PT - JOURNAL ARTICLE AU - Concetta Irace AU - Salvatore De Rosa AU - Cesare Tripolino AU - Giuseppe Ambrosio AU - Caterina Covello AU - Ennio Abramo AU - Claudio Carallo AU - Annalisa Mongiardo AU - Carmen Spaccarotella AU - Daniele Torella AU - Agostino Gnasso AU - Ciro Indolfi TI - Delayed flow-mediated vasodilation and critical coronary stenosis AID - 10.1136/jim-2017-000644 DP - 2018 Jun 01 TA - Journal of Investigative Medicine PG - 1--7 VI - 66 IP - 5 4099 - http://hw-f5-jim.highwire.org/content/66/5/1.5.short 4100 - http://hw-f5-jim.highwire.org/content/66/5/1.5.full SO - J Investig Med2018 Jun 01; 66 AB - Endothelial dysfunction, wall thickening and plaque are progressive manifestations of atherosclerosis. Delayed or absent brachial artery dilation after ischemic stimulus has been associated with severity of extracoronary and coronary atherosclerosis. In the current study, we aimed to verify if delayed or absent dilation associates with critical coronary stenosis. We also evaluated the association between coronary stenosis, carotid artery wall thickness and peripheral artery disease. Endothelial function was investigated by flow-mediated dilation of the brachial artery up to 3 min after ischemia, and patients classified as early, late or no dilators. Coronary angiography was performed through transradial or femoral artery approach. Computerized quantitative angiography was used to obtain percent stenosis of all lesions, while the Gensini score was used to evaluate the severity of coronary atherosclerosis. Seventy-four patients were enrolled. Carotid wall thickness and plaque, and peripheral artery disease were detected by ultrasound. Subjects with critical coronary stenosis showed a higher prevalence of delayed or absent dilation (coronary stenosis ≥70 per cent: late dilators 50 per cent, no dilators 35 per cent; coronary stenosis ≤70 per cent : late dilators 27 per cent, no dilators 6 per cent). The Gensini score was progressively higher in late dilators and no dilators compared with early dilators (early: 4.5±13.5; late 17.5±27.1; no 39.7±55.0; P<0.02). Carotid atherosclerosis and peripheral artery disease were more prevalent in subjects with critical coronary stenosis. Delayed or absent dilation associates with coronary stenosis and different degree of coronary atherosclerosis. The kinetic of arterial dilation seems to be relevant as the magnitude of dilation.