Near-Death Experiences: Personal Accounts and What Science Can Explain

Near-death experiences, often called NDEs, remain one of the most discussed and least fully understood subjects at the intersection of medicine, psychology, and personal belief. Some people who survive cardiac arrest, severe trauma, coma, or other life-threatening medical events later report unusually vivid memories. These accounts can include a sensation of leaving the body, moving through darkness or light, feeling profound calm, encountering familiar people, or reviewing important moments from life.

For the people who describe them, these experiences can feel completely real and may lead to lasting changes in priorities, relationships, spirituality, or attitudes toward death. For scientists, however, NDEs are difficult to study because they occur during medical emergencies, memories can be shaped during recovery, and brain activity around loss and restoration of consciousness is complex.

Current research does not establish that near-death experiences provide evidence of life after death, predict future events, or reveal information beyond ordinary perception. At the same time, researchers acknowledge that the reports are psychologically significant and deserve respectful, careful study. Understanding them may help clinicians support survivors of cardiac arrest and other critical illnesses.

A Reported Experience During Medical Testing

One account circulated in media coverage involves Angela Harris, who has spoken publicly about an episode during a tilt-table test in 2015. Tilt-table testing is used by clinicians to investigate unexplained fainting, dizziness, and suspected problems with blood-pressure regulation or the autonomic nervous system. During the procedure, a patient is secured to a table that changes position while medical staff monitor heart rate, blood pressure, and symptoms.

According to Harris’s own description, she experienced a period of medical instability during the test and later recalled feeling as though she had separated from her body. She said she perceived the medical room from above and described what she called “360-degree vision.” She has also said that she felt calm rather than frightened, despite the seriousness of the situation.

Such reports are important to distinguish from independently verified observations. A person’s recollection of an out-of-body perspective can be deeply meaningful and subjectively convincing, but it does not by itself demonstrate that consciousness literally left the body. Researchers examining NDEs generally approach these accounts as first-person experiences that require both empathy and scientific caution.

The “Void,” Guides, and Life Review Themes

Harris has described entering a peaceful, dark space that she characterized as a “black velvety void.” In her account, she encountered a comforting guide and felt connected to deceased relatives. She also described a life review, a theme commonly reported in near-death narratives. People who describe life reviews may say they experienced memories, emotions, or a heightened sense of how their actions affected others.

These themes are not universal. Some survivors report bright lights, tunnels, voices, or reunions with loved ones; others recall only confusion, fragmented impressions, or no experience at all. A smaller number report distressing sensations. The diversity of accounts is one reason scientists are cautious about proposing one explanation that applies to everyone.

In personal and spiritual interpretations, encounters with guides or relatives may be understood as meaningful contact with another reality. In neuroscience and psychology, they may be considered experiences generated or shaped by memory, expectation, emotional needs, medication effects, sensory changes, and altered brain function during a crisis. These possibilities are not always mutually exclusive in the way individuals make meaning of a difficult event, but scientific claims require evidence that can be independently tested.

Claims About the Future Require Careful Context

Harris has also said that she saw a future affected by war, population decline, and a breakdown of modern society. Accounts of visions or premonitions can understandably attract public attention, particularly during periods of international conflict and uncertainty. Yet there is no reliable scientific evidence that near-death experiences can predict future events.

Warnings about war, social instability, and human suffering should therefore be treated as personal interpretations rather than factual forecasts. Global conflicts have devastating consequences for civilians, public health, economies, and communities, and preventing violence remains an urgent international goal. But responsible discussion should avoid presenting an individual’s medical or spiritual experience as proof that a particular future is inevitable.

Experts in memory research note that recollections can evolve over time as people reflect on powerful events, share their stories, and seek language for experiences that are difficult to describe. This does not mean a person is being dishonest. Rather, human memory is reconstructive, especially after trauma, sedation, unconsciousness, or intense emotional stress.

Another Survivor’s Account of Coma and Recovery

Another personal account described in media reports concerns Tom Kearney, who was seriously injured in a road collision and spent time in a coma. He later said that he had vivid dreams or visions involving deceased relatives and that he heard messages encouraging him to return to his family.

Experiences during coma and intensive care can be emotionally powerful. Patients may have dreams, hallucinations, fragments of awareness, or memories influenced by sounds and conversations around them. Research on intensive-care survivors has shown that delirium, sedation, sleep disruption, pain, infection, and critical illness can all affect perception and memory. Some patients later report unusually realistic dreams that blend hospital stimuli with personal memories.

Healthcare professionals increasingly recognize the importance of listening to these accounts without dismissing patients. Survivors may need support as they process what happened, particularly if the experience leaves them anxious, confused, grieving, or unable to discuss it with family members. Others may find their experiences reassuring and may wish to integrate them into their personal beliefs.

What Happens in the Brain During a Medical Crisis?

Scientists are still investigating the biological processes that may contribute to near-death experiences. One major area of study involves reduced blood flow and oxygen supply to the brain. During cardiac arrest, circulation stops or becomes severely impaired. Without rapid treatment, brain function is affected within seconds. Cardiopulmonary resuscitation, defibrillation when appropriate, and advanced emergency care are essential to restoring circulation and improving survival.

Reduced oxygen availability, known as hypoxia, may contribute to altered perception, visual phenomena, confusion, and feelings of detachment. Changes in carbon dioxide levels can also affect consciousness. In addition, the brain’s response to severe stress may involve changes in several signaling systems, including neurotransmitters related to arousal, pain, emotion, and sensory processing.

Researchers have considered potential roles for serotonin, dopamine, noradrenaline, glutamate, gamma-aminobutyric acid (GABA), and endorphin-related systems. These substances help regulate functions such as mood, attention, fear, wakefulness, pain response, and perception. However, it is important not to overstate the evidence: scientists have not identified one chemical or one brain region that fully explains every reported NDE feature.

Dr. Charlotte Martial, a researcher who has studied near-death experiences and altered states of consciousness, has discussed hypoxia as a possible starting point in a broader cascade of neurochemical and physiological changes. Her work reflects a wider scientific effort to identify why some people report intense peace, unusual visual imagery, dissociation, or a sense of expanded awareness during a life-threatening event.

Why Near-Death Experiences Can Feel So Real

Vividness is one of the defining characteristics of many NDE reports. People often say the experience seemed more real than an ordinary dream. This quality may be linked to strong emotional activation and the way memory is encoded during extreme events. Memories associated with fear, relief, loss, love, or survival can remain exceptionally clear, even when some factual details are incomplete or uncertain.

Several established phenomena may overlap with elements often described in NDEs. For example, out-of-body sensations have been studied in neurological conditions and in laboratory settings involving disruptions in the brain’s integration of visual, balance, and body-position information. Tunnel-like vision can occur when blood flow or oxygen delivery is reduced. Sleep-related experiences, including lucid dreaming and sleep paralysis, can also involve vivid imagery, a sensed presence, or a feeling of separation from the body.

These comparisons do not settle the larger philosophical questions raised by NDEs. They do show that the human brain can produce compelling changes in self-perception under a range of conditions. The scientific challenge is to determine which mechanisms are involved in individual cases and how they interact with culture, beliefs, prior experiences, and medical circumstances.

Research on Consciousness After Cardiac Arrest

Studies of cardiac arrest survivors have sought to document memories and awareness reported after resuscitation. One of the best-known lines of research is led by Dr. Sam Parnia and colleagues, who have examined consciousness and recalled experiences in people who survived cardiac arrest. These studies have found that a minority of survivors report memories or perceptions from the period surrounding resuscitation, but collecting precise data is difficult because many patients do not survive, cannot be interviewed, or have no recall.

Some studies have also measured electrical activity in the brain near death or during the return of circulation. Findings suggest that the dying brain may sometimes show brief, organized patterns of activity. However, these observations are early and cannot yet explain the content, timing, or meaning of subjective experiences. Brain activity does not prove or disprove spiritual interpretations; it provides one avenue for investigating the physical processes associated with consciousness.

Researchers stress the need for larger, carefully designed studies that include detailed medical records, standardized interviews, and transparent methods. In a field shaped by profound personal beliefs, rigorous research is especially important.

How Families and Clinicians Can Respond Respectfully

When someone shares a near-death experience, the most helpful initial response is often to listen. A survivor may not be asking others to accept every interpretation as fact. They may simply need space to describe an event that changed how they see their life. Family members can ask open questions, avoid ridicule, and acknowledge the emotions involved.

For clinicians, respectful communication is part of patient-centered care. If an experience is causing ongoing distress, nightmares, depression, anxiety, or difficulty returning to daily life, referral to a qualified mental-health professional may be appropriate. Survivors of cardiac arrest and critical illness may also benefit from rehabilitation and follow-up care addressing cognitive, emotional, and physical recovery.

Anyone experiencing fainting, chest pain, palpitations, severe dizziness, or loss of consciousness should seek medical assessment promptly. These symptoms can have many causes, including heart rhythm disorders, blood-pressure problems, neurological conditions, dehydration, medication effects, and metabolic issues. A personal account of an altered state should never replace emergency care or medical advice.

Why the Subject Continues to Matter

Near-death experiences raise enduring questions about consciousness, memory, identity, and mortality. Personal stories such as those shared by Angela Harris and Tom Kearney may be meaningful to the individuals involved and to audiences seeking comfort or reflection. They should nevertheless be presented with clear boundaries between personal testimony, spiritual belief, and scientific evidence.

The available evidence supports the view that medical crises can produce profound altered states of consciousness. It also shows that researchers do not yet have a complete explanation for every feature reported by survivors. The most responsible approach is neither automatic dismissal nor uncritical acceptance. It is to listen compassionately, evaluate claims carefully, and continue supporting high-quality research into the brain, resuscitation, and human experience.

Sources

• BBC: Research and discussion on near-death experiences
• Reuters: International reporting on health, science, and global affairs
• American Heart Association: Cardiac arrest information
• NHS: Information about fainting and when to seek medical help
• National Center for Biotechnology Information: Scientific review of near-death experiences
• World Health Organization: Mental health support and care