IT SOUNDED LIKE AN ALIEN READY TO BURST THROUGH THE CHEST!
Mechanical Heart Parts - Halloween Nightmare of Loudness!
Mechanical heart parts may be the last choice when it comes to a heart upgrade - they are so loud they cause lack of sleep, daytime disruptions, isolation to avoid embarrassment around people, and leads to chronic depression and anxiety.
The alternative is to replace human heart parts with silent running bio parts, either grown in high tech labs, printed, or harvested from animals. The latter bio parts come from animals with life spans of 20 years and can complete a ten year average gap for humans. At EOL, a replacement part is made available.
https://www.medicaldesignandoutsourcing.com/mechanical-heart-valves-loud-insomnia/