Related Experiment Videos
Retrograde flow in the internal mammary artery
A J Cohen1, J A Ameika, R A Briggs
1Department of Surgery, Brooke Army Medical Center, Fort Sam Houston, TX 78234-6200.
The Annals of Thoracic Surgery
|January 1, 1988
Summary
Retrograde flow in the internal mammary artery (IMA) during coronary artery bypass grafting was evaluated. Results suggest the retrograde IMA technique is not recommended as a primary myocardial revascularization method.
Area of Science:
- Cardiovascular Surgery
- Vascular Biology
Background:
- The internal mammary artery (IMA) is a critical conduit for myocardial revascularization.
- Assessing flow dynamics within the IMA is essential for surgical success.
Purpose of the Study:
- To evaluate the antegrade and retrograde flow characteristics of the left internal mammary artery (IMA) in patients undergoing coronary artery bypass grafting (CABG).
Main Methods:
- Thirty-two patients undergoing CABG were studied.
- The left IMA pedicle was prepared, divided proximally to its bifurcation, and allowed to bleed freely.
- Antegrade and retrograde flow from the divided IMA ends were measured over 30 seconds.
Main Results:
- Mean antegrade flow was 73 +/- 34 ml/min.
- Mean retrograde flow was significantly lower at 25 +/- 17.2 ml/min (p < 0.05).
Conclusions:
- The retrograde IMA technique is not recommended as a primary strategy for myocardial revascularization.
- This technique may be considered in specific cases if sufficient retrograde flow is confirmed prior to anastomosis.