Validation of the V-index as a metric of ventricular repolarization dispersion using intracardiac recordings
Contributo in Atti di convegno
Data di Pubblicazione:
2015
Citazione:
Validation of the V-index as a metric of ventricular repolarization dispersion using intracardiac recordings / M. Orini, C. Blasi, M. Finlay, B. Hanson, P. Lambiase, R. Sassi, L. Mainardi - In: Computing in Cardiology Conference (CinC), 2015[s.l] : IEEE Press, 2015. - ISBN 9781509006854. - pp. 673-676 (( Intervento presentato al 42. convegno CinC tenutosi a Nice nel 2015 [10.1109/CIC.2015.7411000].
Abstract:
The spatial heterogeneity of ventricular repoalarization (SHVR) is an important factor in arrhythmogenesis and it is related to increased vulnerability to fatal arrhythmia. The V-index is a non-invasive estimator of SHVR based on the analysis of the surface ECG. A significant correlation between the V-index and SHVR has been previously demonstrated theoretically and by means of numerical simulations. Also, the V-index has been shown to track expected changes in SHVR after infusion of drugs that alter the cardiac electrophysiology. In this study, we compare for the first time estimates from the V-index with direct measures of SHVR derived from unipolar elecrograms simultaneously recorded in the left and right ventricular endocardium and in the left ventricular epicardium. In 22 recordings collected in 14 patients with normal ventricles, the V-index showed a tight and significant correlation with directed measures of SHVR, with correlation coefficients as high as r = 0.80, whereas other ECG-derived estimates of SHVR based on T-peak and T-peak to T-end measures showed lower correlations (r les 0.41 and r les 0.36, respectively). The results of this study suggest that the V-index provides reliable estimates of SHVR.
Tipologia IRIS:
03 - Contributo in volume
Elenco autori:
M. Orini, C. Blasi, M. Finlay, B. Hanson, P. Lambiase, R. Sassi, L. Mainardi
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Link al Full Text:
Titolo del libro:
Computing in Cardiology Conference (CinC), 2015