Study limitations:
Results of this present study should be considered with regard to the
inherent limitations resulting in the design of this retrospective
single-center observational analysis of a historical series of selected
patients with GUCH. Data collection was not optimal, in terms of
clinical and echocardiographic parameters collected during follow-up,
without specific protocol of follow-up. Thereby, data were not collected
at the same time of follow-up, and were not complete because of patients
lost from follow-up. Mean time of follow-up is low and longer follow-up
is required to draw consistent conclusions from this case series.