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The adult patient with congenital heart disease.

Introduction The acronym GUCH (Grown Up with Congenital Heart defect) identifies adolescent or adult with congenital heart defects (CHDs), either untreated or after palliative or definitive surgical corrections. In the past 40 years, progress in pediatric heart surgery led to reduction in surgical mortality and early successful definitive corrections with excellent long-term results. Accordingly, the GUCH population is increasing, and a study carried out in Quebec (Canada) in the year 2000 reveals a prevalence of congenital heart disease of 4.09/1000, of which 9% were affected with severe CHD.