The cause of Christian Eriksen's dramatic collapse during Denmark's Euro 2020 fixture with Finland, has been revealed by the Danish FA.
Eriksen, 29, collapsed during his team's math with Finland on Saturday evening fixture and was revived on the pitch before being rushed to hospital.
The Inter Milan player was quickly said to be conscious and stable, and has now sent messages to his teammates.
In a press conference on Sunday afternoon, the Danish FA provided details of what caused the incident at Parken in Copenhagen
Denmark's sporting director Peter Moller, team doctor Morten Boesen and head coach Kasper Hjulmand were in roke the news, saying Eriksen suffered a heart attack.
The former Tottenham Hotspur star required resuscitation on the pitch while teammate formed a shield around him for privacy and fans fell into stunned silence.
Germany team doctor Tim Meyer told reporters: "Fundamentally, we and other nations follow two strategies: 1. We examine our players regularly for underlying health issues.
"The DFB does this comprehensively and I presume that the Danish FA does too.
"2. When such cases occur, it is vital that those involved are able to take the right steps. Doctors and trained medical personnel are on standby.
"We always have two defibrillators, in case one fails. The chain of command and communication is clearly defined and works well.
"I personally don't think the DFB need take further action. We can never completely rule out these cases but we are well prepared. In fact, you could say we do too much.
"We consider the official recommendations as basic requirements, and we do even more."