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. 2024 Feb 6;11:1336291. doi: 10.3389/fcvm.2024.1336291

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© 2024 Gentile, Wik, Isasi, Baldi, Aramendi, Steen-Hansen, Fasolino, Compagnoni, Contri, Palo, Primi, Bendotti, Currao, Quilico, Vicini Scajola, Lopiano and Savastano.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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AMSA calculation process. AMSA was computed using a 2 s pre-shock ECG interval and free of chest compression artefacts, leaving a 1 s guard before the shock (A). Fast Fourier Transform with 1,024 points was used to compute the spectral amplitudes of the ECG, and AMSA was calculated at a 2–48 Hz frequency range (B).