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- W4379508230 abstract "Intracoronary acetylcholine (ACh) provocation is an established method for diagnosing epicardial and microvascular vasospasm in contemporary clinical practice. We hypothesize that ACh-induced vasospasm is followed by post-spastic reactive hyperemia (PSRH), which is measured as an increased flow-recovery time. To assess flow-recovery time, indicative of ischemia, among the diagnostic endotypes that follow ACh provocation testing. Patients with angina and non-obstructive coronary artery disease on angiography who underwent ACh provocation testing were included in this analysis. Doppler flow was continuously measured during the procedure and used to determine the flow-recovery time, which was calculated as time between cessation of ACh infusion and the point of flow recovery. Conventional provocation testing according to the COVADIS criteria diagnosed vasospasm in 63%(77/123), an equivocal result in 22%(27/123) and a negative result in 15%(19/123) of patients. In reaction to the highest-dose of ACh, flow-recovery time was significantly extended and similar in the epicardial, microvascular and equivocal test results compared to the negative result (all p < 0.001) indicative of PSRH. Flow-recovery time in patients with an equivocal result is similar to patients with vasospasm, which indicates the occurrence of myocardial ischemia and therefore, these patients may benefit from medical treatment." @default.
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- W4379508230 date "2023-08-01" @default.
- W4379508230 modified "2023-10-16" @default.
- W4379508230 title "Post-spastic flow recovery time to document vasospasm induced ischemia during acetylcholine provocation testing" @default.
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- W4379508230 doi "https://doi.org/10.1016/j.ijcha.2023.101220" @default.
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