In January 2024, a thunderclap headache in Los Angeles — 3,000 miles from home — sent John Duffield, a 43-year-old healthcare marketing executive and former triathlete, to the hospital with a brain bleed.
He’s a Southport resident; his children went to Christ & Holy Trinity Preschool, where his wife Janet teaches.
Within 6 months John went from “the healthiest person I knew, to a man recording goodbye videos for my wife and children, set to send automatically. Just in case.”
John spent his career helping global brands innovate, most recently with artificial intelligence. When his life came apart, he used those tools to survive.
“What it did astonished me,” he says.
“It answered at 2 a.m. when the fear was loudest, and covered the hours no clinician could. I was living inside a preview of what care will look like for all of us.”
The workup uncovered a heart defect he had been born with: a bicuspid aortic valve, a severe leak, and an aortic aneurysm.
John Duffield
Six months later, a valve-sparing procedure, repairing John’s own valve instead of replacing it. Twenty days later, a leaking mitral valve put him back on the operating table for a second open-heart surgery.
What followed was 43 nights across 3 health systems: atrial fibrillation and a cardioversion, fluid drained from his lungs 4 times, a staph infection in his chest incision, a debridement, and 6 weeks on a wound vac.
Janet slept on fold-out benches and recliners, tracked every medication, and caught errors in his transfer paperwork. She was his caregiving lifeline.
John used AI to decode reports, prepare questions for his doctors, weigh whether to risk a 3rd open-heart surgery, and explain his condition to his children. He filmed it all as it happened.
Recovery brought discoveries of its own. AI surfaced a possible link between his brain bleed and his heart disease. Genetic testing at Yale found an inherited variant associated with elevated cardiovascular and cerebrovascular risk.
In June 2025, a dangerously slow heart rhythm caught on stage in Chicago led to a pacemaker.
Now, John is releasing “The Future Patient.” It tells the full story, with a foreword by his surgeon, nd dozens of QR-linked videos recorded from the ICU bed to the hospital rooftop.
The book’s launch takes place in New York City tonight (Tuesday), 5:30 p.m.), near Grand Central. It includes fellow heart patients and colleagues from health, life sciences, advertising and technology. The conversation will focus on where patient care is heading, and how to make the patient experience clearer for everyone who comes after us. Click here for details.
(To order “The Future Patient,” and for more information, click here.)
(“06880” often profiles the remarkable lives of local residents. If you enjoy stories like this, please click here to support our work. Thank you!)
Thanks, Dan and as I always tell my elders or Anyone going into the hospital nursing home, and or assisted living, you need an advocate in combination of his knowledge and all the advancement in our medical Technology and society And his advocate he lived. God bless ❤️🧡💜💙🩵🙏🏼🙏🏽🙏🏼