Analysis of repolarization heterogeneity using dipolar and non diopolar components

ARINI, PEDRO. VALVERDE, ESTEBAN. BERTRÁN, GUILLERMO. LAGUNA, PABLO. BIAGETTI, MARCELO

Buenos Aires, Argentina

Congreso; XII International Meeting, Latin American Section of the International Society for Heart Research; 2003

International Society for Heart Research

Singular value decomposition was used to transfer 40 ECGs derived signals from isolated rabbit hearts into a minimal orthogonal space. T wave residuum (TWR), T wave nondipolar (ND) components  with respect to total T wave components, was evaluated as measurement of spatial heterogeneity during premature stimulation of the right (RV) and left (LV) ventricles. The dipolar (D) components were also calculated to explain the paradoxical decrement of TWR. TWR is influenced both by the increase in D and ND components and could fail to describe repolarization heterogeneity.