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Pralidoxime-Induced Potentiation of the Pressor Effect of Adrenaline and Hastened Successful Resuscitation by Pralidoxime in a Porcine Cardiac Arrest Model

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Abstract

Purpose

Pralidoxime potentiated the pressor effect of adrenaline and facilitated restoration of spontaneous circulation (ROSC) after prolonged cardiac arrest. In this study, we hypothesised that pralidoxime would hasten ROSC in a model with a short duration of untreated ventricular fibrillation (VF). We also hypothesised that potentiation of the pressor effect of adrenaline by pralidoxime would not be accompanied by worsening of the adverse effects of adrenaline.

Methods

After 5 min of VF, 20 pigs randomly received either pralidoxime (40 mg/kg) or saline, in combination with adrenaline, during cardiopulmonary resuscitation (CPR). Coronary perfusion pressure (CPP) during CPR, and ease of resuscitation were compared between the groups. Additionally, haemodynamic data, severity of ventricular arrhythmias, and cerebral microcirculation were measured during the 1-h post-resuscitation period. Cerebral microcirculatory blood flow and brain tissue oxygen tension (PbtO2) were measured on parietal cortices exposed through burr holes.

Results

All animals achieved ROSC. The pralidoxime group had higher CPP during CPR (P = 0.014) and required a shorter duration of CPR (P = 0.024) and smaller number of adrenaline doses (P = 0.024). During the post-resuscitation period, heart rate increased over time in the control group, and decreased steadily in the pralidoxime group. No inter-group differences were observed in the incidences of ventricular arrhythmias, cerebral microcirculatory blood flow, and PbtO2.

Conclusion

Pralidoxime improved CPP and hastened ROSC in a model with a short duration of untreated VF. The potentiation of the pressor effect of adrenaline was not accompanied by the worsening of the adverse effects of adrenaline.

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Acknowledgements

We would like to thank Editage (www.editage.co.kr) for English language editing.

Availability of Data and Material

The data that support the findings of this study are included in electronic supplementary material (Online Resource 1).

Code Availability

Not applicable.

Funding

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2018R1A2B6001388). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. We would like to thank Editage (www.editage.co.kr) for English language editing.

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Contributions

Conceptualisation: Kyung Woon Jeung; Methodology: Hyoung Youn Lee, Najmiddin Mamadjonov, Kyung Woon Jeung, Yong Hun Jung, and Kyung-Sub Moon; Formal analysis: Byung Kook Lee; Investigation: Hyoung Youn Lee, Najmiddin Mamadjonov, Kyung Woon Jeung, and Yong Hun Jung; Writing-original draft preparation: Hyoung Youn Lee, Najmiddin Mamadjonov, and Kyung Woon Jeung; Funding acquisition: Kyung Woon Jeung; Resources: Yong Hun Jung and Kyung-Sub Moon; Supervision: Tag Heo and Yong Il Min; Writing-review and editing: Tag Heo and Yong Il Min.

Corresponding author

Correspondence to Kyung Woon Jeung.

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Ethics Approval

This study was approved by the Animal Care and Use Committee of Chonnam National University Hospital (CNUH IACUC-18004). Animal care and experiments were conducted according to the author’s Institutional Animal Care and Use Committee guidelines.

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Lee, H.Y., Mamadjonov, N., Jeung, K.W. et al. Pralidoxime-Induced Potentiation of the Pressor Effect of Adrenaline and Hastened Successful Resuscitation by Pralidoxime in a Porcine Cardiac Arrest Model. Cardiovasc Drugs Ther 34, 619–628 (2020). https://doi.org/10.1007/s10557-020-07026-5

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