Researchers in Slovenia have suggested that so-called near-death experiences may be explained by elevated levels of carbon dioxide in the blood.

Zalika Klemenc-Ketis and a team of researchers at the University of Maribor in Slovenia examined 52 cardiac arrest patients, who reported near-death experiences that included life flashing before the eyes, feelings of peace and joy and encounters with mystical entities.

Klemenc-Ketis said in a statement, "Several theories explaining the mechanisms of near-death experiences exist. We found that in those patients who experienced the phenomenon, blood carbon dioxide levels were significantly higher than in those who did not."

It was further said by the study said the association of near-death experiences and carbon dioxide has never been reported before and merits further study. (With Inputs from Agencies)