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- W2000005342 abstract "<h2>Abstract</h2> The relation between endocardial activation mapping and endocardial pace-mapping was evaluated in 8 dogs while they were on cardiopulmonary bypass. Pacing or recording was accomplished by using a balloon apparatus (with 32 bipolar electrodes) inserted through a left apical ventriculotomy. Ventricular tachycardia (VT) was produced by occlusion followed by reperfusion of the left anterior descending coronary artery. During each VT, activation mapping was performed and early sites determined. Pace-map correlates (sites at which endocardial pacing produced a similar QRS morphology to that of the VT) were also determined. Isochronous maps were constructed for activation mapping and pace-mapping. There was a total of 29 morphologically distinct VTs. Groups were delineated ] according to correlations between activation mapping and pace-mapping. In 14 episodes of VT (group 1), pace-mapping confirmed the findings of activation mapping with all early sites being pacemap correlates (total number of early sites (tES) = 19; total number of pace-map correlates (tPMC) = 88; tES same as tPMC=19). In 9 episodes of VT (group 2), there was a partial correlation between pace-mapping and activation mapping, such that pace-mapping when used with activation mapping appeared to further delineate the region of arrhythmogenesis (tES = 31; tPMC=59; tES same as tPMC=14). In 6 episodes of VT (group 3), there was no correlation between pace-mapping and activation mapping (tES = 15; tPMC=0). With the balloon apparatus, endocardial activation mapping can be performed without the need for sustained monomorphic VT, and endocardial pace-maps may be generated easily. Although pace-mapping is less specific and accurate than activation mapping in determining the origin of VT, its use with activation mapping may provide greater resolution than with either technique alone. By comparing pace-map correlates with early sites and using respective isochronous maps, a refined view of the origin and conduction of VT may be obtained." @default.
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- W2000005342 date "1985-04-01" @default.
- W2000005342 modified "2023-09-24" @default.
- W2000005342 title "Endocardial activation mapping and endocardial pace-mapping using a balloon apparatus" @default.
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- W2000005342 doi "https://doi.org/10.1016/0002-9149(85)90750-7" @default.
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