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What Is Severe Aortic Stenosis?

The average thickness of the aortic valve is only 0.3 mm. Yet the aortic valve will be opened and closed nearly 2 billion times in a person's lifetime, consequently aortic valve is likely to deteriorate. Additionally, bacterial infection, aging and various other factors could also threaten the health of aortic valve, resulting in valve stenosis.

 

When aortic valve stenosis occurs, the valve becomes hard, inflexible, and cannot be fully opened and closed, the natural pumping mechanism of blood is affected, resulting in insufficient blood output. The heart also has to increase its power just to pump out the same amount of blood. Over time, this long-term "overworked" state will permanently damage the heart muscle, causing heart failure. Heart failure could seriously affect patient’s daily activities, even lead to death.

  • 0.3mm

    Mean thickness of the aortic valve

  • 20billion times

    Opening and closing times of the aortic valve


What Is Severe Aortic Stenosis?
Clinical Solutions
Minimally Invasive Option for Severe Aortic Stenosis: TAVI

During TAVI, the bioprosthetic valve is fully folded into the catheter, which then passes through the aorta into the heart.


Common approaches for TAVI are transapical , transfemoral artery, transsubclavian artery, and transascending aorta.


Through the imaging and delivery system, the physician delivers the catheter to the diseased valve, then gradually release the valve through the automatic handle after positioning. Figure 2 shows the valve in release. When the valve is completely released, the biological valve fully unfolds in the diseased valve, and replaces the function of the original valve in the patient's body.



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