Flow dynamic comparison of in-situ internal thoracic and gastroepiploic arterial conduits: Experimental study

Yasunori Iida, Yukio Obitsu, Hiroshi Shigematsu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Objective: We tried to experimentally clarify the flow dynamic differences under flow competitive conditions between the internal thoracic artery (ITA) and gastroepiploic artery (GEA) as in-situ arterial bypass conduits. Methods: The ITA and the GEA were anastomosed close together to the left anterior descending artery (LAD) in 8 pigs. Flow characteristics of the ITA and the GEA were analyzed using a transit time flowmeter under the following flow competitive conditions; condition A: the ITA, GEA and LAD were left open, condition B: either of the ITA or GEA were clamped and the LAD was left open, condition C: the ITA and GEA were open but the proximal LAD was clamped, condition D: either of the ITA or GEA were clamped and the proximal LAD was also clamped. Results: The flow volume of the ITA was significantly (p<0.001) greater than that of the GEA in condition A (27±11 ml/min vs. -4±9 ml/min), B (26±17 ml/min vs. -1±14 ml/min) and C (38±14 ml/nun vs. 0±4 ml/min), but did not differ (p=0.685) in condition D (29±6 ml/min vs. 31±14 ml/min). Retrograde flow in systole and antegrade flow in diastole was seen in the GEA in condition A, B and C. Conclusion: Under flow competitive conditions, flow of the GEA was inferior to that of the ITA. These data suggested that the GEA is more sensitive to competitive flow than the ITA. This may be due to anatomical differences between these in-situ bypass conduits.

Original languageEnglish
Pages (from-to)233-238
Number of pages6
JournalJapanese Journal of Thoracic and Cardiovascular Surgery
Volume54
Issue number6
Publication statusPublished - 2006 Jun
Externally publishedYes

Fingerprint

Gastroepiploic Artery
Mammary Arteries
Thorax
Arteries
Flowmeters
Diastole
Systole

Keywords

  • Coronary artery bypass
  • Flow competition
  • Gastroepiploic artery
  • Internal thoracic artery

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

Cite this

Flow dynamic comparison of in-situ internal thoracic and gastroepiploic arterial conduits : Experimental study. / Iida, Yasunori; Obitsu, Yukio; Shigematsu, Hiroshi.

In: Japanese Journal of Thoracic and Cardiovascular Surgery, Vol. 54, No. 6, 06.2006, p. 233-238.

Research output: Contribution to journalArticle

@article{751b3955c84743ebaeb28991f19774f3,
title = "Flow dynamic comparison of in-situ internal thoracic and gastroepiploic arterial conduits: Experimental study",
abstract = "Objective: We tried to experimentally clarify the flow dynamic differences under flow competitive conditions between the internal thoracic artery (ITA) and gastroepiploic artery (GEA) as in-situ arterial bypass conduits. Methods: The ITA and the GEA were anastomosed close together to the left anterior descending artery (LAD) in 8 pigs. Flow characteristics of the ITA and the GEA were analyzed using a transit time flowmeter under the following flow competitive conditions; condition A: the ITA, GEA and LAD were left open, condition B: either of the ITA or GEA were clamped and the LAD was left open, condition C: the ITA and GEA were open but the proximal LAD was clamped, condition D: either of the ITA or GEA were clamped and the proximal LAD was also clamped. Results: The flow volume of the ITA was significantly (p<0.001) greater than that of the GEA in condition A (27±11 ml/min vs. -4±9 ml/min), B (26±17 ml/min vs. -1±14 ml/min) and C (38±14 ml/nun vs. 0±4 ml/min), but did not differ (p=0.685) in condition D (29±6 ml/min vs. 31±14 ml/min). Retrograde flow in systole and antegrade flow in diastole was seen in the GEA in condition A, B and C. Conclusion: Under flow competitive conditions, flow of the GEA was inferior to that of the ITA. These data suggested that the GEA is more sensitive to competitive flow than the ITA. This may be due to anatomical differences between these in-situ bypass conduits.",
keywords = "Coronary artery bypass, Flow competition, Gastroepiploic artery, Internal thoracic artery",
author = "Yasunori Iida and Yukio Obitsu and Hiroshi Shigematsu",
year = "2006",
month = "6",
language = "English",
volume = "54",
pages = "233--238",
journal = "General Thoracic and Cardiovascular Surgery",
issn = "1863-6705",
publisher = "Springer Japan",
number = "6",

}

TY - JOUR

T1 - Flow dynamic comparison of in-situ internal thoracic and gastroepiploic arterial conduits

T2 - Experimental study

AU - Iida, Yasunori

AU - Obitsu, Yukio

AU - Shigematsu, Hiroshi

PY - 2006/6

Y1 - 2006/6

N2 - Objective: We tried to experimentally clarify the flow dynamic differences under flow competitive conditions between the internal thoracic artery (ITA) and gastroepiploic artery (GEA) as in-situ arterial bypass conduits. Methods: The ITA and the GEA were anastomosed close together to the left anterior descending artery (LAD) in 8 pigs. Flow characteristics of the ITA and the GEA were analyzed using a transit time flowmeter under the following flow competitive conditions; condition A: the ITA, GEA and LAD were left open, condition B: either of the ITA or GEA were clamped and the LAD was left open, condition C: the ITA and GEA were open but the proximal LAD was clamped, condition D: either of the ITA or GEA were clamped and the proximal LAD was also clamped. Results: The flow volume of the ITA was significantly (p<0.001) greater than that of the GEA in condition A (27±11 ml/min vs. -4±9 ml/min), B (26±17 ml/min vs. -1±14 ml/min) and C (38±14 ml/nun vs. 0±4 ml/min), but did not differ (p=0.685) in condition D (29±6 ml/min vs. 31±14 ml/min). Retrograde flow in systole and antegrade flow in diastole was seen in the GEA in condition A, B and C. Conclusion: Under flow competitive conditions, flow of the GEA was inferior to that of the ITA. These data suggested that the GEA is more sensitive to competitive flow than the ITA. This may be due to anatomical differences between these in-situ bypass conduits.

AB - Objective: We tried to experimentally clarify the flow dynamic differences under flow competitive conditions between the internal thoracic artery (ITA) and gastroepiploic artery (GEA) as in-situ arterial bypass conduits. Methods: The ITA and the GEA were anastomosed close together to the left anterior descending artery (LAD) in 8 pigs. Flow characteristics of the ITA and the GEA were analyzed using a transit time flowmeter under the following flow competitive conditions; condition A: the ITA, GEA and LAD were left open, condition B: either of the ITA or GEA were clamped and the LAD was left open, condition C: the ITA and GEA were open but the proximal LAD was clamped, condition D: either of the ITA or GEA were clamped and the proximal LAD was also clamped. Results: The flow volume of the ITA was significantly (p<0.001) greater than that of the GEA in condition A (27±11 ml/min vs. -4±9 ml/min), B (26±17 ml/min vs. -1±14 ml/min) and C (38±14 ml/nun vs. 0±4 ml/min), but did not differ (p=0.685) in condition D (29±6 ml/min vs. 31±14 ml/min). Retrograde flow in systole and antegrade flow in diastole was seen in the GEA in condition A, B and C. Conclusion: Under flow competitive conditions, flow of the GEA was inferior to that of the ITA. These data suggested that the GEA is more sensitive to competitive flow than the ITA. This may be due to anatomical differences between these in-situ bypass conduits.

KW - Coronary artery bypass

KW - Flow competition

KW - Gastroepiploic artery

KW - Internal thoracic artery

UR - http://www.scopus.com/inward/record.url?scp=33746227549&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33746227549&partnerID=8YFLogxK

M3 - Article

C2 - 16813103

AN - SCOPUS:33746227549

VL - 54

SP - 233

EP - 238

JO - General Thoracic and Cardiovascular Surgery

JF - General Thoracic and Cardiovascular Surgery

SN - 1863-6705

IS - 6

ER -