The original mechanical valve had issues. Replacing it with the same type of mechanical valve requires the doctor to be even more vigilant.
A notable drawback of mechanical valves is that their compatibility with the human body is not as good as biological valves. The surrounding tissue is prone to hyperplastic tissue affecting the mechanical valve's operation, and causing stenosis again is a headache for doctors.
When the Chief Surgeon removed the previous mechanical valve, typical hyperplastic tissue was indeed discovered.
Reattaching a new mechanical valve to the patient requires careful adjustment of this joint to ideally prevent the same situation from occurring again next time.
The quality of a surgery is reflected in these details, showcasing the doctor's skills.
You can casually fit a valve in, since it can work the same, or you can "meticulously adjust" the connection for a perfect fit.
