Intraoperative analysis of flow dynamics in arteriovenous composite y grafts
Rev. bras. cir. cardiovasc
;
31(5): 351-357, Sept.-Oct. 2016. tab, graf
Artículo
en Inglés
| 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.
Texto completo:
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Índice:
LILACS (Américas)
Asunto principal:
Vena Safena
/
Velocidad del Flujo Sanguíneo
/
Puente de Arteria Coronaria
/
Reserva del Flujo Fraccional Miocárdico
/
Anastomosis Interna Mamario-Coronaria
/
Arterias Mamarias
Tipo de estudio:
Estudio observacional
Límite:
Anciano
/
Femenino
/
Humanos
/
Masculino
Idioma:
Inglés
Revista:
Rev. bras. cir. cardiovasc
Asunto de la revista:
Cardiología
/
Cirugía General
Año:
2016
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
Universidade Federal do Ceará/BR
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