VT Complication of Flutter Ablation, A 61-year-old woman with dilated cardi
omyopathy, who previously underwent successful radiofrequency catheter abla
tion for atrial flutter, developed monomorphic ventricular tachycardia (VT)
. The site of VT origin was the inferobasal right ventricle adjacent to the
previous atrial isthmus ablation area. The most likely mechanism for the V
T was scar-related reentry, the scar being the result of previous radiofreq
uency lesions in the atrial isthmus, The VT was successfully ablated.