Đặc điểm điện thế muộn ở người bình thường

To evaluate the parameters used in the late potential analysis in 87 normal subjects. Subject and method: Reports were performed by using the MAC HD 5500 high resolution electrocardiogram recorder, with filters at 40-250Hz. The parameters obtained were: HFQRS (The QRS duration based on the filtered high frequency signal), LAHF (Duration of the high frequency, low amplitude portion at the end of QRS cycle, RMS 40 (Root mean square value of the high frequency signal for terminal 40ms of the ventricular activation). Result: The average age was 64.15 ± 7.82 (from 44 to 84 years old), the male/female ratio was ~ 2.2/1. The obtained VLP parameters were HFQRS: 80.99 ± 8.01 (ms) and LAHF: 31.87 ± 6.05 (ms); and RMS40: 32.91 ± 11.41 (µV). The difference between the two sexes was not statistically significant. The correlation between late potentials parameters with age, height, and weight were weak. Conclusion: The late potential parameters in the research group were within the threshold of late potential values in normal people of the world. These parameters were not influenced by racial factors, and anthropometric indices.