T-Wave Alternans Analysis in Portable ECG Monitor

T-wave alternans (TWA) has been recognized as a key index being related to sudden cardiac death (SCD) closely. In the past research, spectral method (SM) and modified moving average (MMA) are the main detection algorithms. TWA is a very weak signal and its detection is very difficult, especially in ambulatory electrocardiogram (AECG). In this paper, the strength and weakness are discussed firstly. Then based on MMA, a new detection algorithm is proposed. Only S-T-P sections are clustered to create odd and even complexes. The Euclidean distance between two complexes is considered as the matric of TWA level. The computation results illustrate the effect of our algorithm, and more improvement will remain in the future.