Document Detail


Evaluation of human coronary blood flow with an 80 channel 20 MHz pulsed Doppler velocimeter and zero-cross and Fourier transform methods during cardiac surgery.
MedLine Citation:
PMID:  2945678     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To evaluate local blood flow velocities accurately at many sampling points in small vessels, especially in human coronary arteries, we have developed an 80 channel 20 MHz pulsed Doppler velocimeter. Doppler signals from 80 channels are detected by a zero-cross method and a signal from an optional channel is analyzed by a fast-Fourier transform method, both in real time. Basic experiments using a model and animals have demonstrated the accuracy and utility of our method of measurement of blood flow velocity for both nondisturbed and disturbed flow. Velocity waveforms in a native coronary artery beyond a vein bypass graft insertion were measured during cardiac surgery. They showed a diastolic-predominant pattern with a small systolic component. During transient graft occlusion, the waveforms changed to a systolic-predominant pattern in a patient with severe stenosis and to a to-and-fro pattern in a patient with total occlusion. In a patient with severe aortic regurgitation, the coronary arterial velocity waveforms exhibited a systolic-predominant pattern with a broad velocity spectrum. After aortic valve replacement, however, a diastolic-predominant pattern with a narrow spectrum was observed.
Authors:
F Kajiya; Y Ogasawara; K Tsujioka; M Nakai; M Goto; Y Wada; S Tadaoka; S Matsuoka; K Mito; T Fujiwara
Related Documents :
20966628 - The influence of mean blood pressure on arterial stiffening and endothelial dysfunction...
24219168 - Centrifugal blood pump for temporary ventricular assist devices with low priming and ce...
9417208 - Progressive intraventricular drop of early diastolic flow velocity reflects impaired ac...
23549998 - Physiologic and hematologic concerns of rotary blood pumps: what needs to be improved?
19021308 - Imaging pulsatile retinal blood flow in human eye.
3359908 - Stimulation of gastric acid secretion increases mucosal blood flow in immediate vicinit...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Circulation     Volume:  74     ISSN:  0009-7322     ISO Abbreviation:  Circulation     Publication Date:  1986 Nov 
Date Detail:
Created Date:  1986-11-28     Completed Date:  1986-11-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0147763     Medline TA:  Circulation     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  III53-60     Citation Subset:  AIM; IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Blood Flow Velocity*
Cardiac Surgical Procedures*
Coronary Artery Bypass
Coronary Circulation*
Fourier Analysis*
Humans
Intraoperative Period
Methods
Rheology*
Saphenous Vein / physiopathology,  transplantation
Ultrasonics*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Early results of emergency surgery after coronary angioplasty.
Next Document:  Effect of chronic infusion of atrial natriuretic factor on plasma and urinary aldosterone, plasma re...