简介：Thestudydealswiththeobservationofthechangesintheelectricalactivitiesof8healthydiversinthe80mswsaturation-100mswexcursionhelioxdivebyDCG.Resultsshowedsignificantchangesinthe24hofaverageheartrate,thedecreaseofheartrateatsaturationstoragedepthanddecompressionperiodsbeing15.5%and19.7%respectively.Fortuitoussupraventricularprematurebeatsappearedin8diversandventricularprematurebeatsin5diversduringexposure.TransientischemicST-Tchangesin6diversoccurredrepeatedlyduringdivingoperations.ThediscussionputsuptheviewthattheST-Tchangeswereduetothestressreactionofthebodyinducedbythecombinedeffectofsuchstressfactorsashyperbaricpressureperse,highpartialpressureofoxgen,noiseandtheclosedrestrictedchamberenvironment.