Comparative analysis of daily electrocardiogram monitoring recording using the “standard” and “optimized” techniques of electrode placement on the chest

Abstract

Objective. To analyze a HM ECG recording in the placement of the electrodes in accordance with the procedure established by the manufacturer for the domestic recorder “Cardian-SDM” and in changed placement of the electrodes.Materials and methods. The study included 30 patients, the average age of the subjects was 34.7 ± 16.9 years, the median was 23 years, of which males accounted for 40 % (n = 12), females – 60 % (n = 18). When analyzing the HM ECG, the amplitude of the main ECG teeth, the displacement of the ST segment, and the change in the morphology of extrasystolic complexes were evaluated using the “standard” and “optimized” recording techniques. Such parameters as sensitivity and specificity of the proposed method were determined. The statistical analysis was carried out using the SPSS Statistics program.23 and Microsoft Excel.Results. During the automatic analysis of significant deviations in the amplitude of the ECG waves, rhythm disturbances, no ST segment changes were not registered when using the “optimized” technique compared to the “standard” one. The analysis of 30 HM ECG episodes taking into account the amplitude of the main teeth according to the “optimized” technique has a specificity of 93.4 % and sensitivity of 96.7 %, the deviation of the amplitude parameters has no significant differences, p > 0.05.Conclusion. The changes in the amplitude of the teeth did not exceed 10 %, the duration of the complexes, segments, and intervals did not change, p > 0.05. The specificity of the proposed “optimized” technique was 93.4 %, sensitivity – 96.7 %. The “optimized” technique can be used instead of the existing one to improve the quality of the ECG recorded in patients during physical exercise.