Gamma-glutamyl transferase and cardiovascular events in patients with congenital heart disease.

Introduction: Serum gamma-glutamyl transferase activity (GGT) seems to predict cardiovascular events in different populations. However, no data exist on patients with congenital heart disease (CHD).

Methods: Observational, analytic, prospective cohort study design involving CHD patients and a control population to determine the effect of GGT levels on survival.