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Significance of coronary artery tone in patients with vasospastic angina.

Abstract：

:To investigate the relation between basal coronary artery diameter and development of coronary artery spasm, the diameters of the proximal, middle and distal segments of the three major coronary artery branches, together with that of the left main trunk, were measured on a control angiogram and after ergonovine and nitrate administration in 30 patients with vasospastic angina without significant organic stenosis, and in 35 patients without ischemic heart disease. The percent change in coronary diameter after ergonovine and nitrate administration compared with the control diameter was used as an index of coronary vasoreactivity. In patients with vasospastic angina, coronary artery responses to both ergonovine and nitrate were greater in the spastic segments than in the other segments (p less than 0.05), and those of the coronary arteries without spasm were greater than those of the coronary arteries in patients without ischemic heart disease (p less than 0.01). There were no significant differences between the coronary artery diameters in the two groups after nitrate administration, and the control diameters were less in patients with vasospastic angina than in patients without ischemic heart disease. These observations indicate that a coronary vasomotion disorder, which involves increased basal coronary artery tone and hypersensitivity to vasoconstrictive stimuli, not only at a localized segment but also in the entire coronary artery tree, is present in patients with vasospastic angina. Clinically, evaluation of basal coronary artery tone may be useful for predicting the occurrence and location of coronary artery spasm.

journal_name

J Am Coll Cardiol

journal_title

Journal of the American College of Cardiology

authors

Hoshio A,Kotake H,Mashiba H

doi

10.1016/0735-1097(89)90100-9

subject

Has Abstract

pub_date

1989-09-01 00:00:00

pages

604-9; discussion 610-2

issue

3

eissn

0735-1097

issn

1558-3597

pii

0735-1097(89)90100-9

journal_volume

14

pub_type

杂志文章

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