Myocardial oxygen utilization after reversible global ischemia
نویسندگان
چکیده
منابع مشابه
MYOCARDIAL PROTECTION Enhancement of recovery of myocardial function by oxygen freeradical scavengers after reversible regional ischemia
Reperfusion after reversible regional ischemia has been shown to result in delayed recovery of myocardial function, but the mechanism responsible for this phenomenon remains unknown. We explored the potential role of oxygen-free radicals as mediators of postischemic dysfunction in open-chest dogs undergoing a 15 min occlusion of the left anterior descending coronary artery (LAD) followed by 2 h...
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Although positron-emission tomography (PET) with labeled fatty acid delineates infarct size and permits qualitative assessment of fatty acid utilization, quantification of oxidative metabolism is limited by complex alterations in the pattern of utilization of fatty acid during ischemia and reperfusion. Because metabolism of acetate by myocardium is less complex than that of glucose or palmitate...
متن کاملMyocardial coefficient of oxygen utilization.
THE COEFFICIENT of oxygen utilization is defined as the arteriovenous difference in oxygen concentration divided by the concentration of oxygen in the arterial blood. Multiplication of the ratio by 100 converts the coefficient into the per cent of arterial oxygen which is removed by the tissue. The term "oxygen extraction ratio" is frequently used as a synonym. Conflicting reports have appeared...
متن کاملMyocardial ischemia: reversible and irreversible changes.
RECENTLY there has been a growing tendency to remove thrombi, either surgically or medically, from the coronary arterial systems of patients who have had myocardial infarctions. Such interventions are successful or fail depending on the duration of the obstruction , i.e., on whether the ischemic lesion is in the reversible or irreversible stage. It is therefore important to obtain more detailed...
متن کاملThe relationships between arterial oxygen flow rate, oxygen binding by hemoglobin, and oxygen utilization after myocardial infarction.
The interrelationships of arterial oxygen flow rate index, oxygen binding by hemoglobin, and oxygen consumption have been examined in patients with acute myocardial infarction. Proportional extraction of oxygen increased in close association with decreasing oxygen flow rate, and hence, whole body oxygen consumption was constant over nearly a three-fold variation in arterial oxygen flow rate. A ...
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ژورنال
عنوان ژورنال: The Journal of Thoracic and Cardiovascular Surgery
سال: 1990
ISSN: 0022-5223
DOI: 10.1016/s0022-5223(19)35560-6