Key result
Limiting reactive hyperemia to approximately 100-115% repayment of the blood flow debt resulted in restoration of normal coronary vascular tone without the need for markedly excess arterial inflow.
Why the study?
Does limiting reactive hyperemia to approximately 100% repayment of blood flow debt restore coronary vascular tone in awake dogs?
Population
Unanesthetized dogs with electromagnetic flowmeters and hydraulic occluders chronically implanted on their…
Comparison
10-second coronary artery occlusions with… vs Isolated control occlusion with unrestricted…
Design
Preclinical
Authors
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Does not support changes to clinical reperfusion strategies; leaves open mechanisms of coronary tone recovery in humans.
Does limiting reactive hyperemia to approximately 100% repayment of blood flow debt restore coronary vascular tone in awake dogs?
The markedly excess arterial inflow typically seen during coronary reactive hyperemia is not essential for the restoration of coronary vascular tone.
Bache et al. (1974) studied Coronary vascular response to ischemia. Limitation of reactive hyperemia vs. Isolated control occlusion (unlimited reactive hyperemia) was evaluated on Restoration of coronary vascular tone (reactive hyperemia following a second occlusion or after release of partial occlusion). Limiting reactive hyperemia to approximately 100-115% repayment of the blood flow debt resulted in restoration of normal coronary vascular tone without the need for markedly excess arterial inflow.
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