SYNERGY Indications, Safety and Warnings
INDICATIONS FOR USE
The SYNERGY Everolimus-Eluting Platinum Chromium Coronary Stent System is indicated for improving luminal diameter in patients, including those with diabetes mellitus, with symptomatic heart disease, stable angina, unstable angina, non-ST elevation MI or documented silent ischemia due to atherosclerotic lesions in native coronary arteries ≥2.25 mm to ≤4.0 mm in diameter in lesions ≤34 mm in length.
Use of the SYNERGY Everolimus-Eluting Platinum Chromium Coronary Stent System is contraindicated in patients with known hypersensitivity to:
- 316L stainless steel, platinum, chromium, iron, nickel or molybdenum.
- Everolimus or structurally-related compounds
- The polymer or their individual components
Coronary Artery Stenting is contraindicated for use in:
- Patients judged to have a lesion that prevents complete inflation of an angioplasty balloon or proper placement of the stent or delivery device.
- Patients with uncorrected bleeding disorders or patients who cannot receive anticoagulation or antiplatelet aggregation therapy.
- To maintain sterility, the inner package should not be opened or damaged prior to use.
- The use of this product carries the risks associated with coronary artery stenting, including stent thrombosis, vascular complications, and/or bleeding events.
- This product should not be used in patients who are not likely to comply with recommended antiplatelet therapy.
- Consideration should be given to the risks and benefits of use in patients with history of severe reaction to contrast agents.
- Stent thrombosis is a rare event and is frequently associated with myocardial infarction (MI) or death. In the clinical trials analysed to date, differences in the incidence of stent thrombosis have not been associated with an increased risk of cardiac death, MI, or all-cause mortality.
- When DES are used outside the specified indications for Use, patient outcomes may differ from the results observed in the EVOLVE clinical trials.
- Compared to use within the specified Indications for Use, the use of DES in patients and lesions outside of the labeled indications may have an increased risk of adverse events, including stent thrombosis, stent embolization, MI or death. When treating such patients, physicians should be aware of this increased risk and consider available data and the limitations of such data.
- Orally-administered everolimus combined with cyclosporine is associated with increased serum cholesterol and triglyceride levels
Pre- and Post-Procedure Antiplatelet Regimen
The optimal duration of antiplatelet therapy, specifically P2Y12 inhibitor therapy is unknown and DES thrombosis may still occur despite continued therapy.
Oral Antiplatelet Therapy
Continuation of combination treatment with aspirin and a P2Y12 inhibitor after PCI appears to reduce major adverse cardiac events. On the basis of randomized clinical trial protocols, secondary prevention measures and expert consensus opinion, aspirin 81 mg daily should be given indefinitely after PCI. Likewise, a P2Y12 inhibitor should be given daily for at least 12 months in patients who are not at high risk of bleeding.
Full guidelines are provided at the following website: http://content.onlinejacc.org/cgi/content/full/j.jacc.2011.08.007v1
It is very important that the patient is compliant with the post-procedural antiplatelet recommendations. Premature discontinuation of prescribed antiplatelet medication could result in a higher risk of thrombosis, MI or death. Prior to PCI, if a surgical or dental procedure is anticipated that requires early discontinuation of antiplatelet therapy, the interventional cardiologist and patient should carefully consider whether a DES and its associated recommended antiplatelet therapy is the appropriate PCI choice.
The safety and effectiveness of the SYNERGY Stent in pediatric patients have not been established.
The safety and effectiveness of the SYNERGY Stent have not been established in the cerebral, carotid, or peripheral vasculature or in the following patient populations:
- Patients with vessel thrombus at the lesion site.
- Patients with coronary artery reference vessel diameters <2.25 or >4.00 mm.
- Patients with coronary artery lesions longer than 34mm or requiring more than one SYNERGY Stent.
- Patients with lesions located in saphenous vein grafts, in the left main coronary artery, ostial lesions, or complex bifurcation (e.g. bifurcation lesion requiring treatment with more than one stent).
- Patients with diffuse disease or poor flow distal to the identified lesions.
- Patients with a recent acute ST elevation myocardial infarction where there is evidence of thrombus or poor flow.
- Patients with in-stent restenosis.
- Patients with a chronic total occlusion.
- Patients with 3 vessel disease.
Magnetic Resonance Imaging (MRI) Safety Information:
Non-clinical testing has demonstrated that the SYNERGY Stent is MR Conditional for single and overlapped conditions up to 75 mm. A patient with this device can be safely scanned in a Magnetic Resonance system meeting the following conditions:
- Static magnetic field of 3.0 and 1.5 Tesla only
- Maximum spatial gradient magnetic field of 2300 gauss/cm (23 T/m)
- Maximum Magnetic Resonance system reported, whole body averaged specific absorption rate (SAR) of <2 W/kg (Normal Operating Mode)
Under the scan conditions defined above, the SYNERGY Stent is expected to produce a maximum temperature rise of 3.1oC after 15 minutes of continuous scanning.
MR Image quality may be compromised if the area of interest is within the lumen or relatively near the stent. Therefore, it may be necessary to optimize MR imaging parameters for the presence of the stent. The image artifact extends approximately 1 cm from the stent when scanned in non-clinical MR testing specified in ASTM F2119-01. The artifact does obscure the device lumen. Image artifact was minimized using the spin echo sequence vs. gradient echo.
POTENTIAL ADVERSE EVENTS
Potential adverse events (in alphabetical order) which may be associated with the use of a coronary stent in native coronary arteries include but are not limited to:
- Abrupt stent closure
- Acute myocardial infarction
- Allergic reaction to anti-coagulant and/or antiplatelet therapy, contrast medium, or stent materials
- Arrhythmias, including ventricular fibrillation and ventricular tachycardia
- Arteriovenous fistula
- Cardiac tamponade
- Cardiogenic shock/pulmonary edema
- Coronary aneurysm
- Emboli, distal (air, tissue or thrombotic material or material from device(s) used in the procedure)
- Heart failure
- Hemorrhage, which may require transfusion
- Infection, local or systemic
- Ischemia, myocardial
- Pain, access site
- Perforation or rupture of coronary artery
- Pericardial effusion
- Pseudoaneurysm, femoral
- Renal insufficiency or failure
- Respiratory failure
- Restenosis of stented segment
- Stent embolization or migration
- Stent deformation, collapse, or fracture
- Stent thrombosis/occlusion
- Stroke/cerebrovascular accident/transient ischemic attack
- Total occlusion of coronary artery
- Vessel spasm
- Vessel trauma requiring surgical repair or reintervention
Zortress™, the oral formulation of everolimus developed by Novartis Pharmaceuticals Corporation, has been evaluated in clinical trials and is approved in the United States for the prevention of organ rejection in adult kidney transplant recipients at the dose of 1.5 mg/day. Outside the U.S., Zortress is sold under the brand name, Certican™, in more than 70 countries. Everolimus is also approved in the United States under the name of Afinitor™ for patients with advanced renal cell carcinoma (cancer), after failure of treatment with sunitinib or sorafenib, at doses of 5 to 20 mg/day when taken by mouth. The following list includes the known risks of everolimus at the oral doses listed above. The amount of drug that circulates in the bloodstream following implantation of a SYNERGY™ Stent is several folds lower than that obtained with oral doses (1.5 mg to 20 mg/day).
- Abdominal pain (including upper abdominal pain
- Delayed wound healing/fluid accumulation
- Dyslipidemia (including hyperlipidemia and hypercholesterolemia)
- Dry skin
- Edema (peripheral)
- Hyperglycemia (may include new onset of diabetes)
- Increased serum creatinine
- Infections and serious infections: bacterial, viral, fungal, and protozoal infections (may include herpes virus infection, polyoma virus infection which may be associated with BK virus associated nephropathy, and/or other opportunistic infections)
- Interaction with strong inhibitors and inducers of CYP3A4
- Lymphoma and other malignancies (including skin cancer)
- Male infertility (azospermia and/or oligospermia)
- Mucosal inflammation (including oral ulceration and oral mucositis)
- Non-infectious pneumonitis
- Pain; extremity, incision site and procedural, back, chest, musculoskeletal
- Thrombotic microangiopathy (TMA/Thrombotic thrombocytopenic purpura (TTP)/Hemolytic uremic syndrome (HUS)
- Upper respiratory tract infection
- Urinary tract infection
Live vaccines should be avoided and close contact with those that have had live vaccines should be avoided. Fetal harm can occur when administered to a pregnant woman. There may be other potential adverse events that are unforeseen at this time.