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The prognostic value of coronary endothelial and microvascular dysfunction in subjects with normal or non-obstructive coronary artery disease: A systematic review and meta-analysis

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AIMS: Coronary vascular dysfunction is linked with poor cardiovascular prognosis in patients without obstructive coronary artery disease (CAD) but a critical appraisal of the literature is lacking.

METHODS AND RESULTS: We performed a systematic review and meta-analysis to quantify the cardiovascular risk associated with endothelial dependent and non-endothelial dependent coronary vascular dysfunction in patients with normal or non-obstructive CAD (epicardial stenosis <50%). Prospective cohort studies that reported coronary vascular dysfunction at baseline and cardiovascular outcomes at follow-up were included. We identified 52 papers of which 26 were included in the meta-analyses. Study populations included stable angina (n=15), heart failure (n=4), diabetes (n=2), hypertrophic obstructive cardiomyopathy (n=2), chronic kidney disease, aortic stenosis and left atrial enlargement (each n=1): RR estimates were similar in patients with stable angina and other patient groups. For epicardial endothelial dependent dysfunction (six studies, 243 events in 1192 patients) the summarized RR was 2.38 (95% confidence intervals (95% CI) 1.74-3.25), for non-endothelial dependent dysfunction assessed as coronary flow velocity reserve (CFVR) by echocardiography (10 studies, 428 events in 5134 patients) RR was 4.58 (95% CI 3.58-5.87) and for coronary flow reserve (CFR) by PET (10 studies, 538 events in 3687 patients) RR was 2.44 (95% CI 1.80-3.30). However, RR estimates were robust in a series of sensitivity analyses.

CONCLUSION: The presence of coronary vascular dysfunction in patients with normal or non-obstructive CAD predicts adverse cardiovascular outcome. Multicentre studies and uniform guidelines for assessing coronary vascular dysfunction are encouraged.

Original languageEnglish
JournalInternational Journal of Cardiology
Volume254
Pages (from-to)1-9
ISSN0167-5273
DOIs
Publication statusPublished - Mar 2018

    Research areas

  • Journal Article

ID: 52668159