QUANTITATIVE ASSESSMENT OF SURGICALLY INDUCED MITRAL REGURGITATION USING RADIONUCLIDE VENTRICULOGRAPHY AND FIRST PASS RADIONUCLIDE ANGIOGRAPHY     

Gregory B.  Daniel  DVM  MS  Kyle K.  Kerstetter  DVM  Jill E.  Sackman  DVM  PhD  Janice M.  Bright  MS  DVM  Dorothy  Schmidt  BS 《Veterinary radiology & ultrasound》1998,39(5):459-469

Radionuclide ventriculography has been used in humans to evaluate valvular incompetency. The stroke volume ratio, derived from the radionuclide ventriculogram, is used to quantify the severity of mitral regurgitation (MR). Previous studies conducted in humans have shown that left to right stroke volume ratio increases as the severity of MR increases. In this study, we evaluated radionuclide ventriculography as a noninvasive method to detect MR in dogs with surgically created mitral insufficiency. Six male and three female adult, conditioned mongrel dogs were used. Scintigraphic studies were performed prior to and 4 weeks after surgically created MR. Because of the overlap of the left and right ventricles when viewed from a left lateral position, we combined data from a first-pass radionuclide angiocardiogram with the radionuclide ventriculogram to obtain a corrected stroke volume ratio. Blood flow transit parameters were also derived from the first-pass radionuclide angiocardiogram. Standard left ventricular functional indices were also measured from the radionuclide ventriculogram. On the left lateral view of the heart, 25 to 30% of the right ventricular volume overlaps the left ventricle. After correcting for the overlap, the stroke volume ratio of normal dogs was 1.17±0.178 (mean±SD), which increased to 2.06±0.41 (mean±SD) (p<.001) 4 weeks after creation of MR. The was no significant change in left ventricular ejection fraction or peak rate of ejection following MR. The transit times of blood through the left ventricle were measured from the first-pass radionuclide angiocardiogram and were expressed as half-time clearance, peak clearance rate, and time to peak clearance rate. The baseline half-time clearance was 2.07±0.71 s (mean±SD), which increased to 6.70±4.89 s (mean±SD) (p=.02) after creation of MR. The baseline peak clearance rate was 49.75±8.96 cts/s (mean±SD), which decreased to 23.12±6.84 cts/s (mean±SD) (p<.001) after creation of MR. Stroke volume ratios significantly increased following creation of MR. Blood flow transit through the left ventricle slowed following creation of MR. The variability of these parameters were small in the baseline studies, suggesting these techniques may be clinically useful to gauge the severity of MR in dogs.  相似文献   

Pseudomonas syringae pv. aesculi associated with horse chestnut bleeding canker in Germany     

O. Schmidt  D. Dujesiefken  H. Stobbe  U. Moreth  R. Kehr  Th. Schröder 《Forest Pathology》2008,38(2):124-128

Bacteria were isolated from necrotic lesions on a horse chestnut tree (Aesculus hippocastanum) with bleeding canker in Hamburg, Germany. Sequencing of the rDNA-ITS region revealed great similarity to pathovars of Pseudomonas syringae. Pseudomonas syringae pv. aesculi was identified by sequence homology of the gyrase B gene. This is the first report of P. syringae pv. aesculi in Germany. Phytophthora was not detected.  相似文献   

Experimental contributions to the recognition of dermatitis pustulosa in sheep. VI. The specificity of the complement binding reaction with dermatitis pustulosa antigen     

D Schmidt 《Archiv fuer experimentelle veterinaermedizin》1967,21(4):947-967

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Diagnostic Accuracy of Estimating the Number of CL and Ovarian Volume to Predict Superovulatory Response in Dairy Cattle     

N Kanuya  M Schmidt  M Chriél  T Greve 《Reproduction in domestic animals》1997,32(6):291-296

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Sectional notes     

H. G. Zuckerman  C. H. Metzger  B. A. Brown  W. B. Ward  Frank W. Hussey  R. W. Donaldson  E. E. Isaac  Marx Koehnke  William H. Martin  K. H. Fernow  E. V. Hardenburg  Robert Schmidt  E. M. Gillig  E. B. Tussing  E. R. Jackman  T. E. Odland  S. P. Swenson  John Tucker 《American Journal of Potato Research》1936,13(8):223-232

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Coliform myositis in a calf     

L L Wallace  B Fagin  D Schmidt  W H Fales 《Journal of the American Veterinary Medical Association》1990,197(11):1487-1488

Coliform myositis was diagnosed in a young calf with signs of pain, swelling, and edema of the right hind limb. Diagnostic methods included bacteriologic culture and antimicrobial susceptibility testing. The organism isolated was a gas-producing Escherichia coli. The infection responded to administration of trimethoprim/sulfadiazine, to which the organism was susceptible in vitro.  相似文献   

Über die Anwendung von Apfelwickler- und Pflaumenwickler-Pheromonfallen beim Warndienst für Kleingärtner     

Dipl.-Biol. H. -U. Schmidt 《Journal of pest science》1987,60(2):27-31

It is reported about the experiences with the Biotrap Lockstoff-Falle für Schadinsekten AW and PW (HOECHST AG, Frankfurt) to improve plant protection prognosis against the codling moth (Cydia pomonella Busck.) and the plum fruit moth (Cydia funebrana Tr.) for allotment holders, settlers and houseowners. The flight activities of these pests were observed with pheromone traps by 19 to 27 additional voluntary assistants (allotment holders) since 1982 to support the official plant protection service in monitoring the a. m. moth species.—For a time of 20 weeks the assistants reported each monday the number of captured moth's to the plant protection office. Curves of the flight activities were based on the weekly moth captures. Drawing conclusions from the four year lasting observations, it is evident, that the main flight activity of the one generation of the codling moth lasts from the 26. to the 29. calendary week. The first generation of the plum fruit moth can be obtained during the 21. and 23. calendary week and the second one from the 30. to the 33. calendary week. The suitable time for control measures varied from year to year and was published between 21st and 23rd of June for the codling moth and between the 12th and 23rd of July for the plum fruit moth. The experiment with allotment holders as additional assistants was very successfull.  相似文献   

Investigations on the influence of wood-inhabiting bacteria on the pH-value in trees     

O. Schmidt 《Forest Pathology》1986,16(3):181-189

Regardless of their isolation origin, bacteria from wetwood of fir and poplar, from polluted beech and spruce trees, and from discoloured timber of Ilomba, acidified aerobically glucose-rich substrates by organic acid production and increased the pH of protein media by ammonia. The pH-changes occurred in laboratory nutrient media and also in the physiologically characterized capillary liquids and wood flours of fir, poplar and spruce.  相似文献   

    

Schmidt H. 《Journal of pest science》1960,33(5):79

Ohne Zusammenfassung  相似文献   

Active enzymes in wood chips and their action on lignin during outside storage     

Prof. Dr. K. Fischer  Ing. I. Schmidt 《Wood Science and Technology》1991,25(4):281-287

Summary Wood storage has a great influence on the efficiency of a pulpmill. Great problems arise when using outside chip storage, especially in processing hardwoods, in that hardwood chips discolorate after a few days, which is not the case with spruce chips. The causes of such a different behavior of beech and spruce were investigated. It could be shown that a sufficient amount of active peroxidase, malate dehydrogenase and oxygen are prerequisites for the formation of phenoxy radicals within the beech lignin. This causes formation of new chromophores that discolorize the wood. Sufficient amounts of such enzymes are present in beech wood after harvesting.  相似文献