Relationship of pulmonary arterial pressure to pulmonary haemorrhage in exercising horses

2010 ◽  
Vol 32 (5) ◽  
pp. 379-384 ◽  
Author(s):  
I. Langsetmo ◽  
M. R. Fedde ◽  
T. S. Meyer ◽  
H. H. Erickson
Keyword(s):  
Arterial Pressure ◽  
Pulmonary Arterial Pressure ◽  
Pulmonary Haemorrhage ◽  
Pulmonary Arterial ◽  
Relationship Of

Relationship of pulmonary arterial pressure and airflow obstruction to emphysema

1993 ◽  
Vol 74 (3) ◽  
pp. 1320-1324 ◽  
Author(s):  
J. L. Wright
Keyword(s):  
Arterial Pressure ◽  
Cigarette Smoke ◽  
Guinea Pigs ◽  
Pulmonary Arterial Pressure ◽  
Airflow Obstruction ◽  
Control Group ◽  
Moderate Degree ◽  
Emphysematous Lung ◽  
Pulmonary Arterial ◽  
Relationship Of

Guinea pigs were exposed to cigarette smoke for 6 mo, after which lung and cardiac function and lung morphology were examined. The smoke-exposed animals were divided into two groups on the basis of final pulmonary arterial pressure. We found that the smoke-exposed animals with increased pulmonary arterial pressure had a moderate degree of airflow obstruction compared with the normotensive smoke group, which showed only mild airflow obstruction, and with the control group. Both smoke groups had similar degrees of emphysema. Although both smoke groups had an increased percentage of muscularized small arterioles, only the group with increased pulmonary arterial pressure had an altered flow-pressure response to dobutamine. We conclude that although cigarette smoke appears to induce changes in the vascular structure and to produce emphysematous lung destruction, the increased pulmonary arterial pressure in guinea pigs chronically exposed to smoke is not directly related to either of these findings. Instead, it appears that there is a dynamic alteration of both the airways, producing airflow obstruction, and the vasculature, producing increased pulmonary arterial pressure.

scholarly journals Relationship of pulmonary arterial pressure and terrain use of Angus cows grazing high-altitude foothill rangelands

2016 ◽  
Vol 190 ◽  
pp. 76-80 ◽  
Author(s):  
Derek W. Bailey ◽  
Milton G. Thomas ◽  
Tim N. Holt ◽  
Mitch B. Stephenson ◽  
R. Mark Enns ◽  
...  
Keyword(s):  
Arterial Pressure ◽  
High Altitude ◽  
Pulmonary Arterial Pressure ◽  
Pulmonary Arterial ◽  
Relationship Of

Natural frequency/damping coefficient relationship of the catheter-manometer system required for high-fidelity measurement of the pulmonary arterial pressure

1993 ◽  
Vol 7 (4) ◽  
pp. 419-426
Author(s):  
Yoshio Kinefuchi ◽  
Toshiyasu Suzuki ◽  
Mamoru Takiguchi ◽  
Yonosuke Yamasaki ◽  
Michio Yamamoto ◽  
...  
Keyword(s):  
Arterial Pressure ◽  
Natural Frequency ◽  
Pulmonary Arterial Pressure ◽  
Damping Coefficient ◽  
High Fidelity ◽  
Pulmonary Arterial ◽  
Relationship Of

ASSA14-14-08 Relationship of secundum atrial seplal defect with pulmonary arterial pressure in children less than 5 years old

Heart ◽  
2014 ◽  
Vol 101 (Suppl 1) ◽  
pp. A43.1-A43
Author(s):  
Z Po ◽  
Z Xianyang ◽  
W Qiguang ◽  
Z Duanzhen ◽  
H Xiumin
Keyword(s):  
Arterial Pressure ◽  
Pulmonary Arterial Pressure ◽  
Pulmonary Arterial ◽  
Relationship Of

PAF increases vascular permeability without increasing pulmonary arterial pressure in the rat

2001 ◽  
Vol 90 (1) ◽  
pp. 261-268 ◽  
Author(s):  
Leonardo C. Clavijo ◽  
Mary B. Carter ◽  
Paul J. Matheson ◽  
Mark A. Wilson ◽  
William B. Wead ◽  
...  
Keyword(s):  
Arterial Pressure ◽  
Pulmonary Edema ◽  
Pulmonary Arterial Pressure ◽  
Ex Vivo ◽  
Platelet Activating Factor ◽  
Microvascular Permeability ◽  
Blue Dye ◽  
E Coli ◽  
Pulmonary Arterial

In vivo pulmonary arterial catheterization was used to determine the mechanism by which platelet-activating factor (PAF) produces pulmonary edema in rats. PAF induces pulmonary edema by increasing pulmonary microvascular permeability (PMP) without changing the pulmonary pressure gradient. Rats were cannulated for measurement of pulmonary arterial pressure (Ppa) and mean arterial pressure. PMP was determined by using either in vivo fluorescent videomicroscopy or the ex vivo Evans blue dye technique. WEB 2086 was administered intravenously (IV) to antagonize specific PAF effects. Three experiments were performed: 1) IV PAF, 2) topical PAF, and 3) Escherichia coli bacteremia. IV PAF induced systemic hypotension with a decrease in Ppa. PMP increased after IV PAF in a dose-related manner. Topical PAF increased PMP but decreased Ppa only at high doses. Both PMP (88 ± 5%) and Ppa (50 ± 3%) increased during E. coli bacteremia. PAF-receptor blockade prevents changes in Ppa and PMP after both topical PAF and E. coli bacteremia. PAF, which has been shown to mediate pulmonary edema in prior studies, appears to act in the lung by primarily increasing microvascular permeability. The presence of PAF might be prerequisite for pulmonary vascular constriction during gram-negative bacteremia.

scholarly journals 275 Phenotypic relationships between heart score and feed efficiency, carcass, and pulmonary arterial pressure traits

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 204-205
Author(s):  
Kathryn R Heffernan ◽  
Scott Speidel ◽  
Milt Thomas ◽  
Mark Enns ◽  
Tim Holt
Keyword(s):  
Arterial Pressure ◽  
Feed Efficiency ◽  
Pulmonary Arterial Pressure ◽  
Carcass Traits ◽  
Multiple Linear Regression Model ◽  
Strong Relationship ◽  
Fixed Effect ◽  
Heart Score ◽  
Important Relationship ◽  
Pulmonary Arterial

Abstract Pulmonary hypertension (PH) can lead to premature mortality in fed cattle and is often called Feedlot Heart Disease (FHD). To date, pulmonary arterial pressure (PAP) has been the only indicator trait of PH that has been evaluated. The objective of this study was to evaluate relationships between heart score (using heart score as a phenotype for PH) and PAP, carcass, and feed efficiency traits in fattening Angus steers. Our hypothesis was that feed efficiency and carcass traits, along with PAP, would demonstrate a strong relationship with heart score. Feed efficiency, carcass, PAP and heart score data from 89 Black Angus steers from Colorado State University Beef Improvement Center were collected and used for this study. Evaluations were performed using a multiple linear regression model, which included heart score as a categorical fixed effect and age as a continuous fixed effect. Least Square Means, pairwise comparisons, and ANOVA tables were constructed per trait. PAP (P < 0.001) showed an important relationship to heart score and average dry matter (P < 0.10) intake approached importance to heart score. In general, feed efficiency and carcass traits decreased as heart score increased, but PAP was the only trait with a strong relationship to heart score (P < 0.05). This led us to reject our hypothesis.

scholarly journals 265 Evaluation of the genetic relationship amongst high elevation pulmonary arterial pressure, feedlot and carcass performance traits

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 197-197
Author(s):  
Emma A Briggs ◽  
Scott Speidel ◽  
Mark Enns ◽  
Milt Thomas ◽  
Tim Holt
Keyword(s):  
Arterial Pressure ◽  
Genetic Relationship ◽  
Feed Intake ◽  
Pulmonary Arterial Pressure ◽  
Carcass Traits ◽  
Genetic Correlations ◽  
High Elevation ◽  
Pulmonary Arterial ◽  
Carcass Performance ◽  
Moderate Elevation

Abstract The objective of the study was to evaluate if a genetic relationship exists between pulmonary arterial pressure (PAP) measured at high elevation with traits associated with moderate elevation feedlot and carcass traits. For this analysis, PAP, feed intake, and carcass data were taken from 6,898, 558, and 1,627 animals, respectively. At an elevation of 2,115 m, PAP measurements were collected, then a selective group of steers was relocated to a moderate elevation feedlot (1,500 m) where feed intake data were collected. Genetic relationships were evaluated with 5-trait animal models using REML statistical analysis. For all traits in the analysis, fixed effects and contemporary groups were assigned as well as a direct genetic random effect. For weaning weight, a maternal permanent environmental effect was applied in the analysis. For PAP, the heritability estimate was 0.29 ± 0.03. Genetic correlations between PAP with feedlot traits was positive, with estimates of 0.34 ± 0.20 (average dry matter intake) and 0.05 ± 17 (average daily gain). The strongest genetic correlation between PAP and carcass performance traits were those of rib eye area (-0.30 ± 0.12) and calculated yield grade (0.29 ± 0.13). Genetic correlations between PAP and marbling score, back fat, or hot carcass weight were 0.00 ± 0.13, -0.07 ± 0.13, and 0.14 ± 0.10, respectively. These results suggest a favorable genetic relationship exists between PAP with feedlot and carcass traits.

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