The relation between tissue doppler imaging and the severity of coronary artery stenosis in patients undergoing coronary angiography

Objectives: Early detection of local dysfunction in patients suspected of coronary artery disease (CAD) is usually performed using Tissue Doppler Imaging (TDI). The present study investigated the relationship between TDI and the severity of coronary artery stenosis in hospitalized patients with suspected CAD. Methods: The present study is a descriptive-analytical study. The research population was ۲۰۰ patients hospitalized in Seyyed al-Shohada Hospital, Urmia University of Medical Sciences, undergoing coronary angiography between ۲۰۱۳ and ۲۰۱۸. The patients were divided into three groups- mild, moderate, and severe. All patients underwent echocardiography and color TD. Myocardial performance index (TIE index) was evaluated using Doppler echo. Logistic regression analysis was used to investigate the effect of tissue Doppler indices on the degree of coronary artery involvement. SPSS version ۲۲ software was used for statistical analysis. Results: A total of ۲۰۰ patients, ۱۱۳ (۵۶.۵%) males, were investigated. The age range of participants was between ۲۵ to ۷۸ years. Left ventricular systolic and diastolic function indices and mean velocity E in the three groups were ۰.۷۳ ± ۰.۱۵۸, ۰.۶۸ ± ۰.۱۳۴, and ۰.۶۴ ± ۰.۱۴۵, respectively (P = ۰.۰۲۵). The average velocity A, the average ratio E/A, the MP index, the average velocity e, and the average ratio E/e had significant differences in all the three groups. Conclusions: Due to the significant correlation between numerous left ventricular functional indices, TDI can be used as a non-invasive tool in evaluating coronary arteries.