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The purpose of this study is to evaluate a near-infrared (NIR) spectroscopy system that has been designed to identify the chemical composition of coronary artery plaques in patients undergoing a percutaneous coronary intervention (PCI).
Extensive studies conducted over the past 7 years in autopsy specimens have demonstrated that NIR spectroscopy can identify the plaque structures that are suspected to cause the acute coronary artery syndromes(unstable angina, myocardial infarction, and sudden death).
The application of NIR spectroscopy to identify lipid deposition within coronary arteries has shown promising results in preclinical ex vivo studies (14). Infrared spectra are collected as follows: light of discrete wavelengths from a laser is directed onto the tissue sample via glass fibers. Light scattered from the samples is collected in fibers and launched into a spectrometer. The plot of signal intensity as a function of wavelength can be then used to develop chemometric models to discriminate lipid-rich deposits from non-atherosclerotic tissue, and from atherosclerotic tissue that is predominantly fibrotic and from blood elements. This technique is incorporated into a thin catheter with similar dimensions to an IVUS catheter, and the intracoronary dwell time for analysis is similar to the broad experience with established techniques with proven safety, such as IVUS.
Allocation: Non-Randomized, Control: Uncontrolled, Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Diagnostic
Near Infrared Spectroscopy (NIRS) Imaging, intravascular ultrasound (IVUS)
Beth Israel Deaconess Medical Center
Published on BioPortfolio: 2014-08-27T03:44:26-0400
This study is designed to evaluate the technical performance and clinical handling of a coronary catheter that includes two imaging techniques. The catheter being evaluated performs near ...
The 'Long-term Follow-up Near-infrared Spectroscopy and Intravascular Ultrasound Imaging of Internal Carotid Artery Stenosis Treated With Stenting' trial is an academic research project. I...
Both intravascular ultrasound (IVUS) and optical coherence tomography (OCT) are standardly used and have been extensively studied separately to guide percutaneous coronary intervention and...
A non inferiority trial to determine the capability of optical coherence tomography (OCT) imaging to show vessel morphology in comparison to imaging provided by intravascular ultrasound im...
The main objective is to evaluate the interest of cerebro-splanchnic oxygenation ratio (CSOR) for early diagnosis of necrotizing enterocolitis (NEC) in neonates with rectal bleeding and/or...
To evaluate the diagnostic performance of a novel computational algorithm based on three-dimensional intravascular ultrasound (IVUS) imaging in estimating fractional flow reserve (IVUS), compared to g...
This article reviews the contemporary evidence base for use of coronary intravascular ultrasound (IVUS).
Intravascular ultrasonography (IVUS) and coronary atherectomy (CA) are useful modalities in managing calcified coronary lesions. Considering an inadequacy of data, we aimed to compare the outcomes wit...
Acute myocardial infarction (AMI) secondary to spontaneous coronary artery dissection (SCAD) is a rare condition. SCAD can be underdiagnosed on a coronary angiography (CAG). Therefore, the application...
Transradial intervention (TRI) may cause damage to the radial artery (RA). We have demonstrated intima-media thickening and luminal narrowing of the distal RA after TRI using intravascular ultrasound ...
The use of ultrasound to guide minimally invasive surgical procedures such as needle ASPIRATION BIOPSY; DRAINAGE; etc. Its widest application is intravascular ultrasound imaging but it is useful also in urology and intra-abdominal conditions.
A noninvasive technique that uses the differential absorption properties of hemoglobin and myoglobin to evaluate tissue oxygenation and indirectly can measure regional hemodynamics and blood flow. Near-infrared light (NIR) can propagate through tissues and at particular wavelengths is differentially absorbed by oxygenated vs. deoxygenated forms of hemoglobin and myoglobin. Illumination of intact tissue with NIR allows qualitative assessment of changes in the tissue concentration of these molecules. The analysis is also used to determine body composition.
A technique applicable to the wide variety of substances which exhibit paramagnetism because of the magnetic moments of unpaired electrons. The spectra are useful for detection and identification, for determination of electron structure, for study of interactions between molecules, and for measurement of nuclear spins and moments. (From McGraw-Hill Encyclopedia of Science and Technology, 7th edition) Electron nuclear double resonance (ENDOR) spectroscopy is a variant of the technique which can give enhanced resolution. Electron spin resonance analysis can now be used in vivo, including imaging applications such as MAGNETIC RESONANCE IMAGING.
A spectroscopic technique in which a range of wavelengths is presented simultaneously with an interferometer and the spectrum is mathematically derived from the pattern thus obtained.
The use of molecularly targeted imaging probes to localize and/or monitor biochemical and cellular processes via various imaging modalities that include RADIONUCLIDE IMAGING; ULTRASONOGRAPHY; MAGNETIC RESONANCE IMAGING; fluorescence imaging; and MICROSCOPY.
Cardiovascular disease (CVD)
Acute Coronary Syndromes (ACS) Blood Cardiovascular Dialysis Hypertension Stent Stroke Vascular Cardiovascular disease (CVD) includes all the diseases of the heart and circulation including coronary heart disease (angina...
Acute Coronary Syndromes ACS
Acute Coronary Syndromes (ACS) is an umbrella term for situations where the blood supplied to the heart muscle is suddenly blocked. Treatment for acute coronary syndrome includes medicines and a procedure known as angioplasty, during which doctors inflat...