Key result
Low oxyhemoglobin affinity erythrocytes improve myocardial oxygen consumption and contractile function vs. high affinity cells.
Why the study?
Storage of blood can depress erythrocyte DPG levels and increase oxyhemoglobin affinity, potentially decreasing capillary-to-tissue oxygen transport and affecting cardiac function.
Does perfusion with low oxyhemoglobin affinity erythrocytes improve myocardial oxygen consumption and contractile function compared to high affinity erythrocytes in isolated rabbit hearts?
Population
Isolated rabbit hearts with fixed coronary flow
Comparison
High oxyhemoglobin affinity erythrocytes vs low oxyhemoglobin affinity erythrocytes
Design
Preclinical study measuring myocardial function and metabolism under basal and stress conditions
Authors
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May inform transfusion in coronary-limited states; leaves open translation from rabbit models to human practice.
Does perfusion with low oxyhemoglobin affinity erythrocytes improve myocardial oxygen consumption and contractile function compared to high affinity erythrocytes in isolated rabbit hearts?
Restoring normal oxyhemoglobin affinity in stored erythrocytes improves myocardial oxygen delivery and contractile function in an isolated rabbit heart model, suggesting potential relevance for transfusing patients with limited coronary flow.
Apstein et al. (1985) studied Myocardial function and metabolism. Low oxyhemoglobin affinity (OHA) erythrocytes vs. High OHA erythrocytes (standard storage conditions) was evaluated on Myocardial oxygen consumption and contractile function. Low oxyhemoglobin affinity erythrocytes released more oxygen and increased myocardial oxygen consumption and contractile function relative to high affinity cells during basal and stress states.
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