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PURE Aarhus University
Article . 2021
License: CC BY NC ND
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Cardiac Arrest in Pigs With 48 hours of Post‐Resuscitation Care Induced by 2 Methods of Myocardial Infarction: A Methodological Description

Authors: Lauge Vammen; Cecilie Munch Johannsen; Andreas Magnussen; Amalie Povlsen; Søren Riis Petersen; Arezo Azizi; Bo Løfgren; +2 Authors

Cardiac Arrest in Pigs With 48 hours of Post‐Resuscitation Care Induced by 2 Methods of Myocardial Infarction: A Methodological Description

Abstract

Background Systematic reviews have disclosed a lack of clinically relevant cardiac arrest animal models. The aim of this study was to develop a cardiac arrest model in pigs encompassing relevant cardiac arrest characteristics and clinically relevant post‐resuscitation care. Methods and Results We used 2 methods of myocardial infarction in conjunction with cardiac arrest. One group (n=7) had a continuous coronary occlusion, while another group (n=11) underwent balloon‐deflation during arrest and resuscitation with re‐inflation after return of spontaneous circulation. A sham group was included (n=6). All groups underwent 48 hours of intensive care including 24 hours of targeted temperature management. Pigs underwent invasive hemodynamic monitoring. Left ventricular function was assessed by pressure‐volume measurements. The proportion of pigs with return of spontaneous circulation was 43% in the continuous infarction group and 64% in the deflation‐reinflation group. In the continuous infarction group 29% survived the entire protocol while 55% survived in the deflation‐reinflation group. Both cardiac arrest groups needed vasopressor and inotropic support and pressure‐volume measurements showed cardiac dysfunction. During rewarming, systemic vascular resistance decreased in both cardiac arrest groups. Median [25%;75%] troponin‐I 48 hours after return of spontaneous circulation, was 88 973 ng/L [53 124;99 740] in the continuous infarction group, 19 661 ng/L [10 871;23 209] in the deflation‐reinflation group, and 1973 ng/L [1117;1995] in the sham group. Conclusions This article describes a cardiac arrest pig model with myocardial infarction, targeted temperature management, and clinically relevant post‐cardiac arrest care. We demonstrate 2 methods of inducing myocardial ischemia with cardiac arrest resulting in post‐cardiac arrest organ injury including cardiac dysfunction and cerebral injury.

Keywords

Cardiopulmonary resuscitation, Swine, post‐cardiac arrest intensive care, Resuscitation, animal experiment, Myocardial Infarction, cardiac arrest, Pressure-volume measurements, Cardiac arrest, cardiopulmonary resuscitation, Post-cardiac arrest intensive care, Heart Arrest, Disease Models, Animal, Hypothermia, Induced, RC666-701, pressure‐volume measurements, Diseases of the circulatory (Cardiovascular) system, Animals, Animal experiment, Original Research

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
6
Top 10%
Average
Top 10%
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gold