scholarly journals Comparison of Two Different Methods of obtaining Strain by Perioperative Transesophageal Echocardiography in Patients undergoing Coronary Artery Bypass Graft Surgery: A Prospective Observational Study

2016 ◽  
Vol 4 (2) ◽  
pp. 37-44
Author(s):  
Banashree Mandal ◽  
Ravi Raj ◽  
Alok Kumar ◽  
Imran Bhat
Keyword(s):  
Coronary Artery ◽  
Coronary Artery Bypass Graft ◽  
Transesophageal Echocardiography ◽  
Coronary Artery Bypass ◽  
Artery Bypass ◽  
Bypass Graft ◽  
Tissue Doppler ◽  
Myocardial Deformation ◽  
P Value ◽  
Artery Bypass Graft

ABSTRACT 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. 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.

Role of Intraoperative Transesophageal Echocardiography in Patients Having Coronary Artery Bypass Graft Surgery

2004 ◽  
Vol 78 (5) ◽  
pp. 1586-1590 ◽  
Author(s):  
Fatema E. Qaddoura ◽  
Martin D. Abel ◽  
Karen L. Mecklenburg ◽  
Krishnaswamy Chandrasekaran ◽  
Hartzell V. Schaff ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Coronary Artery Bypass Graft ◽  
Transesophageal Echocardiography ◽  
Coronary Artery Bypass ◽  
Artery Bypass ◽  
Bypass Graft ◽  
Artery Bypass Graft ◽  
Intraoperative Transesophageal Echocardiography

scholarly journals Protocol for a retrospective, comparative effectiveness study of the association between transesophageal echocardiography (TEE) monitoring used in coronary artery bypass graft (CABG) surgery and clinical outcomes

2020 ◽  
Author(s):  
Emily J. Mackay ◽  
Bo Zhang ◽  
Siyu Heng ◽  
Ting Ye
Keyword(s):  
Coronary Artery ◽  
Coronary Artery Bypass Graft ◽  
Transesophageal Echocardiography ◽  
Clinical Outcomes ◽  
Coronary Artery Bypass ◽  
Comparative Effectiveness ◽  
Artery Bypass ◽  
Bypass Graft ◽  
Artery Bypass Graft ◽  
Cabg Surgery

AbstractBackgroundCoronary artery bypass graft (CABG) surgery is the most widely performed adult cardiac surgery in the US. Transesophageal echocardiography (TEE) is an ultrasound-based cardiac imaging modality used in CABG surgery for hemodynamic monitoring and management of complications related to cardiopulmonary bypass. However, there are no comparative effectiveness studies (randomized or non-randomized) that have investigated the relationship between TEE monitoring and clinical outcomes among patients undergoing CABG surgery. Because of this lack of evidence, recommendations for TEE in CABG surgery remain indeterminate (Class II). We aim to compare the clinical outcomes of patients undergoing CABG surgery with vs without TEE monitoring. This protocol will detail how we plan to investigate the hypothesis that TEE monitoring in CABG surgery will be associated with improved clinical outcomes.Methods and AnalysisThis investigation will be an observational retrospective, comparative effectiveness, cohort study using Centers for Medicare and Medicaid Services (CMS) claims data from January 1, 2013 to October 15, 2015. The aim is to determine if TEE monitoring during CABG surgery is associated with improved 30-day survival, lower incidence of stroke, shorter length of hospitalization, and incidence of esophageal perforation. To alleviate the potential bias from unmeasured confounding, we propose leveraging hospitals’ (or surgeons’) preference for TEE in CABG surgery as an instrumental variable (IV). We will combine this IV technique with statistical-matching-based methods by pairing hospitals (or surgeons) with similar observed confounding variables but considerably different preference for TEE monitoring in CABG surgery. Our research design is meant to emulate a cluster-randomized encouragement experiment. The following a priori protocol will detail how we plan to execute this analysis.

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