 According to BBC News , most patients who suffer from extreme hypothermia die , even if doctors are able to restart their hearts . The survival rate for adults whose body temperature has decreased to below 28 ° C ( 82 ° F ) is 10 % – 33 % . Prior to Bågenholm 's accident , the lowest survived body temperature was 14 @.@ 4 ° C ( 57 @.@ 9 ° F ) , which had been recorded in a child . Gilbert said " victims of very deep accidental hypothermia with circulatory arrest should be seen as potentially <unk> with a prospect of full recovery . The key success factors of such marginal resuscitation efforts are early bystander actions with vigorous CPR and early warning of the emergency system , early dispatch of adequate rescue units ( ground and air @-@ ambulances ) and good co @-@ ordination between the resources outside and inside the hospital , aggressive <unk> and a spirit not to give up . " General practitioner <unk> Coward from Tywyn , Wales , said persons who are victims of extreme hypothermia are often mistakenly thought dead because it can be difficult to detect a pulse on them . He said this case " really does bring it home to us how cautious one has to be before diagnosing death in people who are cold . " 
