Final answer:
The Bjork-Shiley prosthetic heart valve is associated with a high rate of outlet strut fracture, leading to its eventual removal from the market.
Step-by-step explanation:
The prosthetic heart valve associated with a relatively high rate of outlet strut fracture is the Bjork-Shiley valve. The Bjork-Shiley valve was widely used in the past but is notorious for its association with this complication.
It was made of pyrolytic carbon, which was subject to material fatigue over time, leading to strut fractures in some patients. This issue led to a significant number of patient morbidity and mortality cases, and the valve was eventually removed from the market.