Analysis of X-Electrocardiosignals for Single-Channel Device to Register Low-Amplitude Components of Electrical Heart Signals

Introduction. Ventricular late potentials (VLPs) are low-amplitude potentials located at the terminal part of the QRS complex in electrocardiogram (ECG) signals. The presence of VLPs indicates a high probability of heart function deviations. Currently, no single-channel devices are available to detect VLPs. Therefore, designing devices and developing algorithms to detect VLPs is a topical task. The aim of this research is to analyze the feasibility of registering VLPs using single-lead ECG signals. Materials and methods. X-lead signals were selected for this study. A total of 271 signals were analyzed using MATLAB. Preliminary estimates to detect VLPs were performed using the standard Simson method, which analyzes X-, Y-, and Z-lead signals through coherent accumulation and averaging of heartbeat signals to increase the signal-to-noise ratio. This study proposes analyzing only X-lead signals using the same method. Results. According to the standard method, 46 signals had VLPs. Using the proposed algorithm, 61 signals were detected to have VLPs. The probability of a correct decision when testing the algorithm exceeded 80%. Conclusion. The proposed algorithm can detect VLPs in X-lead signals. The results of this study will be useful in designing single-channel ECG analyzers with enhanced functionality.