An improved spectral method of detecting and quantifying T-wave alternans for SCD risk evaluation

Author

Shen, TW ; Tsao, YT

Author_Institution

Tzu Chi Univ., Hualien

fYear

2008

fDate

14-17 Sept. 2008

Firstpage

609

Lastpage

612

Abstract

T-wave alternans (TWA) is widely understood as an important indicator and a predictor of risk of sudden cardiac death (SCD). This research provides an improved spectral method of detecting and quantifying T-Wave alternans. Basically, the algorithm used enhanced TWA spectrum and T-Slope variations to generate two parameters: enhanced alternans ratio (EAR) and range index (RI). Then, the singular value decomposition method was applied to fuse two parameters. The results showed that our method has 82.4% accuracy on MITSCD database and 76.7% accuracy on normal healthy individuals. Moreover, the method achieved the 0.636 final score on the official PhysioNet Challenge 2008 dataset.

Keywords

cardiovascular system; electrocardiography; medical signal processing; singular value decomposition; spectral analysis; MITSCD database; PhysioNet Challenge 2008 dataset; SCD risk evaluation; T-slope variations; T-wave alternans; TWA spectrum; enhanced alternans ratio; range index; singular value decomposition; spectral method; sudden cardiac death; Cardiology; Correlation; Databases; Demodulation; Frequency; Heart; Karhunen-Loeve transforms; Samarium; Working environment noise; Yttrium;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology, 2008

Conference_Location

Bologna

ISSN

0276-6547

Print_ISBN

978-1-4244-3706-1

Type

conf

DOI

10.1109/CIC.2008.4749115

Filename

4749115