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• W2062344434 abstract "Introduction Ranolazine reduces the Na‐dependent calcium overload via inhibition of the late sodium current, improving diastolic tone and oxygen handling during myocardial ischemia. In patients with angina, evidence of myocardial ischemia, but no obstructive coronary artery disease ( CAD ), abnormal coronary autoregulation plays a key role. Transthoracic Doppler–derived coronary flow reserve ( CFR ) is an index of coronary arterial reactivity and decreases in both microvascular dysfunction and coronary artery stenosis. The aim of this study was to assess the effect of ranolazine on CFR in this group of patient. Methods Fifty‐eight (39M, 19F) patients with angina and evidence of myocardial ischemia, but no obstructive CAD , were enrolled in a double‐blind, placebo‐controlled trial. Participants were assigned to ranolazine (29) or placebo (29) for 8 weeks (up to 500 mg twice a day). CFR was determined as the ratio of hyperemic, induced by intravenous dypiridamole administration, to baseline diastolic coronary flow velocity. CFR was assessed before and after 8‐week therapy. Results CFR was successfully performed in all patients. There were no significant differences in baseline characteristics and CFR between ranolazine and placebo group. After 8 weeks CFR significantly increased in ranolazine group (2.54 ± 0.44 vs. 1.91 ± 0.31; P = 0.005) but not in placebo group (1.99 ± 0.32 vs. 1.94 ± 0.29; P = ns). No patient dropped out during 8 weeks therapy. Side effects were similar in both groups. Conclusions Ranolazine is able to improve CFR in these patients. This is probably due to improvement in abnormal coronary autoregulation, both reducing baseline diastolic coronary flow velocity and increasing hyperemic diastolic coronary flow velocity." @default.
• W2062344434 created "2016-06-24" @default.
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• W2062344434 date "2014-07-04" @default.
• W2062344434 modified "2023-10-11" @default.
• W2062344434 title "Effects of Ranolazine on Noninvasive Coronary Flow Reserve in Patients with Myocardial Ischemia But without Obstructive Coronary Artery Disease" @default.
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• W2062344434 doi "https://doi.org/10.1111/echo.12674" @default.
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