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. 2023 May 22;10:1168730. doi: 10.3389/fcvm.2023.1168730

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© 2023 Zhang, Wang, Sun, Zhai and Hu.

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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Funnel plot of the meta-analyses on effective rate in symptom improvement (A), markedly effective rate in symptom improvement (standard 1) (B), markedly effective rate in symptom improvement (standard 2) (C), effective rate in ECG improvement (D), markedly effective rate in ECG improvement (E), and the adverse drug reaction (F).