Physiologic valve regurgitation in normal cats     

Darcy B. Adin DVM  Dipl ACVIM  Kay McCloy BS 《Journal of Veterinary Cardiology》2005,7(1):9-13

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Thermal Structure of Jupiter's Upper Atmosphere Derived from the Galileo Probe     

A Seiff  DB Kirk  TCD Knight  LA Young  FS Milos  E Venkatapathy  JD Mihalov  RC Blanchard  RE Young  G Schubert 《Science (New York, N.Y.)》1997,276(5309):102-104

Temperatures in Jupiter's atmosphere derived from Galileo Probe deceleration data increase from 109 kelvin at the 175-millibar level to 900 ± 40 kelvin at 1 nanobar, consistent with Voyager remote sensing data. Wavelike oscillations are present at all levels. Vertical wavelengths are 10 to 25 kilometers in the deep isothermal layer, which extends from 12 to 0.003 millibars. Above the 0.003-millibar level, only 90- to 270- kilometer vertical wavelengths survive, suggesting dissipation of wave energy as the probable source of upper atmosphere heating.  相似文献   

Correction of serum chloride concentration in dogs with congestive heart failure     

Darcy Adin  Clarke Atkins  Leonel Londoo  Bruna Del Nero 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2021,35(1):51-57

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Gravity Waves in Jupiter's Thermosphere     

LA Young  RV Yelle  R Young  A Seiff  DB Kirk 《Science (New York, N.Y.)》1997,276(5309):108-111

The Atmosphere Structure Instrument on the Galileo probe detected wavelike temperature fluctuations superimposed on a 700-kelvin temperature increase in Jupiter's thermosphere. These fluctuations are consistent with gravity waves that are viscously damped in the thermosphere. Moreover, heating by these waves can explain the temperature increase measured by the probe. This heating mechanism should be applicable to the thermospheres of the other giant planets and may help solve the long-standing question of the source of their high thermospheric temperatures.  相似文献   

ECG of the Month     

Maisenbacher HW  Adin DB 《Journal of the American Veterinary Medical Association》2006,229(1):40-42

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Radical Cystectomy and Cutaneous Ureterostomy in 4 Dogs with Trigonal Transitional Cell Carcinoma: Description of Technique and Case Series          下载免费PDF全文

Rafael Ricardo Huppes  Leandro Z. Crivellenti  Andrigo Barboza De Nardi  Bruno Roque Lima  Cristiane Alves Cintra  Jorge Luiz Costa Castro  Christopher A. Adin 《Veterinary surgery : VS》2017,46(1):111-119

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Primary hypoparathyroidism in two horses     

NPH HUDSON  DB CHURCH  J TREVENA  IL NIELSEN  D MAJOR  DR HODGSON 《Australian veterinary journal》1999,77(8):504-508

Two Thoroughbred horses were presented with various clinical signs which included sweating, agitation, muscle twitching and synchronous diaphragmatic flutter. These signs were associated with profound hypocalcaemia. A diagnosis of primary hypoparathyroidism was made on the basis of low serum ionised calcium concentration, hyperphosphataemia and markedly reduced serum immunoreactive parathyroid hormone concentrations in the presence of normal renal function. Treatment with a combination of intravenous calcium and subsequently oral calcium, magnesium and a vitamin D analogue (dihydrotachysterol) for up to 65 days resulted in complete remission of clinical signs. Horse 1 was euthanased 12 months after the initial recognition of signs. Results of necropsy were unremarkable apart from an absence of detectable parathyroid tissue. Horse 2 returned to athletic activities while receiving only maintenance doses of oral calcium carbonate.  相似文献   

Effect of acute haemorrhage on QRS amplitude of the lead II canine electrocardiogram     

PK DELLA TORRE  S. ZAKI  M. GOVENDIR  DB CHURCH  R. MALIK 《Australian veterinary journal》1999,77(5):298-300

OBJECTIVE: To examine the effect of acute haemorrhage on the QRS amplitude of the canine lead II surface electrocardiograph (ECG). DESIGN: Ten adult racing Greyhounds were tranquilised, anaesthetised, positioned in right lateral recumbency and connected to recording electrodes of an ECG unit. Baseline six-lead ECG traces were recorded, and further traces were obtained after one unit (460 mL) of blood, and then a second unit, were collected from the femoral artery. RESULTS: There was a consistent and progressive reduction in amplitude of the QRS complex in all leads during acute haemorrhage. QRS amplitude in lead II after removal of two units of blood averaged 74% of the baseline voltage, with individual values of 61 to 91% (P < 0.0001). There were even greater reductions in QRS amplitudes in lead aVL during haemorrhage. In three additional dogs, reductions in QRS voltages were shown to be accompanied by reductions in end-diastolic left ventricular internal dimensions measured echocardiographically. Furthermore, the effects of haemorrhage on the QRS amplitude and echocardiographic measurements were reversed when circulating blood volume was restored by re-infusion of blood removed previously. CONCLUSION: Acute haemorrhage corresponding to an approximately one-third reduction in blood volume caused a substantial reduction in QRS voltage of the surface ECG. It is postulated that this resulted from diminished ventricular distension as a consequence of reduced venous return. A similar mechanism may account for the small-amplitude ECG complexes associated with pericardial effusion, severe dehydration and hypovolaemia.  相似文献   

Plasma cortisol concentrations in normal dogs given hydrocortisone sodium succinate     

DB CHURCH  WA LAMB  DR EMSLIE 《Australian veterinary journal》1999,77(5):316-317

OBJECTIVE: To evaluate the effects on plasma cortisol concentration of a continuous infusion of a readily available steroid with equipotent glucocorticoid and mineralocorticoid effects. PROCEDURE: Plasma cortisol concentrations were measured before and regularly after hydrocortisone sodium succinate was administered as a continuous intravenous infusion over 6 h at 0.32 and 0.65 mg kg-1 h-1 to 12 healthy dogs weighing 12 to 22 kg. RESULTS: The infusion at both does rates produced significant and stable increases in plasma cortisol concentrations. The plateau concentrations produced by the large and small doeses were respectively above and below plasma cortisol concentrations likely to provide adequate glucocorticoid and mineralocorticoid activity in stressed dogs with significantly decreased adrenal function. CONCLUSION: This paper presents information regarding the changes in plasma cortisol concentrations in 12 normal dogs given an hydrocortisone sodium succinate infusion at two dose rates. The marked and continuous increase in plasma cortisol concentrations suggests a continuous HSS infusion may be a possible alternative to desoxycorticosterone acetate and dexamethasone in the treatment of acute adrenal dysfunction.  相似文献   

Evidence for extreme climatic warmth from late cretaceous arctic vertebrates   总被引：1，自引：0，他引：1  

JA Tarduno  DB Brinkman  PR Renne  RD Cottrell  H Scher  P Castillo 《Science (New York, N.Y.)》1998,282(5397):2241-2244

A Late Cretaceous (92 to 86 million years ago) vertebrate assemblage from the high Canadian Arctic (Axel Heiberg Island) implies that polar climates were warm (mean annual temperature exceeding 14 degreesC) rather than near freezing. The assemblage includes large (2.4 meters long) champsosaurs, which are extinct crocodilelike reptiles. Magmatism at six large igneous provinces at this time suggests that volcanic carbon dioxide emissions helped cause the global warmth.  相似文献