Istel HR 2000 in clinical practice: diagnostic accuracy versus standard ECG using aVR lead data
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EJTCM_2026_9_1_Firkowska.pdf (1.05 MB)
0009-0002-3289-9447 Date
2026-04-24
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Gdański Uniwersytet Medyczny
Abstract
Background: Mobile ECG devices are increasingly used in telecardiology, but the diagnostic utility of the Istel HR 2000 ECG recorder has not been fully established beyond AF detection. This study evaluated the accuracy and comparability of Istel recordings versus standard limb 6-lead ECG, with particular emphasis on the QRS vector in aVR lead. Material and methods: We compared standard ECGs of 59 adults with their Istel ECGs (recorded in up to 3 positions). The aVR vector was calculated by adding R and S/Q wave amplitudes. The correlations between aVR vectors were evaluated. Istel recordings with an aVR vector ≤ -1 mm in all positions were included for further comparative analysis of ECGs parameters. Results: The mean difference in aVR vector between standard and Istel ECGs was similar across all device positions. Based on the aVR criteria, 37 patients (62.7%) were eligible for further analysis. Istel recordings more frequently showed right axis deviation and T-wave abnormalities than standard ECG. Device position influenced ECG interpretation, with position 3 showing the highest concordance. Conclusions: Istel HR 2000 provides reproducible ECG recordings but cannot replace the standard limb ECG. Device position and altered lead geometry affect ECG interpretation. The aVR vector may help assess recording validity, although further studies are required.
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Firkowska A, Stepnowska J, Śron K, Młyński M, Bavnbek A, Kroczak K, Gonzalez M, Spychalski P. Istel HR 2000 in clinical practice: diagnostic accuracy versus standard ECG using aVR lead data. Eur J Transl Clin Med. 2026;9(1):20-26