RIMA was slightly larger than LIMA (2.3 mm vs 2.2 mm, P = .042), with smoking and dyslipidemia predicting higher RIMA flow.
Does preoperative Doppler ultrasound assessment reveal significant differences in flow dynamics between the right and left internal mammary arteries in CABG candidates?
Preoperative Doppler assessment shows minimal statistical differences and no clinical disparities between RIMA and LIMA flow dynamics in CABG candidates.
Absolute Event Rate: 0% vs 0%
Background: This study aimed to evaluate the right and left internal mammary artery (RIMA and LIMA) flow dynamics in coronary artery bypass grafting (CABG) candidates using the Doppler ultrasound and explore their associations with clinical and echocardiographic factors. Methods: This prospective observational study enrolled 60 patients scheduled for CABG at Dong Nai General Hospital from January 2023 to December 2024. Doppler ultrasound assessed internal mammary artery (IMA) size, peak systolic velocity (PSV), time-averaged mean velocity (TAMV), flow volume, and atherosclerotic changes. Statistical analyses included paired t-tests, multivariable regression, and correlation analyses. Results: The RIMA was slightly larger than the LIMA (2.3 ± 0.3 mm vs 2.2 ± 0.3 mm, P = .042), with no significant differences in PSV, TAMV, or flow volume. Mean flow volumes were 28.0 ± 12.8 mL/min (RIMA) and 26.2 ± 11.7 mL/min (LIMA). Atherosclerosis was rare (1.7% RIMA, 0% LIMA). Smoking (β = 0.32, P = .014) and dyslipidemia (β = 0.28, P = .029) predicted higher RIMA flow, while age predicted lower LIMA flow (β = −0.35, P = .008). Conclusions: Preoperative Doppler assessment indicated minimal statistical differences but no clinical disparities between the RIMA and LIMA. Individualized preoperative assessment and risk factor optimization remain essential to improve conduit selection and surgical outcomes in CABG.
Vo et al. (Mon,) reported a other. RIMA was slightly larger than LIMA (2.3 mm vs 2.2 mm, P = .042), with smoking and dyslipidemia predicting higher RIMA flow.