The terrifying incident occurred during an Eredivisie match between his club NEC and AZ, when Dost collapsed on the field and required resuscitation. He was later diagnosed with myocarditis, an inflammation of the heart muscle. After an initial prognosis of six months for recovery, Dost suffered a devastating blow. "It was maddening. The prognosis was that the inflammation would disappear after six months. I thought I'd be able to play again next season," he said. "But in March, a scan was done – with dramatic results. The inflammation was almost back in full force. That was a slap in the face for me."