Piotr Futyma1, Piotr Kułakowski2. 1. Invasive Cardiology Department, St. Joseph's Heart Center, Rzeszów, Poland. Electronic address: piotr.futyma@gmail.com. 2. Invasive Cardiology Department, St. Joseph's Heart Center, Rzeszów, Poland; Department of Cardiology, Postgraduate Medical School, Grochowski Hospital, Warsaw, Poland.