Introduction: Tissue deformation imaging enables the objective assessment of regional myocardial deformation assessed by ultrasound-based strain and strain rate. There are two ways to compute myocardial deformation (strain) using echocardiography: One-dimensional tissue Doppler (DTI)-derived strain and two-dimensional (2D) strain derived from B-mode images (speckle tracking, 2D-ST). This study compares the myocardial deformation parameter (i.e., strain) by these two techniques in the perioperative period using transesophageal echocardiography (TEE) in patients undergoing surgery for coronary artery bypass graft (CABG).
Materials and methods: We performed preoperative global longitudinal strain (GLS) of left ventricle (LV) using 2D-ST and DTI, three-dimensional (3D) left ventricular ejection fraction (LVEF) and 2D LVEF in a consecutive series of 50 adult patients scheduled for on-pump CABG.
Result: There was no difference between 2D and 3D LVEF (p < 0.0001), GLS using 2D-ST and DTI (p-value = 0.0005). The 3D LVEF correlated well with GLS using 2D-ST (r = 0.54, p < 0.0001) and less with tissue Doppler-derived GLS (r = 0.35, p-value = 0.0131).
Conclusion: The LV GLS calculated using 2D-ST correlates well with LV GLS derived from DTI using TEE. The LV GLS also correlated well with the 3D LVEF.
Keywords: Global longitudinal strain, Speckle tracking, Three-dimensional transesophageal echocardiography, Tissue doppler strain, Transesophageal echocardiography.
How to cite this article: Kumar A, Mandal B, Raj R, Bhat I. Comparison of Two Different Methods of obtaining Strain by Perioperative Transesophageal Echocardiography in Patients undergoing Coronary Artery Bypass Graft Surgery: A Prospective Observational Study. J Perioper Echocardiogr 2016;4(2):37-44.
Source of support: This study was partially supported by the Society of Transesophageal Echocardiography Research Fellowship, awarded to Dr Alok Kumar. Clinical-Trials.gov ID: NCT02692131.
Conflict of interest: None