Table 2

Comparison of noninvasive ECGI with invasive EP study. Patients are identified on the basis of VT localization: RVX for patient X with right ventricular localization, and LVX for patient X with left ventricular localization. Discrepancies between ECGI and EPS are in bold. Because of the thin tissue in the outflow tract, patients with outflow tract SOO were excluded from myocardial depth analysis. Arrhythmias starting from a focal origin and spreading radially in the ECGI activation map are classified as “radial,” because ECGI cannot differentiate between focal mechanism and micro-reentry. LV, left ventricle; RV, right ventricle; RVOT, right ventricular outflow tract; N/A, not available.

Patient
number
LocalizationMechanismMyocardial depth
ECGIEPSECGIEPSECGIEPS
Right ventricle
RV1Anterior-left RVOTAnterior-left RVOTRadialFocalExcludedExcluded
RV2Mid-septal RVOTMid-septal RVOTRadialFocalExcludedExcluded
RV3Mid-septal RVOTMid-septal RVOTRadialFocalExcludedExcluded
RV4Posterior-right RVOTPosterior-right RVOTRadialFocalExcludedExcluded
RV5Anterior-left RVOTN/ARadialN/AExcludedExcluded
RV6Free wall RVOTFree wall RVOTRadialFocalExcludedExcluded
RV7Mid-septal RVOTMid-septal RVOTRadialFocalExcludedExcluded
RV8Free wall RVOTFree wall RVOTRadialFocalExcludedExcluded
RV9Mid-septal RVOTMid-septal RVOTRadialFocalExcludedExcluded
RV10Inferior basal lateral RVInferior basal septal RVRadialFocalEpicardialEpicardial
RV11Posterior-right RVOTPosterior-right RVOTRadialFocalExcludedExcluded
Left ventricle
LV1Lateral apical LVLateral apical LVRadialFocalEpicardialEpicardial
LV2Inferior basal septal LVInferior basal septal LVReentryReentryFractionatedEndocardial
LV3Inferior lateral apical LVInferior lateral apical LVReentryReentryFractionatedMid-myocardial
LV4Apical septal LVFascicularRadialFocalIntramuralEndocardial
LV5Apical septal LVFascicularRadialFocalIntramuralEndocardial
LV6Anterior basal LVAnterior basal LVRadialFocalEpicardialEpicardial
LV7Left coronary cuspLeft coronary cuspRadialFocalExcludedExcluded
LV8Lateral basal LVN/AReentryN/AEpicardialN/A
LV9Septal basal LVSeptal basal LVReentryReentryFractionatedEndocardial
LV10Septal basal LVN/ARadialN/AEpicardialN/A
LV11Anterior LVApical LVReentryReentryFractionatedMid-myocardial
LV12Inferior basal LVN/AReentryN/AFractionatedN/A
LV13Lateral basal LVLateral basal LVRadialFocalEpicardialEpicardial
LV14Mid-anterior LVMid-anterior LVReentryReentryFractionatedEndocardial
LV15LV summitGreat cardiac veinRadialFocalEpicardialEpicardial