Temperature-dependence of cardiac output and regional blood flow in rainbow trout, Salmo gairdneri Richardson

1987 ◽  
Vol 31 (6) ◽  
pp. 735-744 ◽  
Author(s):  
M. G. Barron ◽  
B. D. Tarr ◽  
W. L. Hayton
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Rainbow Trout ◽  
Temperature Dependence ◽  
Regional Blood Flow ◽  
Salmo Gairdneri

Circulatory and Ventilatory Responses of Rainbow Trout (Salmo gairdneri) to Artificial Manipulation of Gill Surface Area

1971 ◽  
Vol 28 (10) ◽  
pp. 1609-1614 ◽  
Author(s):  
John C. Davis
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Rainbow Trout ◽  
Surface Area ◽  
Salmo Gairdneri ◽  
Ventilatory Responses ◽  
Arterial Blood ◽  
Gill Area ◽  
Gill Surface Area ◽  
The Brain

Reductions in surface area of the gill were artificially produced by ligating various gill arches and occluding their blood supply. Rainbow trout (Salmo gairdneri) responded to a 40–57% reduction in gill area, by increasing cardiac output and ventilation volume, and probably by redistributing blood within the remaining functional gill area. Fish with blood flow to gill arches one and three only, could maintain arterial PO2 at 90–100 mm Hg, whereas, in those with blood flow to arches three and four only, arterial PO2 fell to around 40 mm Hg. The presence of a chemoreceptor site for the regulation of arterial PO2 associated with the efferent blood vessels of arch number one is discussed. Such a receptor may be located in the pseudobranch or in the portion of the brain supplied with arterial blood from the first gill arch.

scholarly journals Cardiac Output and Regional Blood Flow in Gills and Muscles after Exhaustive Exercise in Rainbow Trout (Salmo Gairdneri)

1983 ◽  
Vol 105 (1) ◽  
pp. 1-14
Author(s):  
PETER NEUMANN ◽  
GEORGE F. HOLETON ◽  
NORBERT HEISLER
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Rainbow Trout ◽  
Muscle Blood Flow ◽  
Recovery Period ◽  
Flow Distribution ◽  
Strenuous Exercise ◽  
Salmo Gairdneri ◽  
Diffusion Resistance ◽  
Blood Flow Distribution

Rainbow trout (Salmo gairdneri) were electrically stimulated to exhausting activity and the changes in cardiac output and blood flow distribution to gills and systemic tissues resulting from the developing severe lactacidosis were repeatedly measured by the microsphere method (15 μm). Determination of cardiac output by application of the Fick principle resulted in values not significantly different from cardiac output measured by the indicator dilution technique, suggesting that cutaneous respiration, oxygen consumption, and arterio-venous shunting were insignificant under these conditions. Following muscular activity, cardiac output was elevated by up to 60%. In the gills, the blood flow distribution in the gill arches showed a consistent pattern, even during lactacidosis, with a higher perfusion in gill arches II and III, and in the middle sections of individual gills. Blood flow to white and red muscle was increased much more than cardiac output (+230 and +490%, respectively) such that blood flow to other tissues was actually reduced. We conclude that the elimination of lactate from muscle cells during the recovery period from strenuous exercise is delayed, not as a result of an impaired post-exercise muscle blood flow, but probably as a result of a high diffusion resistance in the cell membrane. Note: Deceased.

Cardiac output and regional blood flow in hypoxic woodchucks

1971 ◽  
Vol 220 (6) ◽  
pp. 1565-1568 ◽  
Author(s):  
RF Burlington ◽  
JA Vogel ◽  
TM Burton ◽  
IA Salkovitz
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Regional Blood Flow

Effect of enkephalins on cardiac output and regional blood flow in conscious dogs

1989 ◽  
Vol 257 (3) ◽  
pp. 1-1
Author(s):  
C. L. Rosen ◽  
A. Cote ◽  
G. G. Haddad
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Regional Blood Flow ◽  
Conscious Dogs

Page H1656: C. L. Rosen, A. Cote, and G. G. Haddad. “Effect of enkephalins on cardiac output and regional blood flow in conscious dogs.” Figures 5 and 6 should appear as follows. (See PDF)

scholarly journals Hyperbaric oxygenation: Alterations in cardiac output and regional blood flow

1966 ◽  
Vol 52 (2) ◽  
pp. 223-231 ◽  
Author(s):  
Paul B. Hahnloser ◽  
Erwin Domanig ◽  
Edward Lamphier ◽  
Worthington G. Schenk
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Hyperbaric Oxygenation ◽  
Regional Blood Flow

Cardiovascular adjustments to laboratory diving in beavers and nutria

1982 ◽  
Vol 242 (5) ◽  
pp. R434-R440
Author(s):  
T. McKean
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Regional Blood Flow ◽  
Castor Canadensis ◽  
Venous Blood ◽  
Regional Distribution ◽  
Blood Gases ◽  
Myocastor Coypus ◽  
Recovery From Anesthesia ◽  
Rate Of Decline

Beavers (Castor canadensis) and nutria (Myocastor coypus) were anesthetized with halothane and catheters placed in the left ventricle, aorta and pulmonary artery, right ventricle or right atrium. The animals were strapped to a board and following recovery from anesthesia the following measurements were taken: regional distribution of blood flow, cardiac output, O2 consumption, arterial and venous blood gases, and pH. The animal was then immersed in 15-20 degrees C water for up to 2.75 min (nutria) or 4 min (beaver) and the measurements repeated. Heart rate and cardiac output decreased by 80 and 75%, respectively. Arterial and venous oxygen partial pressure and content fell as did pH whereas CO2 pressures rose during diving. Oxygen consumption at rest was 124 and 102% of that predicted on the basis of body mass for the beaver and nutria, respectively. Rate of decline of O2 stores during diving decreased by 93% in beavers and 89% in nutria compared to the predive value. Regional blood flow decreased to all organs except the adrenals, heart, and lungs. Blood flow to the brain increased during diving.

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