Summary
Many factors are known to influence pressure intercept and curvilinearity of coronary pressure-flow (P-F) relationships. In this paper, we focused on two of them, interarterial collateral circulation and outflow pressure elevation. We reviewed previous reports and reexamined their effects from the viewpoint of the beating/non-beating state. The presence of interarterial perfusion pressure gradients between the left anterior descending artery and the remaining vessels resulted in an increase in zero flow pressure (Pf = 0) and a more linear slope of the P-F relationship to the same degree in both the beating and non-beating states, through interarterial collateral circulation. This indicates that collateral circulation is not necessarily inhibited by cardiac contraction. Coronary outflow pressure elevation due to coronary sinus occlusion caused an increase in Pf = 0 without altering the slope of the P-F relationship, and the slope in the non-beating state shifted to the right more than in the beating state when coronary sinus pressure was elevated to the same level of 30 mmHg.
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© 1993 Springer-Verlag Tokyo
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Saito, T., Mitsugi, M., Saitoh, S., Sato, M., Maruyama, Y. (1993). Effects of Coronary Collateral Circulation and Outflow Pressure Elevation on Coronary Pressure-Flow Relationships in The Beating and Non-Beating States. In: Maruyama, Y., Kajiya, F., Hoffman, J.I.E., Spaan, J.A.E. (eds) Recent Advances in Coronary Circulation. Springer, Tokyo. https://doi.org/10.1007/978-4-431-68249-3_12
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DOI: https://doi.org/10.1007/978-4-431-68249-3_12
Publisher Name: Springer, Tokyo
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