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20 minutes is about one-eight-thousandth as long as The First artificial heart patient's survival.
In other words, it's 0.000124 times the length of The First artificial heart patient's survival, and the length of The First artificial heart patient's survival is 8,060 times that amount.
(1982) (Dr. Barney Bailey Clark; first permanent, pneumatic device)
On December 2nd, 1982 Dr. William DeVries implanted the first artificial heart into Dr. Barney Bailey Clark, who went on to live for 161,000 minutes. This early model of the artificial heart was controlled and powered by an external, 146.51 kg (323 lb) machine that Dr. Clark had to cart with him as he moved throughout the hospital.
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