Denmark midfielder Christian Eriksen was revived with the help of one electrical shock during Saturday's Euro match with Finland, according to one of the doctors on the scene.
Emergency doctor Jens Kleinefeld told Thursday's edition of the papers of the Funke publishing house that after several minutes of cardiopulmonary resuscitation, a defibrillator was used on the 29-year-old Eriksen and the electrical shock released once.
"The player opened his eyes around 30 seconds later and I could talk to him," Kleinefeld said.
"It was a very touching moment because the success rate in such medical emergencies is much lower in the day-to-day business."
Eriksen suffered cardiac arrest late in the first half of the game in Copenhagen.
He is in hospital and doing well, with tests however still being carried out.
Kleinefeld said he was 99 per cent sure in the stadium that Eriksen would arrive safely in hospital and his condition would remain stable.
"It is normally a 'short circuit' that triggers ventricular fibrillation with a medically checked professional athlete. The electrical shock then gives the decisive impulse that the heart beats again," Kleinefeld said.
"The probability that the heart will stop again is minimal with someone like this - unlike normal patients, for example with pre-existing illnesses."
Providing an update on Eriksen's status on Thursday, Denmark team doctor Morten Boesen said: "After Christian has been through different heart examinations it has been decided that he should have an ICD (heart starter)."
Australian Associated Press