Velocity distribution model for normal blood flow in the human ascending aorta

1991 ◽  
Vol 29 (5) ◽  
pp. 489-492 ◽  
Author(s):  
L. Segadal
Keyword(s):  
Blood Flow ◽  
Velocity Distribution ◽  
Ascending Aorta ◽  
Normal Blood ◽  
Distribution Model ◽  
Normal Blood Flow

Can Long Decellularized Homografts Restore Normal Blood Flow in the Ascending Aorta? A 4D-Flow CMR Study

2021 ◽  
Author(s):  
T. Cvitkovic ◽  
A. Horke ◽  
M. Avsar ◽  
D. Bobylev ◽  
P. Beerbaum ◽  
...  
Keyword(s):  
Blood Flow ◽  
Ascending Aorta ◽  
Normal Blood ◽  
4D Flow ◽  
4D Flow Cmr ◽  
Normal Blood Flow

scholarly journals Bioenergetics of contracting skeletal muscle after partial reduction of blood flow

1998 ◽  
Vol 84 (6) ◽  
pp. 1882-1888 ◽  
Author(s):  
Michael C. Hogan ◽  
L. Bruce Gladden ◽  
Bruno Grassi ◽  
Creed M. Stary ◽  
Michele Samaja
Keyword(s):  
Blood Flow ◽  
Steady State ◽  
Force Production ◽  
Normal Blood ◽  
Normal Flow ◽  
Contracting Muscle ◽  
Time Index ◽  
Atp Concentration ◽  
Tension Time ◽  
Normal Blood Flow

The purpose of this study was to examine the bioenergetics and regulation of O2 uptake (V˙o 2) and force production in contracting muscle when blood flow was moderately reduced during a steady-state contractile period. Canine gastrocnemius muscle ( n = 5) was isolated, and 3-min stimulation periods of isometric, tetanic contractions were elicited sequentially at rates of 0.25, 0.33, and 0.5 contractions/s (Hz) immediately followed by a reduction of blood flow [ischemic (I) condition] to 46 ± 3% of the value obtained at 0.5 Hz with normal blood flow. TheV˙o 2 of the contracting muscle was significantly ( P < 0.05) reduced during the I condition [6.5 ± 0.8 (SE) ml ⋅ 100 g−1 ⋅ min−1] compared with the same stimulation frequency with normal flow (11.2 ± 1.5 ml ⋅ 100 g−1 ⋅ min−1), as was the tension-time index (79 ± 12 vs. 123 ± 22 N ⋅ g−1 ⋅ min−1, respectively). The ratio ofV˙o 2 to tension-time index remained constant throughout all contraction periods. Muscle phosphocreatine concentration, ATP concentration, and lactate efflux were not significantly different during the I condition compared with the 0.5-Hz condition with normal blood flow. However, at comparable rates of V˙o 2 and tension-time index, muscle phosphocreatine concentration and ATP concentration were significantly less during the I condition compared with normal-flow conditions. These results demonstrate that, in this highly oxidative muscle, the normal balance of O2 supply to force output was maintained during moderate ischemia by downregulation of force production. In addition, 1) the minimal disruption in intracellular homeostasis after the initiation of ischemia was likely a result of steady-state metabolic conditions having already been activated, and 2) the difference in intracellular conditions at comparable rates ofV˙o 2 and tension-time index between the normal flow and I condition may have been due to altered intracellular O2 tension.

scholarly journals RENAL HYPERTENSION PRODUCED BY AN AMINO ACID

1941 ◽  
Vol 74 (3) ◽  
pp. 235-246 ◽  
Author(s):  
Richard J. Bing ◽  
Marjorie B. Zucker
Keyword(s):  
Blood Pressure ◽  
Blood Flow ◽  
Amino Acid ◽  
Renal Hypertension ◽  
Normal Blood ◽  
Normal Blood Flow

Acute renal hypertension is produced by the injection of the amino acid dopa (l-dihydroxyphenylalanine) into the partially or completely ischemic kidney of the cat. Evidence is presented suggesting that the rise in blood pressure following the injection of dopa is caused by its conversion into hydroxytyramine, a pressor amine. Kidneys with normal blood flow fail to transform dopa into a pressor substance.

Normal Blood Flow Response and Vasomotion in the Diabetic Charcot Foot

1998 ◽  
Vol 12 (3) ◽  
pp. 147-153 ◽  
Author(s):  
Shane A. Shapiro ◽  
Kevin B. Stansberry ◽  
Michael A. Hill ◽  
Martin D. Meyer ◽  
Patricia M. McNitt ◽  
...  
Keyword(s):  
Blood Flow ◽  
Normal Blood ◽  
Charcot Foot ◽  
Blood Flow Response ◽  
Flow Response ◽  
Normal Blood Flow

scholarly journals Re-establishment of normal blood flow is mandatory to restore intramuscular high energy phosphate levels after transient ischemia

2008 ◽  
Vol 8 (Suppl 1) ◽  
pp. A52
Author(s):  
Martin Andreas ◽  
Albrecht I Schmid ◽  
Daniel Doberer ◽  
Martin Meyerspeer ◽  
Ewald Moser ◽  
...  
Keyword(s):  
Blood Flow ◽  
High Energy ◽  
Normal Blood ◽  
High Energy Phosphate ◽  
Transient Ischemia ◽  
Normal Blood Flow

scholarly journals Continuous angiotensin II infusion increases tumour: normal blood flow ratio in colo-rectal liver metastases

2001 ◽  
Vol 85 (11) ◽  
pp. 1640-1645 ◽  
Author(s):  
D Burke ◽  
M M Davies ◽  
J Zweit ◽  
M A Flower ◽  
R J Ott ◽  
...  
Keyword(s):  
Blood Flow ◽  
Angiotensin Ii ◽  
Liver Metastases ◽  
Normal Blood ◽  
Flow Ratio ◽  
Blood Flow Ratio ◽  
Normal Blood Flow
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