We have located links that may give you full text access.
Effects of intra-aortic balloon pumping on graft flow in coronary surgery: an intraoperative transit-time flowmetric study.
Annals of Thoracic Surgery 2008 September
BACKGROUND: We investigated hemodynamic effects of intra-aortic balloon pumping (IABP) in in-situ and aorta-coronary (A-C) grafts during coronary artery bypass grafting (CABG).
METHODS: One hundred seventy-two grafts, including 84 in-situ left internal thoracic arteries (LITAs), were examined intraoperatively with a transit-time flowmeter in 84 patients who had prophylactic IABP. The following measurements were obtained for each graft during off-IABP and on-IABP: mean flow, maximal flow, pulsatility index, and diastolic filling index. Coronary angiograms were performed 14 +/- 5 days after coronary artery bypass graft surgery to verify the patency of the grafts.
RESULTS: All measurements of 163 patent and measurable grafts were significantly increased with IABP: mean flow 46 +/- 27 to 51 +/- 29 mL/min; maximal flow 87 +/- 52 to 121 +/- 69 mL/min; pulsatility index 2.2 +/- 1.4 to 3.1 +/- 1.4; and diastolic filling index 64% +/- 8% to 71% +/- 9% (p < 0.001). Among them, the degrees of increase of mean flow and diastolic filling index were significantly different between the in-situ LITAs and A-C grafts (mean flow 18% +/- 20% versus 10% +/- 15%, p = 0.04; diastolic filling index 10% +/- 8% versus 14% +/- 9%, p = 0.04).
CONCLUSIONS: IABP assist significantly increases graft flow and also diastolic components of flow. The degree of increase is greater in the in-situ LITA supplying the left anterior descending artery than in A-C grafts anastomosed to other coronary arteries. IABP increases the diastolic component more in A-C grafts than in in-situ LITAs, probably because of different flow characteristics of the two grafts.
METHODS: One hundred seventy-two grafts, including 84 in-situ left internal thoracic arteries (LITAs), were examined intraoperatively with a transit-time flowmeter in 84 patients who had prophylactic IABP. The following measurements were obtained for each graft during off-IABP and on-IABP: mean flow, maximal flow, pulsatility index, and diastolic filling index. Coronary angiograms were performed 14 +/- 5 days after coronary artery bypass graft surgery to verify the patency of the grafts.
RESULTS: All measurements of 163 patent and measurable grafts were significantly increased with IABP: mean flow 46 +/- 27 to 51 +/- 29 mL/min; maximal flow 87 +/- 52 to 121 +/- 69 mL/min; pulsatility index 2.2 +/- 1.4 to 3.1 +/- 1.4; and diastolic filling index 64% +/- 8% to 71% +/- 9% (p < 0.001). Among them, the degrees of increase of mean flow and diastolic filling index were significantly different between the in-situ LITAs and A-C grafts (mean flow 18% +/- 20% versus 10% +/- 15%, p = 0.04; diastolic filling index 10% +/- 8% versus 14% +/- 9%, p = 0.04).
CONCLUSIONS: IABP assist significantly increases graft flow and also diastolic components of flow. The degree of increase is greater in the in-situ LITA supplying the left anterior descending artery than in A-C grafts anastomosed to other coronary arteries. IABP increases the diastolic component more in A-C grafts than in in-situ LITAs, probably because of different flow characteristics of the two grafts.
Full text links
Related Resources
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app