerate any of them, your doctor
might consider treating you with other medicines that increase the force of
contraction of the heart (digoxin) or with vasodilators, which can lower the
blood pressure your heart has to beat against.
If you are very seriously ill from systolic heart failure, your
doctor may need to admit you to an intensive care unit to receive intravenous
medicine such as dobutamine to help increase the force of your heart's
contractions.