Investigating the relationship between opium use and coronary slow flow: a propensity score matched case-control study

Recent studies have suggested a potential link between opium consumption and microvascular dysfunction in coronary arteries, which may contribute to the development of coronary slow-flow syndrome. This study aims to investigate the relationship between opium use and coronary slow-flow syndrome. This retrospective study analysed medical records of patients who underwent coronary angiography at the Tehran Heart Center from 2006 to 2020. It focused on those with coronary slow flow phenomenon (CSFP) or non-obstructive coronary artery disease, excluding patients with significant left ventricular dysfunction (left ventricular ejection fraction