Open AccessRelationship between endothelial function in the coronary and brachial arteries
Author(s) -
Teragawa Hiroki,
Ueda Kentaro,
Matsuda Keiji,
Kimura Masashi,
Higashi Yukihito,
Oshima Tetsuya,
Yoshizumi Masao,
Chayama Kazuaki
Publication year - 2005
Publication title -
clinical cardiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.263
H-Index - 72
eISSN - 1932-8737
pISSN - 0160-9289
DOI - 10.1002/clc.4960281004
Subject(s) - medicine , brachial artery , cardiology , endothelial dysfunction , coronary arteries , peripheral , artery , vasodilation , endothelium , sublingual administration , coronary atherosclerosis , coronary artery disease , blood pressure
Background : Endothelial dysfunction is the first step in the progression to atherosclerosis, but little is known regarding whether there is a correlation in endothelial function between the coronary and peripheral arteries. Hypothesis : We investigated the relationship between coronary and peripheral endothelial function. Methods : In 41 patients (mean age 63 years; 23 men, 18 women) with angiographically normal coronary arteries, changes in brachial artery diameter in response to hyperemic flow and sublingual nitroglycerin (NTG) were measured by high‐resolution ultrasonography. During coronary angiography, acetylcholine (ACh, 3 and 30 μg/min) and NTG were infused into the left coronary ostium. The diameter of the coronary artery was quantitatively measured and coronary blood flow (CBF) was calculated by quantitative angiography and Doppler flow velocity measurements. Changes in these parameters in response to each drug infusion were expressed as the percent change from the baseline values. Results : Flow‐mediated dilation (FMD) of the brachial artery was 5.0 ± 3.5% and correlated positively not only with the change in coronary diameter (ACh at 30 μg/min, r=0.31, p<0.05) but also with the change in CBF (ACh at 3 μg/min, r=0.39, p<0.05; ACh at 30 μg/min, r=0.46, p<0.01). Multivariate analysis demonstrated that FMD was one of the factors associated with the changes in coronary diameter and CBF. Conclusions : These results suggest that brachial endothelial function is associated with coronary endothelial function in patients with angiographically normal coronary arteries, suggesting that impairment of endothelial function may occur simultaneously in both coronary and peripheral arteries.