Location and number of rotors in the right and left atria among patients who underwent PVRI plus FIRM ablation. Image adapted from Miller et al12. FIRM, focal impulse and rotor modulation; IVC, inferior vena cava; LA, left atrium; LAA, left atrial appendage; LIPV, left inferior pulmonary vein; LSPV, left superior pulmonary vein; MV, mitral valve; PV, pulmonary vein; PVRI, pulmonary vein reisolation; RA, right atrium; RAA, right atrial appendage; RIPV, right inferior pulmonary vein; RSPV, right superior pulmonary vein; SVC, superior vena cava; TV, tricuspid valve