Effects of Respiratory Cycle on Pulmonary Venous Flow and Cardiac Cycle on Pulmonary Venous Diameter of Dogs: A Transesophageal Echocardiography Study

Journal of Veterinary Medical Science

Chiang-Hua CHIANG¹  Shozo OKANO¹  Mitsuyoshi HAGIO² 

[1] Department of Small Animal Medicine, Faculty of Veterinary Medicine and Animal Sciences, Kitasato University, Higashi 23-35-1, Towada, Aomori 034-8628, Japan;Veterinary Surgery Laboratory, Faculty of Agriculture, Miyazaki University, Gakuen Kibana-dai Nishi, Miyazaki-shi, 889-2192, Japan

关键词: canine;    pulmonary venous diameter;    pulmonary venous flow;   

DOI  :  10.1292/jvms.61.155

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(14)Cited-By(9)We investigated 12 anesthetized normal dogs using transesophageal echocardiography to understand the effects of respiration on the pulmonary venous flow. Additionally, we observed whether the diameter of the pulmonary vein changes with the heart beat. The pulsed Doppler wave form of pulmonary venous flow predominantly demonstrated two backward flows, with one peak occurring during ventricular systole and another during ventricular diastole. Sometimes a small forward flow occurred during left atrial contraction. In comparison with expiration, the peak velocity and velocity-time integral of the flow wave under inspiration occurred during both systole and diastole were significantly smaller. The diameter of the pulmonary vein decreased during left atrial contraction and increased during left ventricular systole and diastole.

【 授权许可】

Unknown