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Funding Acknowledgements Type of funding sources: Private grant(s) and/or Sponsorship. Main funding source(s): Rosetrees Trust James Tudor Foundation Background Myocardial infarction with non-obstructive coronary arteries (MINOCA) is an increasingly recognised working diagnosis. Sex and age differences in MINOCA are not well understood. Purpose  This study aims to evaluate the impact of sex and age in patients with MINOCA due to ischaemic and non-ischaemic causes on clinical presentation and outcome. Methods and Results Consecutive patients with a working diagnosis of MINOCA (n = 719) from a single tertiary centre who underwent comprehensive cardiovascular magnetic resonance (CMR) imaging with late gadolinium enhancement (LGE) were followed prospectively. The primary endpoint was all-cause mortality.  CMR was performed at a median time of 30 days after presentation and identified a diagnosis in 74% of patients. Men were more likely to have a non-ischaemic cause on CMR (55% v. 41%, p &amp;lt; 0.001) and less likely to have a normal/non-specific scan (21% v. 32%, p = 0.001, figure 1).  All-cause mortality was 9.5% over a median follow up of 4.9 years, with no significant difference between sexes (8.7% versus 10.1% p = 0.456).  Age group (HR 1.61, p &amp;lt; 0.001) and LVEF (HR 0.98, p = 0.020) were independent predictors of mortality. Men aged &amp;gt;60 years with a non-ischaemic aetiology on their CMR were at higher risk of death than women with non-ischaemic causes &amp;gt;60 years (p = 0.003, figure 2). Conclusions There is no difference in all-cause mortality between sexes in MINOCA but increasing age is the most important predictor of mortality in both sexes.

european heart journal. cardiovascular imaging

Sex and age differences in patients with a working diagnosis of myocardial infarction with non-obstructive coronary arteries (MINOCA): presentation and outcome