Parametric quantification of myocardial ischaemia using real-time perfusion adenosine stress echocardiography images, with SPECT as reference method
Autor: | Ronnie Willenheimer, Reidar Winter, Ola Thorsson, Mariusz Kitlinski, Magnus Dencker, Kambiz Shahgaldi, Petri Gudmundsson, Lennart Ljunggren |
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Rok vydání: | 2010 |
Předmět: |
Male
Adenosine Physiology Myocardial Ischemia Ischemia Sensitivity and Specificity Predictive Value of Tests Physiology (medical) Stress Echocardiography Humans Medicine Prospective Studies Circumflex Aged Tomography Emission-Computed Single-Photon Receiver operating characteristic medicine.diagnostic_test business.industry Area under the curve Reproducibility of Results General Medicine Blood flow Middle Aged Reference Standards medicine.disease Echocardiography Exercise Test Female Artifacts business Nuclear medicine Perfusion Software Emission computed tomography |
Zdroj: | Clinical Physiology and Functional Imaging. 30:30-42 |
ISSN: | 1475-097X 1475-0961 |
Popis: | Summary Background: Real-time perfusion (RTP) adenosine stress echocardiography (ASE) can be used to visually evaluate myocardial ischaemia. The RTP power modulation technique, provides images for off-line parametric perfusion quantification using Qontrast((R)) software. From replenishment curves, this generates parametric images of peak signal intensity (A), myocardial blood flow velocity (beta) and myocardial blood flow (Axbeta) at rest and stress. This may be a tool for objective myocardial ischaemia evaluation. We assessed myocardial ischaemia by RTP-ASE Qontrast((R))-generated images, using 99mTc-tetrofosmin single-photon emission computed tomography (SPECT) as reference. Methods: Sixty-seven patients admitted to SPECT underwent RTP-ASE (SONOS 5500) during Sonovue((R)) infusion, before and throughout adenosine stress, also used for SPECT. Quantitative off-line analyses of myocardial perfusion by RTP-ASE Qontrast((R))-generated A, beta and Axbeta images, at different time points during rest and stress, were blindly compared to SPECT. Results: We analysed 201 coronary territories [corresponding to the left anterior descendent (LAD), left circumflex (LCx) and right coronary (RCA) arteries] from 67 patients. SPECT showed ischaemia in 18 patients. Receiver operator characteristics and kappa values showed that A, beta and Axbeta image interpretation significantly identified ischaemia in all territories (area under the curve 0.66-0.80, P = 0.001-0.05). Combined A, beta and Axbeta image interpretation gave the best results and the closest agreement was seen in the LAD territory: 89% accuracy; kappa 0.63; P |
Databáze: | OpenAIRE |
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