Evaluation of a Combined Near Infrared Spectroscopy (NIRS) and Intravascular Ultrasound (IVUS) Catheter for Detection of Lipid Rich Plaque
Evaluation of a Combined Near Infrared Spectroscopy (NIRS) and Intravascular Ultrasound (IVUS) Catheter for Detection of Lipid Rich Plaque
The purpose of this study is to learn more about lipid rich plaque using Near Infrared
 Spectroscopy (NIRS)/Intravascular Ultrasound (IVUS) imaging in patients who have had coronary
 artery stenting and Optical coherence tomography (OCT) imaging.
The aims of this study are to:

 1. Test the ability of the new NIRS IVUS system to detect lipid pool

 2. Evaluate the accuracy of the NIRS IVUS system for localization of lipide rich plaque:
 superficial vs deep

 3. Improve diagnostic accuracy of OCT for detection of lipid using information from NIRS
 IVUS
Inclusion Criteria:

 Patient Characteristics

 1. Males and non-pregnant females > 18 and < 79 years of age

 2. Patients referred for diagnostic coronary angiography who are found to have lesions in
 native coronary arteries which will be treated by percutaneous coronary intervention
 (PCI) (or patients with known coronary lesions who are referred for planned PCI)

 3. Able to give written informed consent

 Lesion Characteristics

 1. Lesion in native coronary artery

 2. Angiographic stenosis > 50%

 3. Reference vessel diameter 2.5 mm - 4.0 mm by visual estimation

 4. Subjects who have successful PCI and OCT

 General Exclusion Criteria

 1. Subjects who are unable or unwilling to sign the informed consent form

 2. Subjects with serious co-morbid conditions that in judgment of the investigator
 preclude inclusion in this study (such as terminal cancer, life expectancy < 6 months,
 Liver Function Tests (LFTs) > 3 times Upper Limit of Normal (ULN), or post-transplant)

 3. Subjects with New York Heart Association (NYHA) class III or IV heart failure or known
 left ventricular ejection fraction < 30%

 4. Subjects who have experienced an ST-elevation myocardial infarction (STEMI) within 72
 hours prior to the procedure

 5. Subjects with hemodynamic or electrical instability (including shock)

 6. Subjects diagnosed with severe, non-catheter-related coronary artery spasm

 7. Subjects who are or may be pregnant

 8. Subjects with known allergies to contrast media

 9. Subjects with renal failure as defined by estimated Glomerular Filtration Rate (eGFR)
 < 60.

 10. History of Transient Ischemic Attack (TIA) or stroke < 6 months

 Lesion Specific Exclusion Criteria These exclusion criteria apply to the target lesion to
 be imaged by NIRS IVUS.

 1. Lesion located in the left main coronary artery

 2. Lesions that are heavily calcified

 3. Lesions where OCT cannot be performed due to technical difficulties

 4. Other lesions that the investigator deems inappropriate for the procedure such as
 lesions with excessive tortuosity, presence of thrombus, low flow by TIMI grade.