Changes of Heart Rate in Holstein Cows, especially Intrinsic Heart Rate with Growth
نویسندگان
چکیده
منابع مشابه
Influence of sickness condition on diurnal rhythms of heart rate and heart rate variability in cows
Parameters of heart rate variability would explain changes in heart rate during the disease status in cows and to evaluate whether such changes might provide a more sensitive and quantitative indicator of these conditions than crude indices. For this purpose, we recorded electrocardiograms for 24 hr using a Holter-type electrocardiograph and applied power spectral analysis of heart rate variabi...
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Sir, During a study ofchanges in afterload induced by the cold pressor test, Smith et al (1989;61:344-7) recognised a relation between heart rate and transmitral velocities derived from pulsed Doppler recordings. We specifically studied the relation between transmitral velocities and differing RR intervals during exercise and respiration in healthy men.'2We found a clear cut linear change in pe...
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The periodic and random variations in human heart rate are physiologically and clinically significant. A wide variety of signal processing techniques have been applied to heart rate time series to extract information regarding heart rate variability. The heart rate response to a startling auditory stimulus is a useful measure of an individual's cardiovascular reactivity and may be related to th...
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We investigated changes in heart rate (HR) and HR variability as a function of age in newborn foals to old Thoroughbred horses. Experiments were performed on a total of 83 healthy and clinically normal Thoroughbred horses. Resting HR decreased with age from birth. The relationship between age and HR fit the equation Y=48.2X-0.129(R2=0.705); the relationship between age and HR for horses 0-7 yea...
متن کاملHeart Rate and Heart Rate Variability in Dairy Cows with Different Temperament and Behavioural Reactivity to Humans
From the 1990s, extensive research was started on the physiological aspects of individual traits in animals. Previous research has established two extreme (proactive and reactive) coping styles in several animal species, but the means of reactivity with the autonomic nervous system (ANS) activity has not yet been investigated in cattle. The aim of this study was the characterization of cardiac ...
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ژورنال
عنوان ژورنال: Nihon Chikusan Gakkaiho
سال: 1988
ISSN: 1346-907X,1880-8255
DOI: 10.2508/chikusan.59.610