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1.
对新生荷斯坦犊牛心脏左心室的结构进行了观测。结果 :左心室内肉柱多集中在两乳头肌下部至心尖的中隔面上 ,心室侧壁上也有肉柱 ,主动脉半月瓣结的出现率为 61 5 4% ;流入道、流出道长度分别为 ( 6 84± 0 5 7)cm和 ( 7 41± 0 61)cm ;左心室侧壁和室间隔厚度分别为 ( 1 14± 0 14 )cm和 ( 1 41± 0 15 )cm ;左房室口和主动脉口周径分别为 ( 5 11± 0 76)cm和 ( 4 2 9± 0 60 )cm。 相似文献
2.
Echocardiographic Estimates of Right Ventricular Systolic Function in Dogs with Myxomatous Mitral Valve Disease 
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下载免费PDF全文 E.H. Chapel B.A. Scansen K.E. Schober J.D. Bonagura 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2018,32(1):64-71
Background
Right ventricular (RV) dysfunction independently predicts outcomes in human myxomatous mitral valve disease (MMVD). There is limited information regarding RV systolic function in dogs with MMVD.Hypothesis
Right ventricular systolic function differs among stages of disease, decreasing in decompensated MMVD.Animals
Thirty‐sixclient‐owned dogs with MMVD not receiving oral cardiovascular medications.Methods
Prospective clinical study. Dogs were categorized according to disease severity as ACVIM Stage B1, B2, or C. Seven echocardiographic indices of RV systolic function were measured. Groups were compared by 1‐way ANOVA and Tukey's HSD test. Frequencies of cases with cardiac remodeling falling outside previously established reference intervals were compared using Fisher's exact test. Intra‐ and interobserver measurement variability was calculated for each RV function index.Results
The indices TAPSE (P = 0.029), RV StL (P = 0.012), and RV StRL (P = 0.041) were significantly different between groups. A greater proportion of B2 dogs (7 of 12) had TAPSE values above reference intervals compared with B1 (2 of 12) or C (2 of 12) dogs (P = 0.027). Measurement variability of TAPSE, RV S', and RV StG was clinically acceptable.Conclusions and Clinical Importance
Right ventricular systolic function differs between stages of MMVD, increasing in stage B2, and declining in stage C. The prognostic importance of RV function indices, particularly TAPSE, might be worth evaluating in dogs with MMVD. 相似文献3.
扫描电镜观察结果表明,鸡第三脑室的室管膜有构造分区。视前隐窝有密集的纤毛和徽绒毛,且呈均匀分布。由第三脑室侧壁的背侧向腹侧过渡,纤毛密度逐渐增加。漏斗隐窝的结构最复杂,是多纤毛区、少纤毛区、无纤毛区和伸张细胞区交错排列形成的嵌合体,并分布有大量的泡状结构。存在于侧壁的室旁器的结构特征为表面分布有大量的室管膜上神经纤维。伸张细胞仅存在于漏斗区,互相排列成蜂窝状,表面分布有少量分泌小泡和微绒毛。在鸡第三脑室的各部均发现了神经元样细胞、神经胶质样细胞和类组织细胞。 相似文献
4.
MATTHIAS DENNLER EVA-MARIA LANGE OLIVER SCHMIED BARBARA KASER-HOTZ 《Veterinary radiology & ultrasound》2007,48(2):138-140
A 9-year-old male Appenzeller mountain dog had progressive severe ataxia and central vestibular syndrome that was localized clinically to the brain stem. The cerebrospinal fluid characteristics were suggestive of hemorrhage into the subarachnoid space. On computed tomography (CT), hyperattenuating masses were found in the left lateral ventricle extending into the cerebrum, and another involving the cerebellum and brainstem. The hyperattenuation of the masses in noncontrast images and the absence of contrast enhancement were consistent with hemorrhage. The dog underwent euthanasia. A metastatic hemangiosarcoma in the brain, causing acute bleeding in the left lateral ventricle and the brainstem, was found. A solitary mass in the left myocardium was thought to be the primary site. CT characteristics of intracranial hemorrhage are reviewed. 相似文献
5.
用HRP法研究了猪左心室外侧壁的交感神经节后神经元的分布,结果表明:标记细胞位于左侧颈中神经节、右侧椎神经节、双侧颈胸神经节及第二至第四胸交感神经节。标记细胞以颈胸节最多,占59.4％。左侧出现的标记细胞数明显多于右侧。标记细胞为多突起的星形运动神经元,以直径20～30μ为主,占67％。颈胸神经节内的标记细胞,大部分位于节的前腹侧部。颈前神经节内未发现标记细胞。 相似文献
6.
对２２例右心室心肌梗塞（ＲＭＩ）患者住院期的心电图作连续观察，发现多数仅累及Ｖ３Ｒ、Ｖ４Ｒ两个导联；相应导联病理性Ｑ波出现率占６８；２％，多数表现为ＱＳ、Ｑｒ、ＱＲ，其次为ｑＲ、ｑｒ；ＳＴ段抬高１～２ｍｍ占８１．１％，起病４８、７２小时内分别有７７．３％和９０．９％的病例ＳＴ段回到等电位线；Ｔ波多在４８小时内变为倒置，极少形成冠状Ｔ波。结果表明ＲＭＩ的心电图没有单纯性左室梗塞（ＳＬＭＩ）典型，演变快，提示梗塞范围小且程度较轻。 相似文献
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8.
Vaccination and triploidy increase relative heart weight in farmed Atlantic salmon,Salmo salar L. 下载免费PDF全文
下载免费PDF全文 T W K Fraser I Mayer T Hansen T T Poppe J E Skjæraasen E O Koppang P G Fjelldal 《Journal of fish diseases》2015,38(2):151-160
Heart morphology is particularly plastic in teleosts and differs between farmed and wild Atlantic salmon. However, little is known about how different culture practices and sex affect heart morphology. This study investigated how vaccination, triploidy and sex affected heart size and heart morphology (ventricle shape, angle of the bulbus arteriosus) in farmed Atlantic salmon for 18 months following vaccination (from c. 50–3000 g body weight). In addition, hearts were examined histologically after 7 months in sea water. All fish sampled were sexually immature. Vaccinated fish had significantly heavier hearts relative to body weight and a more triangular ventricle than unvaccinated fish, suggesting a greater cardiac workload. Irrespective of time, triploids had significantly heavier hearts relative to body weight, a more acute angle of the bulbus arteriosus and less fat deposition in the epicardium than diploids. The ventricle was also more triangular in triploids than diploids at seawater transfer. Sex had transient effects on the angle of the bulbus arteriosus, but no effect on relative heart weight or ventricle shape. From a morphological perspective, the results indicate that vaccination and triploidy increase cardiac workload in farmed Atlantic salmon. 相似文献
9.
Marcela Wolf Stephany B. Lucina Bruna C. Brüler Giovana L.R. Tuleski Vinícius B.C. Silva Marlos G. Sousa 《Journal of Veterinary Cardiology》2018,20(3):175-185
Introduction
Left ventricular systolic function is one of the main parameters studied in echocardiography. Longitudinal systolic function, however, is less commonly evaluated in routine examinations but may provide early information on systolic dysfunction. The movement of the mitral annulus toward the apex has already been determined as a method for evaluation of longitudinal systolic function in dogs, but the study of this movement by speckle tracking with the tissue motion annular displacement (TMAD) technique has not yet been evaluated.Animals
One hundred fifty-three client-owned healthy dogs.Methods
Cross-sectional study. One hundred fifty-three client-owned healthy dogs underwent physical examination, electrocardiography, blood pressure measurement, and a standard and speckle tracking echocardiography. Systolic function was evaluated by global longitudinal strain (GLS) and TMAD. These parameters were compared with the standard echocardiographic data.Results
A correlation was found between GLS, TMAD, and body weight. Tissue motion annular displacement and GLS were significantly correlated (p < 0.001) with other surrogates of systolic function, including ejection fraction and fractional shortening. There were no differences in TMAD between sexes. The coefficient of variation (CV) of the intraobserver evaluation in the global TMAD (CV 4.44) was slightly higher than that in the GLS (CV 3.74). Also, TMAD was not influenced by heart rhythm and could be acquired more rapidly than GLS.Conclusions
Tissue motion annular displacement is a rapid and reproducible method for the assessment of left ventricle longitudinal function in healthy dogs. However, more studies are needed to validate the real clinical applicability of TMAD in animals with heart diseases. 相似文献10.
Chloe Touzet Harriet Hahn Eymeric Gomes Camille Bismuth Kevin Le Boedec 《Veterinary radiology & ultrasound》2023,64(2):183-193
The gold standard for diagnosis of laryngeal paralysis is laryngoscopy under light anesthesia. This prospective analytical cross-sectional study aimed to determine whether a radiographic assessment of the larynx could be used as a non-invasive screening tool for diagnosing laryngeal paralysis in non-sedated animals, as the laryngeal ventricles may appear wider in affected animals. The laryngeal ventricles of 18 dogs with bilateral laryngeal paralysis composing the affected group and 25 non-sedated dogs presenting no respiratory abnormality composing the control group were evaluated using right lateral radiography of the larynx. Three observers measured the ratios of the maximal ventricular length and surface to the body length of the third cervical vertebra (MVL/LC3 and VS/LC3, respectively). They also subjectively assessed the ventricular shape as either normal or rounded. The most accurate criterion was found to be MVL/LC3, as the respective areas under the ROC curves were 0.96 (95% confidence interval [CI]: 0.95–0.97), 0.89 (95% CI: 0.87–0.91), 0.80 (95% CI: 0.65–0.95) for MVL/LC3, VS/LC3, and ventricular shape evaluation, respectively. Based on ROC curve analysis, two thresholds of clinical interest were set for the MVL/LC3; bilateral laryngeal paralysis was very unlikely for values < 0.3 and very likely for values > 0.5. The findings of this study support the use of lateral laryngeal radiography as a screening tool for diagnosing bilateral laryngeal paralysis. However, further diagnostic tests remain required if MVL/LC3 lies between these threshold values or if clinically indicated. Further studies are warranted to explore the use of laryngeal radiography in unilateral paralysis and other laryngeal or oropharyngeal diseases. 相似文献