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- W2013117594 abstract "To evaluate the nonspecific vasoconstrictor response to intravenous ergonovine, and identify patient-related factors that systematically alter changes in coronary dimensions, 33 subjects (22 women, 11 men), mean age 54 years (range 39 to 70) were studied using a standardized ergonovine provocation test (Stanford protocol). Clinical responses, systemic hemodynamics and electrocardiographic changes were determined, with quantitative arteriography used for sequential measurement of proximal right coronary dimensions. A progressive decrease in proximal right coronary diameter was observed, with average control values and final diameters equaling 3.25 +/- 0.49 and 2.56 +/- 0.49 mm, respectively, thus representing an overall -21.2% change from baseline. No significant differences existed in control dimensions when analyzed with respect to gender (3.20 +/- 0.59 vs 3.40 +/- 0.72 mm, women vs men, difference not significant), although women demonstrated a greater decrease from baseline values (0.80 +/- 0.30 vs 0.50 +/- 0.24 mm, women vs men, p less than 0.05). The presence of minor atherosclerotic disease, as determined by the presence of minor (less than 30% diameter) luminal irregularities within the right coronary artery, failed to alter control dimensions (3.30 +/- 0.48 vs 3.20 +/- 0.51 mm, normal vs atherosclerotic persons, difference not significant), but was associated with more ergonovine-induced coronary vasospasm (0.41 +/- 0.27 vs 0.84 +/- 0.21 mm, normal vs atherosclerotic persons, p less than 0.01). Therefore, sequential intravenous ergonovine maleate infusion resulted in progressive, nonspecific reductions in proximal right coronary artery dimensions in subjects without a history compatible with vasospastic angina. This nonspecific vasoconstrictor effect was accentuated in women and subjects with intimal irregularities suggestive of minor atherosclerotic coronary disease." @default.
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- W2013117594 date "1989-10-01" @default.
- W2013117594 modified "2023-09-27" @default.
- W2013117594 title "Quantitative arteriographic responses to ergonovine provocation in subjects with atypical chest pain" @default.
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- W2013117594 doi "https://doi.org/10.1016/0002-9149(89)90764-9" @default.
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