The effects of isoflurane anaesthesia on some Doppler-derived cardiac parameters in the common buzzard (Buteo buteo)

Straub, J; Forbes, Neil; Thielebein, Jens; Pees, Michael; Krautwald-Junghanns, M.-E.

doi:10.1016/s1090-0233(03)00074-1

Cited by 18 publications

(23 citation statements)

References 5 publications

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“…In this study, there was no significant decrease in HR from the awake to the anaesthetized state under isoflurane. This absence of a significant reduction in HR was also observed in a study conducted in crested caracaras (Escobar et al 2011), whereas HR was found to be significantly lower in other studies carried out in anaesthetized common buzzards (Straub et al 2003) and thick-billed parrots (Mercado et al 2008).…”

Section: Discussionsupporting

confidence: 68%

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Cardiorespiratory parameters in the awake pigeon and during anaesthesia with isoflurane

Botman

Dugdale

Gabriel

et al. 2016

Veterinary Anaesthesia and Analgesia

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Section: Discussionsupporting

confidence: 68%

“…), whereas HR was found to be significantly lower in other studies carried out in anaesthetized common buzzards (Straub et al. ) and thick‐billed parrots (Mercado et al. ).…”

Section: Discussionmentioning

confidence: 66%

Cardiorespiratory parameters in the awake pigeon and during anaesthesia with isoflurane

Botman

Dugdale

Gabriel

et al. 2016

Veterinary Anaesthesia and Analgesia

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“…In our study, anesthesia with isoflurane had a significant influence on the diastolic velocities of pigeons and led mainly to reduced diastolic blood flow velocities, especially of the A wave velocities, and to a changed E to A wave ratio in the left heart. This influence of anesthesia has also been described in mammals [26,38] and in other birds [12,27]. Peak flow velocities are sensitive indexes of myocardial contractility [38].…”

Section: Discussionmentioning

confidence: 60%

“…In small animal medicine, the influence of anesthesia on cardiac parameters has been well described [19][20][21][22][23][24][25][26]. Little is known about the influence of isoflurane on Doppler-derived blood flow velocities, flow pattern, and myocardial or heart valve functions in avian species [27]. The aim of the present study is to examine the ventricular filling during the diastole and to evaluate the possible influence of isoflurane anesthesia on these blood flow velocities and the AV function of the heart in racing pigeons measured by pulsed-wave (PW) Doppler sonography.…”

Section: Introductionmentioning

confidence: 99%

Differences between the Filling Velocities of the Left and Right Heart Ventricle in Racing Pigeons (Columba livia F. Domestica) and the Influence of Anesthesia with Isoflurane

Legler

Koy

Kummerfeld

et al. 2019

Veterinary Sciences

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The ventricular filling velocities during diastole and the influence of isoflurane anesthesia on these blood flow velocities of the racing pigeon (n = 43) are evaluated by pulsed-wave (PW) Doppler sonography. Sonographic examination demonstrates an early passive ventricular (E wave) and late active (A wave) ventricular filling. The results indicate differences between the two heart ventricles. Especially, the E wave velocity of the right heart is significantly lower than in the left heart, which is explained by the crescent-shaped cavity of the right ventricle around the left ventricle. The faster active filling velocities are significantly influenced by heart rate in conscious birds. Anesthesia with isoflurane leads to a significant decrease of the diastolic blood flow velocities, and the A wave velocities of both ventricles are especially influenced. Anesthesia with isoflurane induces a high incidence of insufficiencies of the left atrioventricular valve in the preejection period. These observations indicate that a contraction of the left ventricle myocardium is important for a complete valvular closure and for normal functioning of this heart valve. The effective closure of the right atrioventricular muscle valve in anesthetized pigeons supports the observation of the fast innervation of this muscle valve via a direct connection to the right atrium.

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“…Doppler flow imaging is an important tool in human and small animal cardiology to visualize and measure blood flow in the heart, to detect turbulent flow, and to diagnose pathological conditions [ 10 , 11 , 12 , 13 ]. In avian medicine Doppler sonographic techniques are also used to visualize and estimate blood flow in the heart [ 3 , 4 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. In particular, color flow Doppler imaging is used in avian medicine to visualize heart valve insufficiencies, aneurysm, and atrial or ventricular septal defects [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Color Flow Doppler Echocardiography in Healthy Racing Pigeons (Columba livia f. domestica) and the Evidence of Physiological Blood Flow Vortex Formations

Legler

Koy

Kummerfeld

et al. 2020

Veterinary Sciences

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In avian medicine, Doppler sonographic techniques are used to visualize and estimate blood flow in the heart. In the literature there is a lack of standardized studies of the use of color Doppler flow on healthy avian species. For this purpose, we examined blood flow in the heart in the four-chamber view of clinically healthy awake racing pigeons (n = 43) by color flow Doppler sonography. With this technique the diastolic and systolic blood flow in the heart chambers and the heart valve regions were well visualized. However, the pulse repetition frequency must be adapted to the specific blood flow velocities of the heart region to be measured to reduce aliasing in higher velocities and to visualize blood flow of lower velocities. With the help of color Doppler imaging in the four-chamber view, typical physiological atrial and ventricular blood flow vortex formations were visualized in the avian heart for the first time. In the left ventricle an asymmetric vortex ring in the passive and active ventricular filling, in the right ventricle a great counter-clockwise blood vortex in the active ventricular filling, in the left atrium a vortex clockwise, and in the right atrium counter-clockwise were observed. The knowledge of these physiological blood flow vortices is important to identify pathological blood flow.

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The effects of isoflurane anaesthesia on some Doppler-derived cardiac parameters in the common buzzard (Buteo buteo)

Cited by 18 publications

References 5 publications

Cardiorespiratory parameters in the awake pigeon and during anaesthesia with isoflurane

Cardiorespiratory parameters in the awake pigeon and during anaesthesia with isoflurane

Differences between the Filling Velocities of the Left and Right Heart Ventricle in Racing Pigeons (Columba livia F. Domestica) and the Influence of Anesthesia with Isoflurane

Color Flow Doppler Echocardiography in Healthy Racing Pigeons (Columba livia f. domestica) and the Evidence of Physiological Blood Flow Vortex Formations

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