Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 0 0 1971 12 15 165 180 M. AMELI 2015 09 28 Myocardial performance, utilizing the isolated canine heart preparation, was studied in two groups: normal control dogs and those subjected to hemorrhagic shock. A marked deterioration in myocardial functional capacity was observed in the shock group. From this study, myocardial incapacity resulting from the period of acute hypotension is felt to be a contributing factor in the death of animals with irreversible hemorrhagic shock. https://acta.tums.ac.ir/index.php/acta/article/view/4130 https://acta.tums.ac.ir/index.php/acta/article/download/4130/4105