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. Author manuscript; available in PMC: 2008 Dec 1.
Published in final edited form as: Heart Rhythm. 2007 Aug 29;4(12):1565–1567. doi: 10.1016/j.hrthm.2007.08.019

Figure 2.

Figure 2

ECGI reconstructed isochrone map of the flutter cycle. Solid arrows show the reentry circuit. Dashed arrows show a secondary front emanated from the main reentry circuit. The sequence of reentry is 1→2→3→4→(6)→7→8→1. Black circles show locations of the four pulmonary veins. RA = Right Atrium, LA = Left Atrium, MV = Mitral Valve, TV = Tricuspid Valve. LIPV = Left Inferior Pulmonary Vein, LSPV = Left Superior Pulmonary Vein, RIPV = Right Inferior Pulmonary Vein, RSPV = Right Superior Pulmonary Vein, LAA = Left Atrial Appendage.