Cryo means cryoenergy; min, minutes; n, number; RF, radiofrequency energy

For initial reason for failure; IM stands for inaccurate mapping; PC, inadequate lesion formation due to poor contact; DL, inadequate lesion formation due to deep location; PD, inadequate power delivery (inside the coronary sinus); LP, limited choice of radiofrequency power; CR, use of cryoablation, or U, unknown cause.