A new TU complex detection and characterization algorithm, which includes mathematical modeling and U-wave characterization, showed better results for T waves compared to existing algorithms.
A novel algorithm combining mathematical modeling and threshold comparison improves T wave detection and introduces U wave characterization for ECG signals.
In this paper, we present a new TU complex detection and characterization algorithm that consists of two stages; the first is a mathematical modeling of the electrocardiographic segment after QRS complex; the second uses classic threshold comparison techniques, over the signal and its first and second derivatives, to determine the significant points of each wave. Later, both T and U waves are morphologically classified. Amongst the principal innovations of this algorithm is the inclusion of U-wave characterization and a mathematical modeling stage, that avoids many of the problems of classic techniques when there is a low signal-to-noise ratio or when wave morphology is atypical. The results of the algorithm validation with the recently appeared QT database are also shown. For T waves these results are better when compared to other existing algorithms. U-wave results cannot be contrasted with other algorithms as, to our knowledge, none are available. Examples showing the causes of principal discrepancies between our algorithm and the QT database annotations are also given, and some ways of attempting to improve and benefit from the proposed algorithm are suggested.
Vila et al. (2000) studied Electrocardiographic TU complex characterization. TU complex detection and characterization algorithm vs. Other existing algorithms was evaluated on Algorithm validation results using the QT database. A new TU complex detection and characterization algorithm, which includes mathematical modeling and U-wave characterization, showed better results for T waves compared to existing algorithms.