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[Case report--Fontan patient on the Southside Festival--60 000 visitors / 119 999 ventricles].

Patients with univentricular congenital heart disease are treated with Fontan-procedure for more than 40 years resulting in mainly good life-quality for pediatric and now more and more adult patients. Due to prolonged life expectation and adequate physical state, adolescent and adult Fontan-patients participate in normal life activities like the main population. Mass events like open-air concerts and sport events belong to these activities.Since 1999 the Southside Festival is one of the main open air events in southern Germany with about 60.000 visitors. Visitors with minor or major health problems are treated by emergency response services like the German Red Cross, the German St Johns Ambulance and the German Order of Malta. The article refers to the special pathophysiology and management of Fontan-patients in emergency and anaesthesiologic settings based on a case report from the Southside Festival. Due to increasing "fontanpopulation" profound education of attending physicians and paramedics is inevitable to provide good quality in prehospital and innerhospital care.