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Tachycardia arising from the VOM. A, Activation times were earliest in the VOM recordings. B and C, fluoroscopic images, showing a coronary sinus venogram, a circular catheter in the LIPV and a quadripolar catheter in the VOM. D, electroanatomical map of the tachycardia. E, Ethanol infusion led to tachycardia termination. 26 LIPV: left inferior pulmonary vein
