Hemodynamic studies in conscious domestic ponies

Amend, J F; Garner, H. E.; Rosborough, John P.; Hoff, Hebbel E.

doi:10.1016/0022-4804(75)90114-6

Cited by 11 publications

(6 citation statements)

References 4 publications

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“…Senta, et al (1973) gave values for LVET in the Thoroughbred which were slightly longer than those found in the present series. The differences between the present results, those of Amend, et al (1972Amend, et al ( , 1975 and those of Senta, et al (1973) indicate that LVET in the horse is possibly influenced by several factors including heart rate and breed, as well as the state of the cardiovascular system. An indication of the variation of the phases of the cycle with heart rate was shown in the results from Case 565, but as essentially only 2 groups of R-R intervals occurred no firm relationship could be established.…”

Section: Ventricular Eject Ioncontrasting

confidence: 92%

“…Work in this laboratory has shown that the first sound occurs about 10 to 20 msec after the onset of pressure rise in the ventricles and thus the Q -SI interval may be an overestimate of the electromechanical delay. The values given by Amend, et al (1975) for this interval may also be higher for the same reason.…”

Section: Ventricular Systolementioning

confidence: 91%

“…Hillidge and Lees (1977) gave a value of 330 f 20 msec for this phase, but as they were using dp/dt to measure the intervals their values may be underestimated. Amend, et al (1972Amend, et al ( , 1975) derived a regression equation which related LVET to heart rate in ponies. In the 6 horses examined in this study this equation gave estimates of LVET which were up to 30 per cent different from the measured value.…”

Section: Ventricular Eject Ionmentioning

confidence: 99%

“…The objectives of this study were to measure the duration of various mechanical events on both the left and right sides of equine hearts and relate them to electrical events using intravascular-located transducers. Some of the previous reports (Amend, et al, 1972(Amend, et al, , 1975Senta, et al, 1973;Hillidge and Lees, 1977) are based on data collected using fluid-filled systems and these are prone to artefact production and transmission delays (Fry, 1960). The use of micromanometers overcame these problems and accuracy was further improved by using a computer to measure the intervals.…”

Section: Introductionmentioning

confidence: 99%

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Haemodynamics in the Horse: 3. Duration of the Phases of the Cardiac Cycle

Brown

Holmes

1978

Equine Veterinary Journal

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SUMMARY The paper reports observations on the duration of various phases of the cardiac cycleusing a bipole ECG record as a time base from which to measure the timing of pressure changes in the chambers of the heart and great vessels. From the findings the likely sequence of mechanical events during the cardiac cycle in the atria and ventricles is described. RÉSUMÉ Cet article rapporte des observations faites sur la durée des différentes phases du cycle cardiaque faites en utilisant une E.C.G. bipolaire comme référence chronologique à laquelle on rapporte les variations de pression dans les cavités cardiaques et dans les grands vaisseaux. A partir de ces constatations la succession des phénomènes mécaniques qui ont lieu dans les oreillettes et dans les ventricules est décrite. ZUSAMMENFASSUNG Dieser Bericht vermittelt Beobachtungen über die Dauer der verschiedenen Phasen des cardialen Cyclus. Verwendet wurde dazu ein bipolares EKG als Zeitbasis, von der aus der Zeitpunkt von Druckveränderungen in den Kammern und grossen Gefässen gemessen worden ist. Die Resultate dienten der Beschreibung der wahrscheinlichen Sequenz mechanischer Abläufe während des cardialen Cyclus in Vorhöfen und Ventrikeln.

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Section: Ventricular Eject Ioncontrasting

confidence: 92%

Section: Ventricular Systolementioning

confidence: 91%

Section: Ventricular Eject Ionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Haemodynamics in the Horse: 3. Duration of the Phases of the Cardiac Cycle

Brown

Holmes

1978

Equine Veterinary Journal

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“…Bradley (1896), Bohm and Stepanek (1957), Robb, et af. (1972), Kubo, Senta and Sugimoto (1974) and Amend, Garner, Rosborough and Hoff (1975) have also provided data on organ and body weights, but with limited supplementary information. Some of these reports were confined to one organ.…”

Section: Introductionmentioning

confidence: 99%

Body Composition of the Horse

Webb

Weaver

1979

Equine Veterinary Journal

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SUMMARY Seventeen horses were dissected and their organs and tissues weighed. The results of these dissections are presented together with comparisons of the data with that already available in the literature. Predictive equations for organs and tissue weights are also given which were derived by comparison of linear and allometric regression models using 4 different body weight indices. RÉSUMÉ 17 chevaux furent disséqués et le poids de leurs organes et de leur tissus fut mesuré. On présente les données recueillies avec celles figurant dans la littérature. Des équations permettent de calculer le poids des organes et des tissus, à partir de quatre indices pondéraux. ZUSAMMENFASSUNG 17 Pferde wurden seziert, ihre Organe und Gewebe gewogen. Die Resultate dieser Sektionen werden vorgestellt zusammen mit Vergleichen mit Literaturangaben. Gleichungen zur Bestimmung für Organ‐und Gewebegewichte werden aufgestellt, die durch den Vergleich linearer und allometrischer Regressionsmodelle mit vier verschiedenen Körpergewichtsindizes gewonnen worden sind.

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Disorders of the Cardiovascular System

Bonagura¹,

Reef²

2004

Equine Internal Medicine

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Hemodynamic studies in conscious domestic ponies

Cited by 11 publications

References 4 publications

Haemodynamics in the Horse: 3. Duration of the Phases of the Cardiac Cycle

Haemodynamics in the Horse: 3. Duration of the Phases of the Cardiac Cycle

Body Composition of the Horse

Disorders of the Cardiovascular System

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