Acta Med. 1999, 42: 15-17

https://doi.org/10.14712/18059694.2019.140

Changes of Signal-Averaged ECG in Normal Subjects After One Year

Jiří Ceral, Jiří Kvasnička, Josef Jandík

Charles University in Prague, Faculty of Medicine in Hradec Králové, 1st Department of Internal Medicine, Hradec Králové, Czech Republic

Received February 1, 1999
Accepted April 1, 1999

Repeated signal-averaged electrocardiograms (SA ECG) were recorded twice with a mean interval of 13 months in 11 healthy volunteers in order to acquire basic information on long-term changes of SA ECG. After one year the duration of filtered QRS remains the most stable parameter of SA ECG on the contrary to parameters describing end of fQRS - i.e. both HFLA and RMS. Moreover fQRS seems to have better specificity in comparison to HFLA and RMS. An estimation of significant long-term changes in individual parameters of SA ECG was obtained. According to our results, only changes in QRS ± 13 ms, fQRS ± 8 ms, HFLA ± 22 ms and RMS ± 17 mV should be considered significant when found in a long-term follow-up of patients with a heart disease.

Funding

This study was supported by Grant 2942-2 of the Grant Agency, Ministry of Health of the Czech Republic.

References

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