Abstract
The highest mortality rate after cardiac transplantation, at present, occurs within the first year after cardiac transplantation. The state of the coronary microcirculation soon after cardiac transplantation has not been previously assessed. We investigated the hypothesis that coronary flow reserve (CFR) is impaired in the early postoperative period after cardiac transplantation. A 3F in-tracoronary Doppler flow probe was inserted into the left anterior descending coronary artery and maximal coronary flow was assessed using the non-endothelial-depen-dent vasodilator papaverine. We compared two groups of patients: group A — 13 patients studied 3 months after operation; and group B — 25 patients studied at a median of 4 years after operation (range 2–8 years) without coronary occlusive disease (COD). CFR was defined as the quotient of maximum hyperaemic to resting velocity (vel). CFR was markedly impaired in group A patients compared with group B (3.3 SEM 0.3 versus 4.2 SEM 0.2, P < 0.01). No significant differences between mean resting or peak velocities, original diagnosis, age, active rejection, blood pressure, lipid levels, ischaemic time, cyclosporin levels or cytomegalovirus (CMV) status were noted. Responses to papaverine in resistance coronary vessels are impaired in the early postoperative period after cardiac transplantation. This is caused by a combination of higher resting flow and lower peak flow in the early group. This impairment of function in the coronary microcirculation may contribute to early graft dysfunction and reflect changes in vascular smooth muscle function leading to the development of COD.
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© 1992 Springer-Verlag Berlin Heidelberg
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Mullins, P. et al. (1992). Coronary flow reserve is impaired early after cardiac transplantation. In: Kootstra, G., Opelz, G., Buurman, W.A., van Hooff, J.P., MacMaster, P., Wallwork, J. (eds) Transplant International Official Journal of the European Society for Organ Transplantation. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-77423-2_75
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DOI: https://doi.org/10.1007/978-3-642-77423-2_75
Publisher Name: Springer, Berlin, Heidelberg
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