Myocardial Infarction Clinical Trial
Official title:
Coronary Artery Plaque Characterization by NIR Spectroscopy in Patients Undergoing Elective Percutaneous Coronary Intervention
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. ;
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