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Abstract Myocardial protection during cardiac surgery aims to preserve inyocardium energy requirements while providing excellent conditions for performing the operative procedure.Myocardial protection, since the original reports of Bigelow 1950, has been obtained by decreasing of oxygen needs as a consequence of hypothennia. Melrose 1955 subsequently described the use of electroinechanical cardiac arrest induced by potassium injection, which allowed surgery to be performed on a non-beating heart. When both of these techniques are combined, there is little advantage to be gained and neither has proven superiority or complete efficacy. |