Three-dimensional speckle tracking imaging combined with SYNTAX score in evaluating complex coronary artery disease / 中国医学影像技术

ABSTRACT

Objective: To explore the value of three-dimensional speckle tracking imaging (3D-STI) combined with coronary artery SYNTAX scores (SS) in evaluating the left ventricular function of patients with complex coronary artery disease (CAD). Methods: Totally 78 patients with complex CAD were divided into low score subgroup (SS<23, n=26), medium score subgroup (23≤SS<33, n=25) and high score subgroup (SS≥33, n=27) according to SS. The global longitudinal strain (GLS), global circumferential strain (GCS), global radial strain (GRS), global three-dimensional strain (G3DS) and longitudinal strain (LS), radial strain (RS), circumferential strain (CS) as well as three-dimensional strain (3DS) of segments were obtained with 3D-STI. Then LS, RS, CS, 3DS of basal segment, middle segment and apical segment were further calculated. The above indexes were compared among groups. Results: ①GLS, GRS, GCS and G3DS all decreased in turn among low score, medium score and high score subgroups (all P<0.05). LS, 3DS of basal segment, LS, RS, CS and 3DS of middle segment and apical segment also decreased gradually (all P<0.05). ②ROC curve showed that GLS, GRS, GCS and G3DS had a certain value in detecting degrees of complex CAD, and GLS and G3DS had larger AUC. ③GLS, GRS, GCS and G3DS were negatively correlated with SS in the group of complex CAD (r=-0.548, -0.366, -0.411, -0.556, all P<0.05). 3D-STI had good interobserver and intraobserver consistency. Conclusion: 3D-STI can reflect the complexity of coronary artery lesions, which has a certain guiding significance combined with SS in diagnosis and treatment of complex CAD.