From Texas Standard:
In 2001, Jonas Koffler was working for a tech startup in Austin. He was 26 years old, ambitious, and climbing the company ladder by working over 70 hours a week. He'd work around the clock, taking cat naps rather than logging a full night's sleep.
He was happy to do it, too. His hard work, it seemed, was getting results. And then – suddenly – everything stopped. One moment he was giving a presentation; the next, he was in a hospital. He'd had a stroke. The doctors told him that the stress and overexertion from his work may have helped cause it.