2018 Volume Annual56 Issue Abstract Pages S149
Spiral wave (SW) plays a significant role in tachyarrhythmia. The common aim of various arrhythmia therapies is prevention and termination of SWs. Although elucidation of the complex SWs dynamics accompanying generation, shift, and annihilation is important for effective therapy, objective tracking of SW center has been difficult. In this session, we introduce the novel technique named phase variance analysis which we developed for quantitative analysis of SW dynamics. In this method, SW center is defined as a peak of a distribution which shows the variance of phase values around each point. This method improved the accuracy of SW center tracking dramatically (99.8%). Moreover, the mean value map of fluctuating phase variance value at each point visualized the region over which SW center moves frequently. These results indicate that phase variance analysis enables objective analysis of complex SW dynamics and it is valuable as a diagnostic indicator for arrhythmia therapies.
