Hyperemic Stenosis Resistance Index for Evaluation of Functional Coronary Lesion Severity
نویسندگان
چکیده
منابع مشابه
Hyperemic stenosis resistance index for evaluation of functional coronary lesion severity.
BACKGROUND Both coronary blood flow velocity reserve (CFVR) and myocardial fractional flow reserve (FFR) are used to evaluate the hemodynamic severity of coronary lesions. However, discordant results between CFVR and FFR have been observed in 25% to 30% of intermediate coronary lesions. An index of stenosis resistance based on a combination of intracoronary pressure and flow velocity may improv...
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Fractional flow reserve (FFR) is the ratio of distal coronary pressure to aortic pressure (Pd/Pa) across a stenosis measured during maximal hyperemia, most commonly achieved by the intracoronary or intravenous administration of adenosine. Multiple studies have demonstrated that FFR-guided revascularization improves clinical outcomes compared with angiographic guidance alone. This has resulted i...
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The measurement of coronary flow reserve, traditionally calculated as the ratio of maximal hyperemic blood flow divided by basal flow, is difficult to interpret in serial studies because fluctuating hemodynamic parameters may affect either basal or hyperemic flow measurements. To determine the magnitude of this problem and to develop alternative approaches for measuring vascular reserve, 10 ane...
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Percutaneous coronary intervention (PCI) guided by functional assessment of coronary stenoses, either noninvasively or invasively, by selective treatment of ischemia-inducing stenoses confers improved cardiovascular outcomes. We present the case of a 56-year-old man with multivessel coronary artery disease, who underwent PCI guided by invasive physiological assessment using both single modality...
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The measurement of coronary flow reserve, traditionally calculated as the ratio of maximal hyperemic blood flow divided by basal flow, is difficult to interpret in serial studies because fluctuating hemodynamic parameters may affect either basal or hyperemic flow measurements. To determine the magnitude of this problem and to develop alternative approaches for measuring vascular reserve, 10 ane...
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ژورنال
عنوان ژورنال: Circulation
سال: 2002
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.0000023041.26199.29