Key points from article :
9 years ago 25-year-old Stan Larkin suddenly collapsed with undiagnosed arrhythmogenic dysplasia.
Eventually progressed to heart failure and cardiogenic shock.
His heart was removed and replaced with SynCardia artificial heart with chambers and four valves.
Backpack contains Freedom Driver that powered the artificial heart delivering pumps of compressed air.
Many patients waiting for a transplant have hearts that are so weak, the kidneys, liver and other critical organs fail.
