Figure 3 The activation maps of the left atrium (A )
and right atrium (B ). Electrical propagation is indicated by
yellow arrows. An incomplete block line (white line) was observed at
both sides of the interatrial septum, and a narrow isthmus was located
at its annular end. The schema of the electrical activation in the atria
before (C ) and after (D ) the ethanol infusion to the
vein of Marshall (VOM). A gray area indicates a slow conduction area.
AVN, atrioventricular node; BB, Bachman bundle; CS, coronary sinus; CTI,
cavotricuspid isthmus; FO, fossa ovalis; IVC, inferior vena cava; LAA,
left atrial appendage. LIPV, left inferior pulmonary vein; LSPV, left
superior pulmonary vein; MA, mitral annulus; MI, mitral isthmus; RAA,
right atrial appendage; RIPV, right inferior pulmonary vein; RSPV, right
superior pulmonary vein; SN, sinus node; SVC, superior vena cava; TA,
tricuspid annulus.