Evaluation of right ventricular deformations after coronary artery
bypass graft surgery
Abstract
Introduction: Coronary artery bypass graft (CABG) surgery is a common
therapeutic intervention performed in patients with coronary artery
disease. However, this operation has several postoperative
complications; One of the most common complications after CABG surgery
is right ventricular dysfunction. Therefore, the aim of this study is to
evaluate RV deformations indices after CABG surgery. Methods: This
cross-sectional study was performed from 2019 to 2020 in the cardiac
surgery ward of Farshchian Hospital in Hamadan. 40 patients with cardiac
ischemia were studied as single vessel disease (SVD), two vessels
disease (2VD) and three vessels disease (3VD) who were candidates for
CABG surgery. All patients underwent color and tissue Doppler
echocardiography and Strain RV imaging, before and one month after CABG.
Data analysis was performed using SPSS version 21 and a p-value less
than 0.05 was considered statistically significant. Results: Among 40
patients (32 males and 8 female), the average age was 65.17 (SD 7.87)
and average body mass index was 25.59 (SD 3.20). 4 patients underwent
off-pump CABG surgery. Mean LVEF, SPAP, and RV diameter one month after
CABG significantly increased compared with pre-surgery and TDI (SM),
Strain RV (GLS), FAC, MPI RV, and TAPSE were decreased, which was less
in the group B (3VD) than the first group (P <0.001). There
was no significant difference between RVDD and LVDD before and one month
after CABG (P> 0.05). No significant correlation
coefficient was observed between Strain RV changes and pump time.
Conclusion: Changing the right ventricular geometry after CABG, leads to
reduction of Longitudinal deformation while maintaining overall RV
function. Therefore, it is recommended to consider lower normal values
for these indices after CABG to be taken.