A research has revealed that near death experiences may be linked to high levels of carbon dioxide in the body.

The study was carried out by Slovenian researchers and the results of the study have been published in the Biomed Central Journal, Critical Care.

The study took into account 52 patients who were resuscitated after a heart attack.

The study revealed that approximately one in five patients (11 patients) reported that they had an unusual experience such as a feeling of peace and joy or experienced supernatural encounters.

It was seen that these patients had a higher concentration of CO2 in their breath and arteries. Researchers believe that this could be a probable physiological reason for the sensations.

It is reported that improvements in cardiac resuscitation techniques has also led to an increase in the number of reported near-death experiences (NDEs).

Some survivors hold the belief that that their experiences are proof of life after death.

There have been many theories that have been associated with near death experiences. However, this is the first time that high levels of CO2 have been linked to NDEs.

Zalika Klemenc-Ketis, who led the team from the University of Maribor, says, “We found that in those patients who experienced the phenomenon, blood carbon dioxide levels were significantly higher than in those who did not”.