2013 ESC Guidelines on cardiac pacing and cardiac resynchronization therapy : the Task force on cardiac pacing and resynchronization therapy of the European Society of Cardiology (ESC) : developed in collaboration with the European Heart Rhytm Association (EHRA). In Cardiology letters. ISSN 1338-3655. Bratislava : Slovenská kardiologická spoločnosť SLS, 2014, 2014, vol. 23, no. 6, s. 410-454.