Velocity tracking, a new and user independent method for detecting regional function of the left ventricle

Autor: Carl Westholm, Per Jacobsen, Matilda Larsson, Reidar Winter, Anna Bjällmark, Lars-Åke Brodin
Rok vydání: 2008
Předmět:
Adult
Male
medicine.medical_specialty
Myocardial ischemia
Time Factors
Physiology
Heart Ventricles
Myocardial Infarction
Myocardial Ischemia
Pilot Projects
USable
Tracking (particle physics)
Coronary Angiography
Sensitivity and Specificity
symbols.namesake
Electrocardiography
Ventricular Dysfunction
Left
Imaging
Three-Dimensional
Predictive Value of Tests
Physiology (medical)
Image Interpretation
Computer-Assisted
medicine
Computer Graphics
Humans
Computer vision
cardiovascular diseases
Wall motion
Aged
medicine.diagnostic_test
business.industry
Reproducibility of Results
General Medicine
Function (mathematics)
Middle Aged
Myocardial Contraction
Surgery
Echocardiography
Doppler
Color
medicine.anatomical_structure
Ventricle
Case-Control Studies
symbols
Feasibility Studies
Artificial intelligence
business
Doppler effect
Zdroj: Clinical physiology and functional imaging. 29(1)
ISSN: 1475-097X
Popis: The use of two-dimensional echocardiography (2D echo) for detection of ischaemia is limited due to high user dependency. Longitudinal motion is sensitive for ischaemia and usable for quantitative measurement of longitudinal myocardial function but time consuming. Velocity tracking (VeT) is a new method that gives an easy three-dimensional understanding of both systolic and diastolic regional motion, using colour coded bull's eye presentation of longitudinal velocity, derived from colour coded tissue Doppler. The aim of this study was to test the accuracy of VeT in detecting ischaemia in non-ST-segment elevation myocardial infarction (NSTEMI) patients bedside.Twenty patients with NSTEMI and 10 controls were included. Echocardiography was performed within 24 h of symptoms and prior to coronary angiography. Bull's eye plots presenting the peak systolic velocity (PSV) and the sum of PSV and the E-wave-velocity (PSV+E) were created using our developed software. VeT was compared to expert wall motion scoring (WMS) and bedside echo. We used the clinical conclusion based on ECG, angiography and clinical picture as 'gold standard'.Sensitivity for ischaemia with VeT (PSV+E) was 85% and specificity 60%. The corresponding sensitivities for expert WMS were 75% (specificity 40%). For regional analysis VeT and WMS showed comparable results with correct regional outcome in 11/20 of patients both superior to bedside echo.Velocity tracking is a promising technique that provides an easily understandable three-dimensional bull's eye plot for assessment of regional left ventricular longitudinal velocity with great potential for detection of regional dysfunction and myocardial ischaemia.
Databáze: OpenAIRE
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