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Okoh, Alexis K; Young, An; Garcia, Mariana; Sullivan, Samaah; Almuwaqqat, Zakaria; Hu, Yingtian; Liu, Chang; Moazzami, Kasra; Uphoff, Irina; Lima, Bruno B; Ko, Yi-An; Elon, Lisa; Jajeh, Nour; Rout, Pratik; Gupta, Shishir; Shah, Amit J; Bremner, J Douglas; Lewis, Tene; Quyyumi, Arshed; Vaccarino, Viola
Psychosomatic medicine, 06/2023, Letnik: 85, Številka: 5Journal Article
This study aimed to investigate differences in transient endothelial dysfunction (TED) with mental stress in Black and non-Black individuals with coronary heart disease (CHD), and their potential impact on cardiovascular outcomes. We examined 812 patients with stable CHD between June 2011 and March 2016 and followed through February 2020 at a university-affiliated hospital network. Flow-mediated vasodilation (FMD) was assessed before and 30 minutes after mental stress. TED was defined as a lower poststress FMD than prestress FMD. We compared prestress FMD, post-stress FMD, and TED between Black and non-Black participants. In both groups, we examined the association of TED with an adjudicated composite end point of cardiovascular death or nonfatal myocardial infarction (first and recurring events) after adjusting for demographic, clinical, and socioeconomic factors. Prestress FMD was lower in Black than non-Black participants (3.7 2.8 versus 4.9 3.8, p < .001) and significantly declined with mental stress in both groups. TED occurred more often in Black (76%) than non-Black patients (67%; multivariable-adjusted odds ratio = 1.6, 95% confidence interval = 1.5-1.7). Over a median (interquartile range) follow-up period of 75 (65-82) months, 142 (18%) patients experienced either cardiovascular death or nonfatal myocardial infarction. Black participants had a 41.9% higher risk of the study outcome than non-Black participants (95% confidence interval = 1.01-1.95). TED with mental stress explained 69% of this excess risk. Among CHD patients, Black individuals are more likely than non-Black individuals to develop endothelial dysfunction with mental stress, which in turn explains a substantial portion of their excess risk of adverse events.
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