Emergency personnel found the 43-year-old physical therapist dead inside the chamber at his Arizona health clinic, which offered oxygen therapy.

Walter Foxcroft, 43, was found dead inside a hyperbaric chamber at the Arizona facility he co-founded last year.

One man is dead after fire inside a hyperbaric chamber in Lake Havasu City, Ariz. It's the second such fatality in the United States this year. The 43-year-old died after the "flash fire" earlier this week,