Absorb III Physician
Paul Gordon, MD, The Miriam Hospital
A Clinical Evaluation of Absorb™ BVS, the Everolimus Eluting Bioresorbable Vascular Scaffold in the Treatment of Subjects with de novo Native Coronary Artery Lesions
The Absorb BVS is a bioresorbable balloon-expandable scaffold with a drug and bioresorbable polymer coating. After implantation, the scaffold supports the vessel mechanically for an appropriate period. It is then resorbed in the body and the polymer material becomes undetectable over time. In contrast, currently available commercial coronary stents are made of metal, which resides permanently in the body. Additionally, bioresorbable scaffolds can act as a vehicle for local therapy and are amenable to non-invasive cardiovascular imaging. Subjects registered into this clinical investigation will be male and female subjects derived from the general interventional cardiology population.
The design of this study is to revascularize obstructed coronary arteries and ultimately restore the implanted vessel to an unconstrained state potentially capable of dilating and contracting in response to changes in blood flow requirements.
The primary objective of the Absorb III Cohort will evaluate the safety and effectiveness of the Absorb BVS System compared to the XIENCE in the treatment of subjects, including those with diabetes mellitus, with ischemic heart disease caused by up to two de novo native coronary artery lesions in separate epicardial vessels. Approximately 2250 subjects will be registered in the Absorb RCT. Of this total number, up to 50 subjects will be registered in the Lead-In phase (this phase is now closed), 2000 subjects will be registered in the Absorb III Cohort, and 200 subjects will be registered in the Absorb Imaging Cohort. The sponsor of the study is Abbott Cardiovascular, Inc.General Inclusion Criteria
1. Subject must be at least 18 years of age.
2. Subject or a legally authorized representative must provide written Informed Consent prior to any study related procedure, per site requirements.
3. Subject must have evidence of myocardial ischemia (e.g., stable, unstable angina, post-infarct angina or silent ischemia) suitable for elective PCI. Subjects with stable angina or silent ischemia and < 70% diameter stenosis must have objectives sign of ischemia as determined by one of the following, echocardiogram, nuclear scan, ambulatory ECG or stress ECG). In the absence of noninvasive ischemia, FFR must be done and indicative of ischemia.
4. Subject must be an acceptable candidate for coronary artery bypass graft (CABG) surgery.
5. Female subject of childbearing potential who does not plan pregnancy for up to 1 year following the index procedure. For a female subject of childbearing potential a pregnancy test must be performed with negative results known within 7 days prior to the index procedure per site standard.
6. Female subject is not breast-feeding at the time of the screening visit and will not be breast-feeding for up to 1 year following the index procedure.
7. Subject agrees to not participate in any other investigational or invasive clinical study for a period of 1 year following the index procedure.1
1 This includes clinical trials of medications and invasive procedures. Questionnaire-based studies, or other studies that are non-invasive and do not require medication are allowed. A subject who is taking part in the long-term follow-up phase of a trial, who has completed all medications and invasive procedures per protocol requirements, may continue to participate in that trial.
General Exclusion Criteria
1. Any surgery requiring general anesthesia or discontinuation of aspirin and/or an ADP antagonist is planned within 12 months after the procedure.
2. Subject has known hypersensitivity or contraindication to device material and its degradants (everolimus, poly (L-lactide), poly (DL-lactide), lactide, lactic acid) and cobalt, chromium, nickel, platinum, tungsten, acrylic and fluoro polymers that cannot be adequately pre-medicated. Subject has a known contrast sensitivity that cannot be adequately pre-medicated.
3. Subject has known allergic reaction, hypersensitivity or contraindication to aspirin; or to clopidogrel and prasugrel and ticagrelor; or to heparin and bivalirudin, and therefore cannot be adequately treated with study medications.
4. Subject had an acute myocardial infarction (AMI: STEMI or NSTEMI) within 72 hours of the index procedure and both CK and CK-MB have not returned to within normal limits at the time of index procedure.
5. Subject is currently experiencing clinical symptoms consistent with new onset AMI (STEMI or NSTEMI), such as nitrate-unresponsive prolonged chest pain with ischemic ECG changes.
6. Subject has a cardiac arrhythmia as identified at the time of screening for which at least one of the following criteria is met:2
a. Subject requires coumadin or any other agent for chronic oral anticoagulation
b. Subject is likely to become hemodynamically unstable due to their arrhythmia
c. Subject has poor survival prognosis due to their arrhythmia
7. Subject has a left ventricular ejection fraction (LVEF) < 30% assessed by any quantitative method, including but not limited to echocardiography, MRI, Multiple-Gated Acquisition (MUGA) scan, contrast left ventriculography, PET scan, etc. LVEF may be obtained within 6 months prior to the procedure for subjects with stable CAD. For subjects presenting with ACS, LVEF must be assessed during the index hospitalization (which may include during the index procedure by contrast left ventriculography) but prior to randomization in order to confirm the subject’s eligibility.
8. Subject has undergone prior PCI within the target vessel during the last 12 months. Prior PCI within the non-target vessel or any peripheral intervention is acceptable if performed anytime >30 days before the index procedure, or between 24 hours and 30 days before the index procedure if successful and uncomplicated.
9. Subject requires future staged PCI either in target or non-target vessels or subject requires future peripheral interventions < 30 days after the index procedure.
10. Subject has received any solid organ transplants or is on a waiting list for any solid organ transplants.
11. At the time of screening, the subject has a malignancy that is not in remission.
2 Investigator should use discretion when enrolling subjects with high CHADS scores.
12. Subject is receiving immunosuppressant therapy or has known immunosuppressive or autoimmune disease (e.g., human immunodeficiency virus, systemic lupus erythematosus, etc.). Note: corticosteroids are not included as immunosuppressant therapy.
13. Subject has previously received or is scheduled to receive radiotherapy to a coronary artery (vascular brachytherapy), or the chest/mediastinum.
14. Subject is receiving or will require chronic anticoagulation therapy (e.g., coumadin, dabigatran, apixaban, rivaroxaban or any other agent for any reason).
15. Subject has a platelet count < 100,000 cells/mm3 or > 700,000 cells/mm3.
16. Subject has a documented or suspected hepatic disorder as defined as cirrhosis or Child-Pugh ≥ Class B.
17. Subject has renal insufficiency as defined as an estimated GFR < 30 ml/min/1.73m2 or dialysis at the time of screening. 3
18. Subject is high risk of bleeding for any reason; has a history of bleeding diathesis or coagulopathy; has had a significant gastro-intestinal or significant urinary bleed within the past six months.
19. Subject has had a cerebrovascular accident or transient ischemic neurological attack (TIA) within the past six months, or any prior intracranial bleed, or any permanent neurologic defect, or any known intracranial pathology (e.g., aneurysm, arteriovenous malformation, etc.).
20. Subject has extensive peripheral vascular disease that precludes safe 6 French sheath insertion. Note: femoral arterial disease does not exclude the patient if radial access may be used.
21. Subject has life expectancy < 5 years for any non-cardiac cause or cardiac cause.
22. Subject is in the opinion of the Investigator or designee, unable to comply with the requirements of the study protocol or is unsuitable for the study for any reason. This includes completion of Patient Reported Outcome instruments.
23. Subject is currently participating in another clinical trial that has not yet completed its primary endpoint. 4
24. Subject is part of a vulnerable population who, in the judgment of the investigator, is unable to give Informed Consent for reasons of incapacity, immaturity, adverse personal circumstances or lack of autonomy. This may include: Individuals with mental disability, persons in nursing homes, children, impoverished persons, persons in emergency situations, homeless persons, nomads, refugees, and those incapable of giving informed consent. Vulnerable populations also may include members of a group with a hierarchical structure such as university students, subordinate hospital and laboratory personnel, employees of the Sponsor, members of the armed forces, and persons kept in detention.
3 Estimated GFR can be based on Modification of Diet in Renal Disease (MDRD) equation or Cockcroft-Gault equation (CCG).
4 This includes clinical trials of medications and invasive procedures. Questionnaire-based studies, or other studies that are non-invasive and do not require medication are allowed. A subject who is taking part in the long-term follow-up phase of a trial, who has completed all medications and invasive procedures per protocol requirements, may continue to participate in that trial.
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