1 John Paul II Hospital, The Adult Congenital Heart Disease Centre, Jagiellonian University Medical College, Kraków, Poland. p.skorek@szpitaljp2.krakow.pl.
2 Institute of Cardiology, Jagiellonian University Medical College, Kraków, Poland. p.skorek@szpitaljp2.krakow.pl.
3 Department of Electrocardiology, John Paul II Hospital in Krakow, Kraków, Poland.
4 John Paul II Hospital, The Adult Congenital Heart Disease Centre, Jagiellonian University Medical College, Kraków, Poland.
5 Institute of Cardiology, Jagiellonian University Medical College, Kraków, Poland.