
Defibrillator installed on Everest by Oxted man saves climber

Lost in Shangri-La: A True Story of Survival, Adventure, and the Most Incredible Rescue Mission of World War II
amazon.com

Then Breashears offered his expedition’s supply of oxygen—fifty canisters that had been laboriously carried to 26,000 feet—to the ailing climbers and would-be rescuers on the Col. Even though this threatened to put his $5.5 million film project in jeopardy, he made the crucial gas available without hesitation.