Author/Editor		Starc, Vito
Title		Multi-channel system for beat to beat QT interval variability
Type		monografija
Place		Alexandria
Publisher		United states patent and trademark office
Publication year		2007
Volume		str. 24
Language		eng
Abstract		A PC-based ECG software program that in real time, acquires, analyzes and displays QTV and PQ interval variability (PQV) in each of the independent channels that constitute the 12-lead conventional and/or Frank X, Y, Z lead ECG. The system also analyzes and displays the QTV and PQV from QT and PQ interval signals that are derived from multiple channels and from singular value decomposition such that the effect of noise and other artifacts on the QTV and PQV results are substantially reduced compared to existing single-channel methods. Moreover, this invention also provides certain new parameters of T-wave (and QRS and P-wave) morphology, that in initial studies have improved clinical diagnostic utility and/or reproducibility and reliability compared to known existing parameters of T-wave morphology. Finally, it also provides a method for determining the beat-to-beat variability these T, QRS and P-wave morphologic parameters.
Descriptors		ELECTROCARDIOGRAPHY MICROCOMPUTERS SOFTWARE DESIGN