Intraoperative analysis of flow dynamics in arteriovenous composite y grafts
Rev. bras. cir. cardiovasc
;
31(5): 351-357, Sept.-Oct. 2016. tab, graf
Article
Dans Anglais
| LILACS
| ID: biblio-829758
ABSTRACT
Abstract Objective:
Composite graft of left internal thoracic artery and great saphenous vein in revascularization of the left coronary system is a technique well described in literature. The aim of this study is to analyze blood flow dynamics in this configuration of composite graft especially in what concerns left internal thoracic artery's adaptability and influence of great saphenous vein segment on left internal thoracic artery's flow.Methods:
Revascularization of left coronary system with composite graft, with left internal thoracic artery revascularizing the anterior interventricular artery and a great saphenous vein segment, anastomosed to the left internal thoracic artery, revascularizing another branch of the left coronary system, was performed in 23 patients. Blood flow was evaluated by transit time flowmetry in all segments of the composite graft (left internal thoracic artery proximal segment, left internal thoracic artery distal segment and great saphenous vein segment). Measures were performed in baseline condition and after dobutamine-induced stress, without and with non-traumatic temporary clamping of the distal segments of the composite graft.Results:
Pharmacological stress resulted in increase of blood flow values in the analyzed segments (P<0.05). Non-traumatic temporary clamping of great saphenous vein segment did not result in statistically significant changes in the flow of left internal thoracic artery distal segment, both in baseline condition and under pharmacological stress. Similarly, non-traumatic temporary clamping of left internal thoracic artery distal segment did not result in statistically significant changes in great saphenous vein segment flow.Conclusion:
Composite grafts with left internal thoracic artery and great saphenous vein for revascularization of left coronary system, resulted in blood flow dynamics with physiological adaptability, both at rest and after pharmacological stress, according to demand. Presence of great saphenous vein segment did not alter physiological blood flow dynamics in distal segment of left internal thoracic artery.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Veine saphène
/
Vitesse du flux sanguin
/
Pontage aortocoronarien
/
Fraction du flux de réserve coronaire
/
Anastomose mammaire interne-coronaire
/
Artères mammaires
Type d'étude:
Étude observationnelle
Limites du sujet:
Adulte très âgé
/
Femelle
/
Humains
/
Mâle
langue:
Anglais
Texte intégral:
Rev. bras. cir. cardiovasc
Thème du journal:
Cardiologie
/
Chirurgie générale
Année:
2016
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Universidade Federal do Ceará/BR
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