van Lommel et al. (2001)

Near-death experience in survivors of cardiac arrest: a prospective study in the Netherlands

Article Analysis — AI-characterized, source-grounded

Contents

• Provenance
• What this document is
• How the study was run
• Reported results
• What the document itself concludes
• Document-integrity notes
• References cited in the document

Provenance

• Authors as printed: Pim van Lommel, Ruud van Wees, Vincent Meyers, Ingrid Elfferich. Affiliations printed: Division of Cardiology, Hospital Rijnstate, Arnhem, Netherlands (P van Lommel MD); Tilburg, Netherlands (R van Wees PhD); Nijmegen, Netherlands (V Meyers PhD); and Capelle a/d Ijssel, Netherlands (I Elfferich PhD).
• The stored text appears to be an extraction from the published journal pages (THE LANCET • Vol 358 • December 15, 2001, pages 2039–45), including running page headers, a “For personal use” notice repeated per page, and a pointer “See Commentary page 2010.”
• Bibliographic record: The Lancet, 2001; the text’s own citation line reads “Lancet 2001; 358: 2039–45.”
• read the complete extracted text

What this document is

This is a prospective clinical research article on near-death experience (NDE) in survivors of cardiac arrest, paired with a longitudinal follow-up study of life changes after NDE. The authors frame the question as one of cause and correlates: they “aimed to establish the cause of this experience and assess factors that affected its frequency, depth, and content.” They note that prior studies of NDE had been retrospective and highly selective, with 5–10 years sometimes elapsing between the experience and its investigation, and with frequency estimates ranging from 4·3% in a random German sample to 85% in children — divergences the authors attribute to varying definitions and inadequate research methods.

The stakes, as the paper frames them, are theoretical: if a purely physiological mechanism such as cerebral anoxia caused NDE, then most patients who have been clinically dead should report one. The prospective design — enrolling all consecutive resuscitated cardiac patients, with medical data recorded near the time of the event — is presented as the way to test physiological, pharmacological, and psychological explanations against actual frequencies.

How the study was run

The study included 344 consecutive cardiac patients successfully resuscitated after cardiac arrest in ten Dutch hospitals, over research periods varying by hospital from 4 months to nearly 4 years (1988–92). Hospitals that failed the requirement of including all consecutive successfully resuscitated patients were dropped from the research. All patients were established as having been clinically dead, mainly by electrocardiogram records; written informed consent and ethics committee approval were obtained.

NDE was defined as “the reported memory of all impressions during a special state of consciousness,” including elements such as out-of-body experience, pleasant feelings, and seeing a tunnel, a light, deceased relatives, or a life review. Sufficiently well patients were given a short standardized interview within a few days of resuscitation; three researchers coded experiences with the weighted core experience index (WCEI), where scores 1–5 denote superficial NDE, 6 or more a core experience, and 10 or greater a deep experience. Demographic, medical (including duration of circulatory arrest and unconsciousness, intubation, number of CPRs), pharmacological, and psychological data were recorded, with memory problems assessed after lengthy or difficult resuscitation.

The longitudinal arm used standardized taped interviews a mean of 2 years after CPR, with a 34-item life-change inventory scored on a five-point scale, and again at 8 years, when surviving patients and their partners also completed a Dutch Heart Foundation questionnaire, the Utrecht coping list, the sense of coherence inquiry, and a depression scale. Controls were resuscitated patients without NDE, matched by age, sex, and time interval since CPR. Statistical methods included the Pearson chi-square test and t test for frequency factors, Mann-Whitney and Spearman’s rank correlation for depth factors; all tests were two-tailed with significance at p values less than 0·05.

Reported results

The 344 patients underwent 509 successful resuscitations; mean age at resuscitation was 62·2 years (SD 12·2), range 26 to 92; 251 (73%) were men and 93 (27%) women. The headline distribution across WCEI classes (Table 1 of the paper):

Thus 62 patients (18%) reported NDE, 41 (12%) a core experience, and 23 (7% of total) a deep or very deep NDE; per resuscitation, 12% resulted in NDE and 8% in core experiences. No patients reported distressing or frightening NDE. The most frequent elements among the 62 experiencers were positive emotions (35, 56%) and awareness of being dead (31, 50%); life review (8, 13%) and presence of a border (5, 8%) were least frequent.

Key associations reported in the paper’s Table 3:

Duration of cardiac arrest, duration of unconsciousness, intubation, medication, religion, education, and foreknowledge of NDE showed no significant relation to frequency. The paper also reproduces, verbatim from a coronary-care-unit nurse in the pilot phase, an anecdote of a resuscitated comatose patient who later correctly identified where the nurse had placed his removed dentures and described the resuscitation room and staff, framed as “a veridical out-of-body experience of a resuscitated patient.”

Longitudinally, 37 NDE patients were re-interviewed at 2 years (19 of the 62 had died; six refused); after adjudication, 35 patients with affirmed NDE were compared with 39 without. Significant differences appeared in 13 of 34 life-change items, including belief in life after death (p=0·007), fear of death (p=0·009), and appreciation of ordinary things (p=0·0001). At 8-year follow-up (23 NDE, 15 non-NDE patients), all patients had become more self-assured, socially aware, and religious, but the paper reports contrasts: most non-NDE patients did not believe in a life after death, and their interest in spirituality had strongly decreased (summed scores of –84 at 2 years, –41 at 8 years, versus 15 and 2 in the NDE group), while NDE patients showed no fear of death and stronger afterlife belief. Patients could recall their NDE almost exactly at 2 and 8 years.

What the document itself concludes

The authors conclude that “medical factors cannot account for occurrence of NDE,” since all patients had been clinically dead yet most did not have the experience, and that neither seriousness of the crisis, medication, nor fear before arrest was associated with occurrence. They argue that if cerebral anoxia alone caused NDE, most patients should have had one. They estimate — after comparing with one hospital reporting only 8% and with a prospective study by Parnia and colleagues — that the “true frequency of the experience is likely to be about 10%,” or 5% per resuscitation, and repeatedly identify age as an important factor (“although age plays a part”).

They further argue that induced experiences (from temporal-lobe stimulation, hypercarbia, hypoxia in fighter pilots, ketamine, LSD, and related agents) “are not identical to NDE,” lacking the panoramic life review and lasting transformation; that an “unknown mechanism” triggers NDE at a subcellular level in only a few cases; and that the “never proven, concept that consciousness and memories are localised in the brain should be discussed,” asking how clear consciousness could be experienced during a flat EEG. They present transcendence — consciousness functioning independently of the body — as a theory to be included in an explanatory framework. Stated limitations include the older, all-Dutch cardiac sample, possible patient selection at short-participating hospitals, and the near-impossibility of rigorous prospective study for other near-death causes. They call for research focused on “out-of-body experiences and other verifiable aspects.”

Document-integrity notes

• The extraction carries per-page boilerplate (“For personal use. Only reproduce with permission from The Lancet Publishing Group.”) and running headers interleaved with the article text.
• OCR/encoding artifacts are frequent: the chi-square symbol is rendered as “/H9273 2”, decimal points are spaced (e.g., “0 ·05”, “62 ·2”), and words are occasionally split (“un- consciousness”, “opiod” for what is presumably “opioid”, “wih NDE” in a Table 4 footnote, “LIfe-change” in a table heading).
• The paper’s tables (1–5) survived extraction but with alignment lost; column values in Tables 3 and 5 run together and require careful reading against the printed footnotes.
• An unrelated one-page item (“Clinical picture: Amiodarone-induced pulmonary mass and cutaneous vasculitis” by Christoph Scharf and colleagues) is appended at the end of the stored text and is not part of this article.
• Minor internal wording inconsistencies exist, e.g., “36% (123) of all patients were unconsciousness for longer than 60 min,” and fentanyl is described as “a synthetic opiod antagonist” as printed.

References cited in the document

The article carries a numbered reference list of 31 entries. Per site policy for long lists it is not reproduced here; entries discussed in the analysis above include Ring’s Life at death (1980, ref 1), Sabom’s Recollections of death (1982, ref 8) and Light and death (1998, ref 22), Morse (ref 10), Greyson (refs 7, 12, 20, 27), Schmied and colleagues on the German sample (ref 11), Parnia and colleagues’ prospective study in Resuscitation (2001, ref 17), Dickey and Adgey on post-resuscitation mortality (ref 18), and Ring and Cooper’s Mindsight on the blind (ref 31). The full list is available in the linked complete text.