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.