Statistical analysis
Statistical analysis was carried out with the SPPS program (version
21.0, SPSS, Chicago, İllinois, USA). All measurements were evaluated
with the Kolmogorov-Smirnov test for normality. A comparison of
continuous variables between the groups was performed using the
Mann-Whitney U test. All continuous variables were expressed as mean ±
standartd deviation values. PLS values were compared to according to
presence of more than 50% stenosis least one vessel. Categorical
variables were analysed using the Chi-square test. Presence of PSS in
each segment were compared according to more than 50% stenosis in
segment related coronary artery. We also evaluated the relation between
presence of PSS of segments and presence of severe coronary artery
disease of at least one vessel. Correlations between coronary artery
disease severity and peak systolic strain for each coronary artery and
its territory was evaluated by a Pearson correlation test where
two-sided P values <0.05 were accepted as statistically
significant