Evaluation of the effect of coronary slow flow phenomenon on cardiac functions

Aim: Although coronary slow flow phenomenon (CSFP) is seen in 2% of patients undergoing coronary angiography, its clinical significance and impact on ventricular function remain controversial. Cardiac magnetic resonance imaging (CMR) is the gold standard for evaluating ventricular function and volumes. In this study, we aimed to assess the impact of CSF on ventricular function using CMR-based deformation imaging.Material and Methods: This is a cross-sectional study. Twenty-two people were included in the study. Patients with structural heart disease and secondary coronary slow flow were excluded. Twelve subjects with CSFP and 10 subjects with normal flow and normal cardiac function were compared by CMR and CMR strain.Results: Left ventricle (LV) and right ventricle (RV) functions and volumes were similar. There was no difference between CMR strains in both groups. Furthermore, there was no correlation between age and heart function in patients with CSF.Discussion: CSF has no or limited impact on cardiac functions. Further long-term prospective studies should be carried out to establish the impact and significance of CSF in patients with CSF.