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Weigle GE Langsetmo I Gallagher RR Dyer RA Erickson HH Fedde MR 《Equine veterinary journal》2000,32(2):101-108
The objective of this study was to develop and test a technique to allow dynamic cardiac function to be studied during exercise in the horse. Blood pressure waveforms in the exercising horse are difficult to interpret because of the large influence of stride and respiration. A method has been devised to study dynamic right ventricular variables during high-speed exercise in the horse. A Fast Fourier Transform was performed on the digitised pressure waveforms and the frequency components associated with stride and respiration were removed. An inverse Fourier Transform was then performed to generate a time-domain pressure signal. Several dynamic right ventricular variables were calculated using the derived signal. Various parameters associated with removing frequencies from the frequency-domain pressure signal were changed to determine their influence on the variables. Most of the variables were not sensitive to these parameters. When compared during separate exercise bouts, some variables differed among runs, while others were not significantly different. Using the signal separation technique described here, right ventricular function of an exercising horse can be critically analysed. 相似文献
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D P Gallagher 《Veterinary Clinics of North America: Small Animal Practice》1986,16(4):729-743
The extent to which a computer can be effectively employed in a veterinary practice depends to a large extent upon the size of the practice. Estimating defensible money investment in hardware and software prior to purchase is typically problematic because of the assumptions entailed in gauging potential return on capital. Successful software decisions flow principally from careful prepurchase planning and rigorous adherence to high standards of postpurchase support from the vendor selected. Staff involvement in the planning phase should be encouraged. The period of installation and implementation will probably be a stressful time in the practice. 相似文献
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Margie Lee Gallagher Dale F. Leavitt Robert C. Bayer James H. Rittenburg 《Aquaculture (Amsterdam, Netherlands)》1984,38(3):195-199
Four non-destructive measures of growth (wet weight in air, wet weight in water, displacement volume and carapace length) were correlated to two destructive measures of growth (dry weight and total body protein level) in adult American lobsters (Homarus americanus). All non-destructive parameters were significantly (P < 0.05) correlated to dry weight and protein for female lobsters. Only wet weight in water was significantly correlated to dry weight and total body protein level in male lobsters. 相似文献
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