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The aortic valve stretches during ventricular systole, when the left ventricle contracts and ejects blood into the aorta. As the pressure within the ventricle rises, the aortic valve opens to allow blood flow, causing the valve leaflets to stretch outward. This stretching accommodates the surge of blood and helps maintain proper blood flow into the systemic circulation. After systole, the valve closes during diastole to prevent backflow of blood into the ventricle.

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3mo ago

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