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Feasibility of noninvasive transthoracic echocardiography/Doppler measurement of coronary flow reserve in left anterior descending coronary artery in patients with acute coronary syndrome: A new technique tested in clinical practice
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- Winter, Reidar (author)
- Karolinska Institutet,Lund University,Lunds universitet,Institutionen för kliniska vetenskaper, Malmö,Medicinska fakulteten,Department of Clinical Sciences, Malmö,Faculty of Medicine
- Gudmundsson, P (author)
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- Willenheimer, Ronnie (author)
- Lund University,Lunds universitet,Kardiologiska klinikens forskargrupp,Forskargrupper vid Lunds universitet,Cardiology Research Group,Lund University Research Groups
- (creator_code:org_t)
- 2003
- 2003
- English.
- In: Journal of the American Society of Echocardiography. - 1097-6795. ; 16:5, s. 464-468
- Journal article (peer-reviewed)
Abstract
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- Objective: The aim of this study was to test the feasibility and accuracy of transthoracic Doppler echocardiography measurement of coronary flow reserve (CFR) in the left anterior descending coronary artery (LAD) territory in the clinical setting of the acute coronary syndrome. Methods: Transthoracic Doppler echocardiography measurements of CFR were made in 42 consecutive patients in the distal LAD before and during adenosine infusion. The results were validated by coronary angiography. A normal CFR was predefined as a more than 2-fold increase of flow velocity during adenosine infusion. Results. We were able to detect significant stenosis in the LAD territory with 92% sensitivity and 82% specificity if we considered a stenosis greater than or equal to 50% to be significant. Defining a stenosis of greater than or equal to 70% as significant increased the sensitivity and the negative-predictive value to 100%, with a specificity of 70%. Conclusion: Measuring CFR using transthoracic Doppler echocardiography is noninvasive, feasible, accurate, and relatively inexpensive. The excellent negative-predictive value of this technique makes it a useful tool for identifying patients who can avoid repeated angiography as a result of suspected subacute LAD restenosis after percutaneous coronary intervention.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Kardiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cardiac and Cardiovascular Systems (hsv//eng)
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