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KMID : 0895520160200020007
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Journal of the Korean Society of Emergency Medical Technology
2016 Volume.20 No. 2 p.7 ~ p.19
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Early hypothermia improves outcomes of cardiopulmonary resuscitation after cardiac arrest in acute myocardial infarction rat m
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Park Jeong-Hyun
Im Hee-Kyung
Kim Jee-Hee
Lee Young-Il
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Abstract
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Purpose: To investigate the effect of early hypothermia on post-resuscitation myocardial recovery and survival time after cardiac arrest and resuscitation in a rat model of myocardial infarction(MI).
Methods: Thoracotomies were performed in 10 male Sprague Dawley rats weighing 450-455g. Myocardial infarction was induced by ligation of the left anterior descending coronary artery. Ninety minutes after arterial ligation, ventricular fibrillation was induced, cardiopulmonary resuscitation was subsequently performed before defibrillation was attempted. Animals were randomized to control group and experimental group(acute MI-normothermia)(32 ℃ for 4 hours). Duration of survival was recorded. Myocardial functions, including cardiac output, left ventricular ejection fraction, and myocardial performance index were measured using echocardiography.
Results: Myocardial function was significantly better in hypothermia group than the control group during the first 4 hours post-resuscitation. The survival time of the experimental group was greater than that of the control group(p<.050).
Conclusion: This study suggests that early hypothermia can attenuate post-resuscitation myocardial dysfunction after acute myocardial function, and may be a useful strategy in post-resuscitation care.
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KEYWORD
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Cardiac arrest, Cardiopulmonary resuscitation, Hypothermia, Myocardial infarction
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