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Journal Article
Multicenter Study
Randomized Controlled Trial
Coronary circulation responses to binodenoson, a selective adenosine A2A receptor agonist.
American Journal of Cardiology 2007 June 2
The purpose of this study was to define binodenoson dosing regimens that produce coronary hyperemia comparable to those of adenosine and that are tolerated well by patients. An open-label, randomized, parallel-group, multicenter study enrolled adult patients who had completed diagnostic cardiac catheterization. Coronary blood flow velocity (CBFV) was measured with a Doppler flow wire, and CBFV reserve was determined before binodenoson administration. Patients (n = 133) received a 3-minute infusion of 0.3, 0.5, or 1 microg/kg/min or a bolus intravenous injection of 1.5 or 3 microg/kg. Coronary hyperemic responses were evident within seconds of administering binodenoson, and the magnitudes and durations of coronary hyperemic responses were dose related. The 1.5- and 3-microg/kg doses, by infusion or bolus, produced maximal coronary hyperemia equivalent to CBFV reserve. All doses transiently decrease blood pressure and increased heart rate and rate-pressure product. In conclusion, the 1.5-microg/kg binodenoson bolus dose produced nearly maximal coronary hyperemia by 4.5 +/- 3.7 minutes that was sustained for 7.4 +/- 6.86 minutes, was accompanied by modest changes in blood pressure, heart rate, and rate-pressure product, and produced no adverse changes on electrocardiogram, including no second- or third-degree atrioventricular block.
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