UFC heavyweight Shane Del Rosario is showing his fighting spirit, as he continues to cling to life after going into full cardiac arrest on Tuesday.

Jason House, Del Rosario’s manager, updated the public via Twitter on Friday.

Shane continues to cling to life at Hoag hospital in Newport Beach, CA. After arriving at the emergency room in full cardiac arrest on Tuesday morning he was resuscitated to stable rhythm and blood pressure, but has not regained consciousness. Doctors believe he may suffer from a rare condition called Long QT Syndrome which is a genetic anomaly that can cause a sudden and life threatening heart rhythm abnormality, and may result in sudden death. Tragically, it strikes healthy young people and often is the first and only presentation of a heart problem.

Del Rosario, just 30 years old, is 11-2 in his pro MMA career. He competed twice for the UFC in 2012 and was slated for action in December.