Quantifying the amplitude of microvolt T wave alternans with sparse principal component analysis / 生物医学工程学杂志
Journal of Biomedical Engineering
;
(6): 954-982, 2012.
Article
in Chinese
| WPRIM
| ID: wpr-246525
ABSTRACT
T wave alternans in ECG is an important prediction factor for a sudden death. It is crucial in clinic to quantify the amplitude of T wave alternans. However, T wave alternans are highly non-stationary, which makes accurate quantification very difficult. In this study, we proposed a new method to improve the amplitude quantification. We identified T wave alternans by principal component analysis (PCA) with statistical test, and processed the principal components with T wave alternans further by imposing sparse constraint. We evaluated and compared our method against other 4 popular solutions on an international benchmark database. The results including rank correlation coefficient and relative error indicate that this sparse principal component (SPC) based method is better than others.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Arrhythmias, Cardiac
/
Algorithms
/
Signal Processing, Computer-Assisted
/
Death, Sudden, Cardiac
/
Principal Component Analysis
/
Diagnosis
/
Electrocardiography
/
Methods
Type of study:
Diagnostic study
/
Prognostic study
Limits:
Humans
Language:
Chinese
Journal:
Journal of Biomedical Engineering
Year:
2012
Type:
Article
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