AARP Hearing Center
I have spent my life in the presence of the heart: its rhythm, its resilience and, inevitably, its silence. As a cardiologist, my work has always been about delaying that silence for as long as possible.
But as I’ve grown older alongside my patients, I’ve found myself confronting a question that medicine doesn’t like to answer: What if the end doesn’t have to be final?
For many people, the answer lies in faith. I was raised Catholic, and for much of my life, I assumed there was something beyond this one. Over time, though, through years of medical practice and reflection, I found myself less certain.
What I do know is this: The “you” that thinks, remembers and experiences the world depends on the brain. When the brain is gone, everything that makes you you appears to go with it.
That realization led me somewhere unexpected.
Fifteen years ago, I made a decision that surprises almost everyone I tell: When I die, I plan to be cryogenically preserved.
What being cryogenically preserved actually means
Cryonics is often misunderstood as simply “freezing” a body. In reality, freezing is exactly what scientists try to avoid.
Instead, the goal is something called vitrification, a process that replaces blood with a medical-grade solution and cools the body to extremely low temperatures without forming damaging ice crystals. At around -196°C, in liquid nitrogen, biological activity effectively stops.
This isn’t science fiction. Variations of this process are already used to preserve embryos and reproductive cells. In recent years, researchers have even successfully preserved and transplanted vitrified organs, such as kidneys, in animal models after rewarming them.
But here’s the part that matters most: No one has ever brought a human being back.
And we are not close.
The hard truth about cryogenics
As a physician, I’m very aware of the gap between possibility and reality.
Preserving a structure, like a kidney or even a brain, is one challenge. Restoring it to full function is another entirely. The human brain, in particular, presents a profound problem. It isn’t just tissue; it’s memory, identity, personality — the “software” of who we are.
Some experimental techniques can preserve the brain’s structure with remarkable detail. But the same processes can destroy the biological activity needed for life. In simple terms, we may be able to preserve a brain the way we preserve a photograph — but not restart it.
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