Effects of postural change on transesophageal echocardiography views and parameters in healthy dogs
Autor: | Tomoki Wada, Ryuji Fukushima, Norio Yamagishi, Miki Shimizu, Daiki Hirao, Ryou Tanaka, Kazumi Shimada, Seijirow Goya |
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Rok vydání: | 2016 |
Předmět: |
Male
medicine.medical_specialty Supine position 040301 veterinary sciences Posture Left Ventricular Ejection Time 030204 cardiovascular system & hematology 0403 veterinary science 03 medical and health sciences 0302 clinical medicine Dogs Afterload medicine.artery Mitral valve Internal medicine Internal Medicine Medicine Animals echocardiography Anesthesia Aorta General Veterinary Full Paper business.industry ultrasound 04 agricultural and veterinary sciences Stroke volume Preload Prone position medicine.anatomical_structure dog Cardiology cardiovascular system Female business Echocardiography Transesophageal |
Zdroj: | The Journal of Veterinary Medical Science |
ISSN: | 1347-7439 |
Popis: | The purpose of the present study is to investigate the effect of postural change on transesophageal echocardiography (TEE) views and parameters of interest anesthesia monitoring in healthy dogs. Twelve Beagle dogs were anesthetized and randomly positioned in one of four postures: right lateral-recumbency, left lateral-recumbency, supine position and prone position. After examinations in one posture, the same examination was demonstrated in another posture and repeated in all postures. In each posture, several standard TEE views were demonstrated: longitudinal cranial-esophageal aorta long-axis-view, transverse middle-esophageal mitral valve long-axis-view and transgastric middle short-axis-view. Additionally, echocardiographic parameters were attempted to measure, and direct blood pressure monitoring was performed in each view. As a result, oriented views, except for transgastric middle short-axis-view, could be obtained in all postures. Stroke volume and peak early diastolic velocity of mitral inflow were lower in supine position compared with those in right and left lateral-recumbency. Heart rate (HR) and systemic vascular resistance were higher in supine position compared with those in right and left lateral-recumbency. Left ventricular pre-ejection period/left ventricular ejection time corrected and uncorrected by HR were higher in supine position compared with those in right and left lateral-recumbency. In conclusion, longitudinal cranial-esophageal aorta long-axis-view and transverse middle-esophageal mitral valve long-axis-view provide useful information of interest anesthesia monitoring, because of their views enable to certainly obtain TEE parameters in various postures. Furthermore, TEE parameters allow to detect the changes of preload, afterload and HR that occur in supine position dogs. |
Databáze: | OpenAIRE |
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