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Diagnostics of main coronary artery stenoses and occlusions: multiplane transoesophageal Doppler echocardiographic assessment.

https://arctichealth.org/en/permalink/ahliterature53775
Source
Eur J Echocardiogr. 2001 Sep;2(3):170-7
Publication Type
Article
Date
Sep-2001
Author
A V Vrublevsky
A A Boshchenko
R S Karpov
Author Affiliation
Cardiology Research Institute, Tomsk, Russian Academy of Medical Sciences, Siberian Branch, Russia. alexvr@mail.tomsknet.ru
Source
Eur J Echocardiogr. 2001 Sep;2(3):170-7
Date
Sep-2001
Language
English
Publication Type
Article
Keywords
Blood Flow Velocity
Comparative Study
Coronary Angiography
Coronary Arteriosclerosis - radiography - ultrasonography
Coronary Circulation
Echocardiography, Doppler
Echocardiography, Transesophageal
Humans
Male
Middle Aged
Sensitivity and specificity
Abstract
AIM AND METHODS: The possibility of using multiplane transoesophageal echocardiography (TEE) and quantitative coronary angiography (QCA) in the diagnostics of stenotic atherosclerosis of the main coronary arteries in a comparative aspect were studied in 94 patients with coronary artery disease (men, mean age 52 +/- 7 years). Coronary arteries stenoses were calculated with Doppler echocardiography using a modified continuity equation: stenosis (%)=100 x(1-prestenotic VTI(d)/stenotic VTI(d)) where prestenotic VTI(d), (cm)=diastolic velocity integral in the prestenotic zone, and stenotic VTI(d), (cm)=in the trans-stenotic zone. RESULTS: High sensitivity and specificity of TEE in the diagnostics of stenotic and occlusive atherosclerosis of coronary arteries were revealed. They measured 88% and 98% for the left main coronary artery (LMCA), 97% and 67% for the left descending artery (LDA), 95% and 92% for the circumflex artery (CX), 83% and 97% for the right coronary artery (RCA), respectively. A high correlation was found between the results of TEE and QCA in the diagnostics of coronary stenoses which were made for the LMCA (r=0.82P 50%) according to a peak diastolic velocity of the coronary blood flow, calculated as 1.4m.s(-1)for the LMCA, 0.9m.s(-1)for the LDA, and 1.1m.s(-1)for the CX. We determined Doppler echocardiography criteria of coronary arteries occlusions such as a 'break' of colour mapping, absence of Doppler spectrum and retrograde blood flow during late diastole. CONCLUSION: Transoesophageal Doppler evaluation of coronary blood flow with application of a modified continuity equation is an accurate, non-invasive method of coronary arteries stenoses diagnostics.
Notes
Comment In: Eur J Echocardiogr. 2001 Sep;2(3):145-711882445
PubMed ID
11882450 View in PubMed
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Simultaneous transesophageal Doppler assessment of coronary flow reserve in the left anterior descending artery and coronary sinus allows differentiation between proximal and non-proximal left anterior descending artery stenoses.

https://arctichealth.org/en/permalink/ahliterature53353
Source
Eur J Echocardiogr. 2004 Jan;5(1):25-33
Publication Type
Article
Date
Jan-2004
Author
A V Vrublevsky
A A Boshchenko
R S Karpov
Author Affiliation
Cardiology Research Institute, Russian Academy of Medical Sciences, Siberian Branch, Tomsk, Russia. alexvr@mail.tomsknet.ru
Source
Eur J Echocardiogr. 2004 Jan;5(1):25-33
Date
Jan-2004
Language
English
Publication Type
Article
Keywords
Adult
Analysis of Variance
Blood Flow Velocity
Case-Control Studies
Coronary Angiography
Coronary Circulation - physiology
Coronary Stenosis - radiography - ultrasonography
Coronary Vessels - pathology - ultrasonography
Dipyridamole - diagnostic use
Echocardiography, Doppler - methods
Echocardiography, Transesophageal - methods
Heart Function Tests
Hemodynamic Processes - physiology
Humans
Male
Middle Aged
Probability
Reference Values
Sampling Studies
Sensitivity and specificity
Stroke Volume - physiology
Abstract
AIM AND METHODS: The role of simultaneous transesophageal Doppler assessment of coronary flow reserve (CFR) in the left anterior descending artery (LAD) and coronary sinus (CS) in the diagnostics of hemodynamically significant LAD stenoses of various localization was studied in 16 CAD patients with angiographically proven >50% stenotic atherosclerosis of the LAD (nine--in the proximal third, seven--in the mid and/or distal third) and 23 healthy volunteers (all men). Dipyridamole was used as a stress agent. The diastolic phase of coronary flow in the LAD and the antegrade phase of coronary flow in the CS were analyzed. CFR in the LAD and CS was calculated in two ways: one--as ratio of peak hyperemic flow velocity to the peak baseline blood flow velocity (CFR by Vp); two--as ratio of volume hyperemic blood flow velocity to the volume baseline blood flow velocity (CFR by VBF). The level of the CFR
PubMed ID
15113009 View in PubMed
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