Reproduction Management of Herds/Flocks of Exotic Animals: Investigating Breeding Failures in Birds,Reptiles, and Small Mammals     

《Veterinary Clinics of North America: Exotic Animal Practice》2021,24(3):661-695

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频域心电图对冠心病诊断价值的初步探讨     

梁海华  吴梅丽 《湛江医学院学报》1994,12(4):314-316

对５０例冠心病和５０例随机做平板运动试验（ＴＥＴ）者作频域心电图（ＦＣＧ）对比分析探讨ＦＣＧ对冠心病的诊断价值。结果表明：单纯根据ＦＣＧ异常诊断冠心病有较高假阳性（６５．２２％）。如将ＦＣＧ的阳性指标作综合判断，虽然敏感性降低（８８．００％降至７０．００％）。假阳性都明显降低（６５．２２％降至２６．００％）。认为ＴＥＴ的特异性较ＦＣＧ高。若两者均为阴性，则冠心病可能性很小。  相似文献   

BACTERIAL ENDOCARDITIS WITH THROMBUS FORMATION AND ABSCESSATION IN A HORSE     

Melissa trogdon  Hines  DVM  PhD  Jerry R.  Heidel  DVM  PhD  David D.  Barbee  DVM  MS 《Veterinary radiology & ultrasound》1993,34(1):47-51

A 2.5 year old Appaloosa stallion with progressive weight loss and a heart murmur was diagnosed as having vegetative endocarditis of the right atrioventricular valves with a mass in the right atrium. The ultrasonographic appearance of the lesion was characterized by extreme reverberation. On postmortem examination, a 9 cm diameter thrombus was found within the right atrium and auricle, occupying approximately 80% of the chamber volume. Additionally, a lenticular abscess extended throughout the parietal cusp of the right atrioventricular valve. Histologic examination revealed that the lesions were septic with numerous gram positive cocci in short chains, suggestive of Streptococcus equi , and gram negative rods.  相似文献   

Application of Airway Pressure Therapy in Veterinary Critical Care: Part I: Respiratory Mechanics and Hypoxemia     

Deborah R. Van  Pelt DVM  MS    Wayne E. Wingfield MS  DVM    Timothy B. Hackett DVM  Linda G Martin  DVM 《Journal of Veterinary Emergency and Critical Care》1993,3(2):63-70

Over the past several decades, recognition of acute respiratory failure as the cause of death in patients suffering from various clinical conditions has prompted aggressiv investigation into the area of respiratory physiology and supportive respiratory care. With the evolution of emergency medicine and critical care services in both human and veterinary medicine, many patients previously considered unsalvageable due to the severity of their underlying disease are now being resuscitated and successfully supported, creating a new population of critically ill patients. Where only a decade ago these patients would have succumbed to their underlying disease, they now survive long enough to manifest the complications of shock and tissue injury in the form of acute respiratory failure. Investigation into the pathophysiology and treatment of this acute respiratory distress syndrom (ARDS) has facilitated increased clinical application of respiratory theerapy and machanical ventilation.¹ The purpose of this paper is to provide a basic review of respiratory mechanics and the pathophysiology of hypoxemia as they relate to airway pressure therapy in veterinary patients and to review the use of airway pressure therapy in veterinary patients This paper is divided into two parts; part I reviews respiratory mechanics and hypoxemia as they apply to respiratory therapy, while part II deals specifically with airway pressure therapy andits use in clinical cases.  相似文献   

北京鸭心迷走节前神经元的定位——HRP法研究     

陈耀星 《中国农业大学学报》1991,(3):118-121

本研究用 HRP 逆行追踪法对北京鸭心脏各区的迷走节前神经元胞体进行定位。标记细胞呈双侧性,集中在疑核和迷走背核,以疑核占优势(占68.4%)。在疑核,标记细胞多位于闩的嘴侧(峰值在+1000～+1800 μm水平),为较大型(φ20～30 μm)、多突起的星形细胞。在迷走背核,标记细胞呈梭形(φ18～20μm),大部分位于闩嘴懊I平面(+100～+1800μm)的腹侧部。左心室主要接受疑核支配。发自迷走背核的心迷走神经节前纤维主要分布在冠状沟。  相似文献   

Altered adenosine triphosphatase activities in pigs with naturally occurring hypertrophic cardiomyopathy     

K-S. Dai  C-S. Liang  Y. T. Ch'iu  P-C. Yang  I. C. Cheng 《Veterinary research communications》1995,19(2):115-125

The purpose of this study was to determine whether myocardial adenosine triphosphatase (ATPase) activities were reduced in pigs with naturally occurring hypertrophic cardiomyopathy (HCM). The selection of hearts for the HCM and the normal control groups depended on histological examination. Specific ATPase activity and 5-nucleotidase activity were measured in left ventricular myocardium obtained from HCM (n=7) and normal control (n=7) animals. The histological features of HCM included marked disorientation of muscle cells, thickening of the intramural coronary arterial wall with a narrowed lumen, endocardial fibrosis and myocardial fibrosis. The HCM group showed significant increases in both heart weight (32%) and heart weight to body weight ratio (46%). The total ATPase activity in crude homogenates from the HCM group was significantly decreased by 16%. Azide-sensitive ATPase (mitochondrial ATPase) activity, ouabain-sensitive ATPase (Na⁺,K⁺-ATPase) activity, basal Mg²⁺-ATPase activity and Ca²⁺-ATPase activity were all significantly decreased by 18%, 30%, 20% and 50%, respectively. In contrast, no significant decrease was found in the mean values for 5-nucleotidase activity. These results suggest that myocardial ATPase activities are suppressed in pigs with naturally occurring HCMAbbreviations ATP adenosine triphosphate - gww grams wet weight - HCM hypertrophic cardiomyopathy - Pi inorganic phosphate  相似文献   

TOTAL ANOMALOUS PULMONARY VENOUS CONNECTION IN A FOAL     

Olga Seco Diaz  MRCVS    Anne Desrochers  DMV    Vickie Hoffmann  VMD    Virginia B. Reef  DVM 《Veterinary radiology & ultrasound》2005,46(1):83-85

An 8-day-old Arabian-Morgan cross colt underwent cardiac evaluation. The foal was tachycardic, tachypneic, exercise intolerant and had a loud right-sided heart murmur and cyanotic mucous membranes. Total anomalous pulmonary venous connection was diagnosed with echocardiography and confirmed at postmortem examination. Total anomalous pulmonary venous connection is a very rare congenital cardiac abnormality that has not been reported before in the horse.  相似文献   

大鼠心肌条件培养基对ICR小鼠胚胎干细胞分离克隆的影响     

薛亚梅  王锋 《畜牧兽医学报》2005,36(5):440-445

采用大鼠心肌条件培养基(RH CM)培养ICR小鼠的桑椹胚和囊胚,发现由囊胚分离的ES细胞传代后ES集落的出现率显著高于桑椹胚(P<0.05),囊胚更适合作为ES细胞分离克隆的材料。以RH CM为培养基的试验组ES细胞传代的平均时间间隔为38 h,对照组传代的时间间隔平均为78 h,两者差异显著(P<0.05)。表明RH CM能够促进ES细胞贴壁增殖和ES集落的形成,有效地维持ES细胞未分化状态。试验中设计的3 种培养条件对原代ES集落的形成影响不显著,但对传代后的ES集落的形成和传代的代次有显著差异。其中以MEF作饲养层,添加RH CM培养基的效果最好。  相似文献   

内毒素介导动物急性肾功能衰竭机理的试验研究   总被引：2，自引：0，他引：2  

吴立夫  周建国 《畜牧兽医学报》2005,36(3):283-287

为了阐明内毒素介导急性肾功能衰竭的机理,观察了内毒素性肾功能衰竭家兔血液凝固性变化和肾脏的病理形态学变化。与对照组家兔比较,模型组家兔血小板计数和血浆纤维蛋白原含量极显著降低(P<0 01),出血时间、凝血时间、凝血酶原时间和白陶土部分凝血活酶生成时间显著或极显著延长(P<0 05,P<0 01)。另一方面,内毒素注射在全部模型组家兔导致了弥漫性血管内凝血,71.4%的肾小球中发现了微血栓,肾小球纤维素密度指数达60 6%。此外,96.2%的肾小管上皮细胞变性坏死,84.1%的肾小管中有管型形成。对照组家兔均未发现这些病理变化。上述试验结果揭示,内毒素引发了弥漫性血管内凝血,而肾小球毛细血管内广泛形成的微血栓阻断了肾小球毛细血管血流,从而导致肾小球滤过率降低,这是内毒素介导急性肾功能衰竭的首要机理。此外,肾小管上皮细胞的变性、坏死可损害其重吸收和分泌功能,管型形成可阻塞肾小管管腔并增大肾球囊内的压力,这些也都是在内毒素介导急性肾功能衰竭发生发展过程中起重要作用的因素。  相似文献   

Retrospective Evaluation of the Effect of Heart Rate on Survival in Dogs with Atrial Fibrillation          下载免费PDF全文

B. Pedro  J. Dukes‐McEwan  M.A. Oyama  M.S. Kraus  A.R. Gelzer 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2018,32(1):86-92

Background

Atrial fibrillation (AF) usually is associated with a rapid ventricular rate. The optimal heart rate (HR) during AF is unknown.

Hypothesis/Objectives

Heart rate affects survival in dogs with chronic AF.

Animals

Forty‐six dogs with AF and 24‐hour ambulatory recordings were evaluated.

Methods

Retrospective study. Holter‐derived HR variables were analyzed as follows: mean HR (meanHR, 24‐hour average), minimum HR (minHR, 1‐minute average), maximum HR (maxHR, 1‐minute average). Survival times were recorded from the time of presumed adequate rate control. The primary endpoint was all‐cause mortality. Cox proportional hazards analysis identified variables independently associated with survival; Kaplan‐Meier survival analysis estimated the median survival time of dogs with meanHR <125 bpm versus ≥125 bpm.

Results

All 46 dogs had structural heart disease; 31 of 46 had congestive heart failure (CHF), 44 of 46 received antiarrhythmic drugs. Of 15 dogs with cardiac death, 14 had CHF. Median time to all‐cause death was 524 days (Interquartile range (IQR), 76–1,037 days). MeanHR was 125 bpm (range, 62–203 bpm), minHR was 82 bpm (range, 37–163 bpm), maxHR was 217 bpm (range, 126–307 bpm). These were significantly correlated with all‐cause and cardiac‐related mortality. For every 10 bpm increase in meanHR, the risk of all‐cause mortality increased by 35% (hazard ratio, 1.35; 95% CI, 1.17–1.55; P < 0.001). Median survival time of dogs with meanHR<125 bpm (n = 23) was significantly longer (1,037 days; range, 524‐open) than meanHR ≥125 bpm (n = 23; 105 days; range, 67–267 days; P = 0.0012). Mean HR was independently associated with all‐cause and cardiovascular mortality (P < 0.003).

Conclusions and Clinical Importance

Holter‐derived meanHR affects survival in dogs with AF. Dogs with meanHR <125 bpm lived longer than those with meanHR ≥ 125 bpm.  相似文献