January 1, 2009
— Interventional cardiologists created an alternative to open heart
surgery by developing a mitral valve clip. To alleviate mitral valve
regurgitation--a condition where the heart's mitral valve does not close
properly, allowing blood to leak back into the heart--cardiologists
insert a catheter into the patient's groin that travels up into the
mitral valve. The clip is fed through this catheter, where it finally
grasps and tightens the valves' leaflets--effectively preventing blood
from leaking. The clip remains in place while the catheter is removed,
the entire procedure taking approximately two hours and recovery a few
weeks. The procedure is good for those with weaker hearts, when
traditional surgery is more dangerous.
The mitral clip procedure is good for patients who have a weak heart
and may not make it through traditional surgery. The procedure is being
investigated in clinical trials in 38 hospitals across the country.
ABOUT MITRA CLIP: The Mitra Clip is a
device inserted into the heart by a catheter. It is used to gather and
fasten the leaflets of the mitral valve of the heart, which can become
loose enough to allow blood to leak when the valve is closed. Doctors
insert the catheter into the femoral artery, and then work it through
the body to the heart. Using this technique can help patients recover
more quickly from mitral valve repairs.
HAVE A HEART: The heart pumps 5.6 liters of blood through the entire
body in roughly 20 seconds; each day your blood travels some 12,000
miles, and your heart beats about 100,000 times. This delivers oxygen
and other essential nutrients to the body's cells and organs. A heart
attack occurs when the blood supply to the heart muscle is cut off,
either because part of the heart is damaged (such as the valves to the
chambers), or because plaque has built up inside the arteries, narrowing
them and severely restricting blood flow. Symptoms of a heart attack
include a squeezing discomfort in the center of the chest, pain or
tingling in the left arm, shortness of breath and sometimes a cold
sweat, nausea, or dizziness.
ABOUT HEART DISEASE: Most heart diseases arise from hardening of the
arteries, especially from the buildup of fatty material along the inner
lining of the arteries. Coronary arteries supply blood to the heart.
When a blockage occurs, this flow is decreased. Heart medications target
these blockages in several different ways. Nitrates dilate the veins,
decreasing the oxygen requirements of the heart. They also dilate the
coronary arteries to increase blood flow to the heart. Beta-blockers
decrease the heart rate and the force of the heart's contractions.
Aspirin prevents platelets in the blood from clotting and clumping on
blood vessel walls.
Source: ScienceDaily
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