Imaging and Diagnostic TestingUsefulness of an echo-contrast agent for assessment of coronary flow velocity and coronary flow velocity reserve in the left anterior descending coronary artery with transthoracic doppler scan echocardiography
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Association of coronary artery Doppler-echocardiography diastolic-systolic velocity ratio at rest with obstructive coronary artery stenosis on the left main or left anterior descending coronary artery
2019, International Journal of CardiologyCitation Excerpt :Since CFR-LAD is the stress/rest ratio of peak diastolic velocities, it requires sampling mid-distal LAD coronary velocity both at rest and at peak stress, so that if CFR-LAD has been measured during the test, the rest LAD velocity profile is available for off-line measurement rDSVR. Mid-distal LAD imaging and Doppler sampling requires to follow few steps to achieve the highest success rate (see how to description in the “Supplementary Data” in the online appendix), feasibility being generally high in the literature using standard ultrasound, but significantly increased by the use of ultrasound contrast [9,10,15,16]. Since rDSVR measurement might be perceived by operators not used to perform such measure as technically difficult and dependent on the observer, we designed a comprehensive reproducibility assessment: the same rDSVR images of 50 random tests were read and measured by 2 different observers independently (inter-observer variability) and read by the same observer twice (at least a week later) (intra-observer variability).
Usefulness of the MOSAIC (measurement of stenosis by aliasing coronary flow) method using transthoracic color Doppler echocardiography in unstable angina patients
2011, International Journal of CardiologyCitation Excerpt :During the past decade, many investigators have evaluated coronary artery disease (CAD) using coronary flow velocity reserve (CFVR) determined by transthoracic Doppler echocardiography (TTDE) [1–5].
Significance of the Distal to Proximal Coronary Flow Velocity Ratio by Transthoracic Doppler Echocardiography for Diagnosis of Proximal Left Coronary Artery Stenosis
2008, Journal of the American Society of EchocardiographyCitation Excerpt :Thus, the measurement of absolute CFV at the stenotic site alone is thought to be insufficient to identify a significant stenosis. We5 and others1,4 previously reported that CFVR had a higher sensitivity and specificity for predicting coronary stenosis than resting CFV. Therefore, the present method might be useful as a test to screen high-risk patients with coronary artery disease.
Recovery of global systolic function after primary angioplasty. Influence of coronary flow velocity reserve measured by transthoracic echocardiography
2007, International Journal of CardiologyCitation Excerpt :Nevertheless, intracoronary Doppler-derived coronary flow reserve at the time of primary coronary intervention, seems to be the best predictor for recovery of global and regional left ventricular systolic function [16]. New ultrasound systems have implemented high-frequency transducers that allow noninvasive detection of left anterior descending artery [17] and therefore, making feasible the determination of coronary flow velocity reserve [24] with a good agreement with intracoronary measurements [18]. The benefits of noninvasive measurement of coronary flow velocity reserve are obvious: repeated measurements, safety, reproducibility [25] and inexpensiveness.
Transthoracic Doppler echocardiography as a noninvasive tool to assess coronary artery stenoses-A comparison with quantitative coronary angiography
2005, Journal of the American Society of Echocardiography