What happens to the heart?

When the aortic valve becomes calcified and frozen (stenosis), blood flow is restricted and pressure is increased in the left ventricle of the heart. This increased pressure causes the wall of the left ventricle to thicken, which decreases blood flow and can lead to fatigue, shortness of breath, dizziness, chest pain and heart failure. Once symptomatic and severe, aortic stenosis requires valve replacement.
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