Narrowing of the aortic valve in the heart.
The aortic valve controls blood flow from the left ventricle to the aorta and the rest of the body. It opens when the ventricle contracts and closes when the ventricle relaxes.
My friend Sondra recently ran a 5K race on a very cold morning. So when we got together recently, I asked her how the race went. She told... Read more »
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