[Structural and hemodynamic study of right ventricular outflow tract reconstruction with valved bovine jugular vein conduit in the canine model by color Doppler echocardiography].
OBJECTIVE
To observe the structural and hemodynamic changes after the reconstruction of right ventricular outflow tract (RVOT) with valved bovine jugular vein conduit (BJVC) in the canine model by color Doppler echocardiography (UCG).


METHODS
BJVC was used in the reconstruction of RVOT of 32 canines. UCG was used to observe the structure of the right ventricle and RVOT. The structure and hemodynamics were observed, and the diameter, width, blood velocity and pressure gradient (PG) were measured between the right ventricle and the conduits.


RESULTS
In the first stage, UCG showed that PG between the right ventricle and BJVC was high in 5 canines, and a few anastomosis in BJVCs with main pulmonary artery was small. Blood velocity quickened and PG increased, and color Doppler showed that the bloodstream was very bright. In the second stage, 7 canines survived for 1 year after the implantation. One year after the operation, UCG showed that the valve closed well, no graft kinking or obvious regurgitation of the valve was observed. The PG of the valve was low. The BJVCs were unobstructed and there was no thrombus.All the valves of BJVC opened well except one. In the third stage, 20 canines survived for 1 year after the implantation. UCG showed that the valve motion was good, no graft kinking or obvious regurgitation of the valve was observed. No neoplasm was observed.


CONCLUSIONS
UCG is one of the most useful measurements in the structural and hemodynamic study of RVOT reconstruction by BJVC in the canine model. The good evaluation of UCG implies that it is important for the study and clinical practice.
Xu
Xin-Hua
XH
Department of Echocardiography, Second Xiangya Hospital, Central South University, Changsha 410011, China.
Wu
Zhong-Shi
ZS
Yin
Bang-Liang
BL
Hu
Jian-Guo
JG
Yang
Yi-Feng
YF
D000818:Animals; D001807:Blood Vessel Prosthesis; D002417:Cattle; D004285:Dogs; D018618:Echocardiography, Doppler, Color; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging* / Q000601:surgery; D006439:Hemodynamics; D007601:Jugular Veins / Q000000981:diagnostic imaging* / Q000637:transplantation; D008297:Male; D011651:Pulmonary Artery / Q000000981:diagnostic imaging / Q000601:surgery