Comparison of mapping criteria for hemodynamically tolerated, postinfarction ventricular tachycardia |
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| Authors: | Frank Bogun MD Hyungjin Myra Kim ScD Jihn Han MD Kamala Tamirissa MD David Tschopp MD Stephen Reich MD Darryl Elmouchi MD Petar Igic MD Kristina Lemola MD Eric Good DO Hakan Oral MD Aman Chugh MD Frank Pelosi MD Fred Morady MD |
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| Affiliation: | University of Michigan Medical Center, Ann Arbor, Michigan 48109-0366, USA. fbogun@umich.edu |
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| Abstract: | BACKGROUND: Mapping criteria for hemodynamically tolerated, postinfarction ventricular tachycardia (VT) have been evaluated in only small series of patients. OBJECTIVES: The purpose of this study was to evaluate the utility of various mapping criteria for identifying a critical VT circuit isthmus in a post hoc analysis. METHODS: Ninety VTs (cycle length 491 +/- 84 ms) were mapped in 48 patients with a prior myocardial infarction. The mapping catheter was positioned within a protected area of the reentrant circuit of the targeted VTs at 176 sites. All sites showed concealed entrainment. The predictive values of the following mapping criteria for a successful ablation site were compared: discrete isolated potential during VT, inability to dissociate the isolated potential from the VT, endocardial activation time >70 ms, matching electrogram-QRS and stimulus-QRS intervals, VT termination without global capture during pacing, stimulus-QRS/VT cycle length ratio
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| Keywords: | Ventricular tachycardia Mapping Postinfarction Radiofrequency ablation |
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