1 Department of Electrocardiology, The John Paul II Hospital, Kraków, Poland. krzysiek.boczar@gmail.com.
2 Department of Electrocardiology, The John Paul II Hospital, Kraków, Poland.
3 Institute of Cardiology, Jagiellonian University Medical College, Kraków, Poland.
4 Department of Noninvasive Cardiovascular Laboratory, John Paul II Hospital, Kraków, Poland.
5 Department of Emergency Medical Service, Wroclaw Medical University, Wrocław, Poland.
6 Department of Coronary Disease and Heart Failure, Institute of Cardiology, Jagiellonian University Medical College, John Paul II Hospital, Kraków, Poland.