The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Analysis of multi-lead QT dispersion by means of an algorithm implemented on Labview
Author:	Sahinoglu, Zafer
View Online:	njit-etd1998-003 (xi, 58 pages ~ 2.8 MB pdf)
Department:	Biomedical Engineering Committee
Degree:	Master of Science
Program:	Biomedical Engineering
Document Type:	Thesis
Advisory Committee:	Reisman, Stanley S. (Committee co-chair) Rockland, Ronald H. (Committee co-chair) Kristol, David S. (Committee member)
Date:	1998-08
Keywords:	Medical instruments and apparatus Electrocardiography Biometry
Availability:	Unrestricted
Abstract:	QT dispersion measurement is significant in diagnostic ECG, and several methods are proposed in the literature to implement QT measurement. This study consists of two parts: The first part was the development of an algorithm to measure both QT interval and QT dispersion. To check the reliability of the algorithm, 25 single channel ECGs were recorded and their QT intervals were computed. On two subjects, three and four lead ECG data were recorded respectively and their QT dispersions were statistically analyzed. Another part of this study dealt with the effect of the electric dipole of the heart on QT dispersion. It was found that the mean and the standard deviation of the resulting QT dispersions were significantly smaller than those found in previous studies. In near and far field analysis, subjecting the data to a student's T test revealed that both near and far field QT dispersion data were drawn from the same population.