scholarly journals Arterial Blood Velocity Measurement by Portable Wireless System for Healthcare Evaluation: the Related Effects and Significant Reference Data

10.5772/7467 ◽  
2009 ◽  
Author(s):  
Azran Azhim ◽  
Yohsuke Kinouchi
Keyword(s):  
Velocity Measurement ◽  
Reference Data ◽  
Blood Velocity ◽  
Wireless System ◽  
Arterial Blood ◽  
Healthcare Evaluation

Measurement of Phasic Scapular and Intercostal Collateral Arterial Blood Velocity in Coarctation of the Aorta

CHEST Journal ◽  
1973 ◽  
Vol 63 (6) ◽  
pp. 1015-1016 ◽  
Author(s):  
Alberto Benchimol ◽  
Jose Baldi ◽  
Kenneth B. Desser
Keyword(s):  
Coarctation Of The Aorta ◽  
Blood Velocity ◽  
Arterial Blood

scholarly journals Influence of myocardial oxygen demand on the coronary vascular response to arterial blood gas changes in humans

2018 ◽  
Vol 315 (1) ◽  
pp. H132-H140 ◽  
Author(s):  
Tyler D. Vermeulen ◽  
Lindsey M. Boulet ◽  
Mike Stembridge ◽  
Alexandra M. Williams ◽  
James D. Anholm ◽  
...  
Keyword(s):  
Coronary Artery ◽  
Adrenergic Receptor ◽  
Blood Velocity ◽  
Rate Pressure Product ◽  
Receptor Blockade ◽  
Vascular Response ◽  
Arterial Blood ◽  
Hypercapnic Hypoxia ◽  
The Mean ◽  
Adrenergic Receptor Blockade

It remains unclear if the human coronary vasculature is inherently sensitive to changes in arterial Po2 and Pco2 or if coronary vascular responses are the result of concomitant increases in myocardial O2 consumption/demand ([Formula: see text]). We hypothesized that the coronary vascular response to Po2 and Pco2 would be attenuated in healthy men when [Formula: see text] was attenuated with β1-adrenergic receptor blockade. Healthy men (age: 25 ± 1 yr, n = 11) received intravenous esmolol (β1-adrenergic receptor antagonist) or volume-matched saline in a double-blind, randomized crossover study and were exposed to poikilocapnic hypoxia, isocapnic hypoxia, and hypercapnic hypoxia. Measurements made at baseline and after 5 min of steady state at each gas manipulation included left anterior descending coronary blood velocity (LADV; Doppler echocardiography), heart rate, and arterial blood pressure. LADV values at the end of each hypoxic condition were compared between esmolol and placebo. The rate-pressure product (RPP) and left ventricular mechanical energy (MELV) were calculated as indexes of [Formula: see text]. All gas manipulations augmented RPP, MELV, and LADV, but only RPP and MELV were attenuated (4–18%) after β1-adrenergic receptor blockade ( P < 0.05). Despite attenuated RPP and MELV responses, β1-adrenergic receptor blockade did not attenuate the mean LADV vasodilatory response compared with placebo during poikilocapnic hypoxia (29.4 ± 2.2 vs. 27.3 ± 1.6 cm/s) and isocapnic hypoxia (29.5 ± 1.5 vs. 30.3 ± 2.2 cm/s). Hypercapnic hypoxia elicited a feedforward coronary dilation that was blocked by β1-adrenergic receptor blockade. These results indicate a direct influence of arterial Po2 on coronary vascular regulation that is independent of [Formula: see text]. NEW & NOTEWORTHY In humans, arterial hypoxemia led to an increase in epicardial coronary artery blood velocity. β1-Adrenergic receptor blockade did not diminish the hypoxemic coronary response despite reduced myocardial O2 demand. These data indicate hypoxemia can regulate coronary blood flow independent of myocardial O2 consumption. A plateau in the mean left anterior descending coronary artery blood velocity-rate-pressure product relationship suggested β1-adrenergic receptor-mediated, feedforward epicardial coronary artery dilation. In addition, we observed a synergistic effect of Po2 and Pco2 during hypercapnic hypoxia.

Doppler Ultrasonic Assessment of Aortic Stenosis by Analysis of Axillary Arterial Blood Velocity Upstroke Time

CHEST Journal ◽  
1976 ◽  
Vol 70 (1) ◽  
pp. 48-50 ◽  
Author(s):  
Robert W. Barnes ◽  
Edward A. Rittenhouse ◽  
Edwin V. Miller
Keyword(s):  
Aortic Stenosis ◽  
Blood Velocity ◽  
Arterial Blood ◽  
Ultrasonic Assessment

scholarly journals In vivo whole-field blood velocity measurement techniques

2007 ◽  
Vol 42 (4) ◽  
pp. 495-511 ◽  
Author(s):  
Peter Vennemann ◽  
Ralph Lindken ◽  
Jerry Westerweel
Keyword(s):  
Velocity Measurement ◽  
Measurement Techniques ◽  
Blood Velocity

Blood Velocity Measurement by Fiber Optic Laser Doppler Anemometry

1982 ◽  
Vol BME-29 (2) ◽  
pp. 142-145 ◽  
Author(s):  
David Kilpatrick ◽  
John V. Tyberg ◽  
William W. Parmley
Keyword(s):  
Velocity Measurement ◽  
Fiber Optic ◽  
Laser Doppler Anemometry ◽  
Blood Velocity ◽  
Laser Doppler
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