CYPRESS - CYPHER for Evaluating Sustained Safety

Phase 4

Conditions: Coronary Artery Disease

Interventions: Drug: Placebo & Aspirin
Drug: Clopidogrel & Aspirin, Prasugrel & Aspirin

Registration Number: NCT00954707

Lead Sponsor: Cordis Corporation

Brief Summary: CYPRESS: A Prospective,Randomized,Multi-Center,Double-Blind Trial to Assess the Effectiveness and Safety of Different Durations of Dual Anti-Platelet Therapy (DAPT) in Subjects Undergoing Percutaneous Coronary Intervention with the CYPHER® Sirolimus-eluting Coronary Stent (CYPHER® Stent)

Detailed Description: During Phase I (non-randomized phase) of this study, the primary objective is to assess the rate of target lesion failure in subjects implanted with the CYPHER® stent and receiving dual antiplatelet therapy for 12 months.

During Phase II (randomized phase) of this study, the primary objective is to assess safety (major and minor bleeding), MACCE, and ST rates in subjects treated with dual antiplatelet therapy for 12 or 30 months following CYPHER® stent implantation.

\*Subjects treated with the CYPHER® 2.25mm stent will be followed through 60 months.

\*\*The last 500 patients enrolled will not be eligible for randomization.

Recruitment & Eligibility

Status: UNKNOWN

Sex: All

Target Recruitment: 2509

Inclusion Criteria

Phase I: Enrollment Inclusion Criteria

Subjects must meet ALL of the following inclusion criteria to be enrolled in the study:

The subject must be 18 years of age.
Subjects undergoing percutaneous intervention with stent deployment
Subjects without known contraindication to dual antiplatelet therapy for at least 30 months after enrollment and stent implantation.
The subject or Legally Authorized Representative has consented to participate and has authorized the collection and release of his/her medical information by signing the "Patient Informed Consent Form" that is approved by the Institutional Review Board or Independent Ethics Committee. The informed consent will be valid for the duration of the trial or until the subject withdraws.

DAPT Group Phase II: Randomization Inclusion Criterion at 12 months

Subjects must meet the following criterion to be eligible for randomization in the study:

Subject is 12 Month Clear

DAPT Group -

Exclusion Criteria

Phase I: Enrollment Exclusion Criteria

Subjects will be excluded if ANY of the following exclusion criteria apply:

Index procedure requiring use of a stent with a nominal diameter < 2.25 mm or > 3.5 mm.
Pregnant women.
Planned (at time of enrollment) surgery necessitating discontinuation of antiplatelet therapy within the 30 months following enrollment.
Current medical condition with a life expectancy of less than 3 years.
Concurrent enrollment in another device or drug study where the primary endpoint has not been reached or the device/drug might affect major endpoint outcomes in either Phase I or Phase II of the study.
The subject may only be enrolled in the study once.
Subjects on warfarin or similar anticoagulant therapy.
Subjects with hypersensitivity or allergies to one of the drugs or components indicated in the Instructions for Use for the device implanted.
Subjects unable to give informed consent.
Subject treated with both DES and BMS during the index procedure.

DAPT Group Phase II: Randomization Exclusion Criteria at 12 months

Subjects will be excluded from randomization if any of the following criteria are met:

Pregnant women.
Subject switched thienopyridine type within 6 months prior to randomization
Percutaneous coronary interventions or cardiac surgery between 6 weeks post index procedure and randomization.
Planned surgery necessitating discontinuation of antiplatelet therapy within the 21 months following randomization.
Current medical condition with a life expectancy of less than 3 years.
Subjects on subsequent warfarin or similar anticoagulant therapy.
Subjects who do not receive any CYPHER® Stent during the index procedure.

Non-DAPT Group

The following inclusion and exclusion criteria are for the Non-DAPT subjects. These criteria will be used to determine if the subject meets the near on-label definition

Non-DAPT Group - Inclusion Criteria:

Subjects must meet ALL of the following criteria to be enrolled in this study:

The subject must be ≥18 years of age
Index procedure requiring use of a stent with a nominal diameter 2.25mm to 3.5mm
Lesion Length ≤ 34mm
Up to 2 lesions in up to 2 vessels (2 in one vessel or 1 in each of 2 vessels)
Ejection fraction > 30%
Target lesion stenosis is >50% and <100% (visual estimate)
Female of childbearing potential must have a negative pregnancy test within 10 days prior to enrollment
The subject or Legally Authorized Representative has consented to participate and has authorized the collection and release of his/her medical information by signing the "Patient Informed Consent Form"

Non-DAPT Group - Exclusion criteria

And must NOT meet any of the following exclusion criteria:

Target Lesion includes Bifurcations with side branch diameter >2.5mm
Patient with excessive calcified/angulated lesion that is not suitable for stenting in the Investigator's opinion
Restenotic Target Lesion previously treated with a stent
Greater than 2 overlapping stents used to treat target lesion.
Target Lesion within an unprotected Left Main (LM) with ≥50% stenosis
Target Lesion within a coronary bypass graft (e.g., saphenous vein or arterial graft)
Chronic (> 3 months) Total Occlusion (CTO) Lesions, TIMI grade 0 or 1 in the target lesion
ST segment Elevation Myocardial Infarction (STEMI) within 30 days or non-STEMI within 72 hours
Renal insufficiency (creatinine >2.5 mg) or dialysis dependent
Lesion with visible clot
Patient with prior brachytherapy
Documented left ventricular ejection fraction is ≤30%
Pretreatment with devices other than conventional balloon angioplasty
Recipient of heart transplant
Subject with a life expectancy less than 1 year
Known allergies to the following: aspirin, all commercially available anti-platelet drugs heparin, stainless steel, contrast agent (that cannot be managed medically), or sirolimus (that cannot be managed medically);
Any significant medical condition which, in the Investigator's opinion, may interfere with the subject's optimal participation in the study;
Currently participating in an investigational drug or device study that has either not completed the primary endpoint where the prior study drug/device might affect this study's primary endpoint
In the Investigator's opinion, the lesion is not suitable for stenting.
Known bleeding or hypercoagulable disorder;
Known or suspected active infection at the time of the study procedures;
Subject is known to be pregnant
Subject is a prisoner, mentally incompetent, and/or alcohol or drug abuser;
Planned (at the time of enrollment) surgery necessitating discontinuation of anti-platelet therapy within the twelve (12) months following enrollment.

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
12m DAPT Group	Placebo & Aspirin	-
30m DAPT Group	Clopidogrel & Aspirin, Prasugrel & Aspirin	-

Primary Outcome Measures

Name	Time	Method
Phase I: the Rate of Target Lesion Failure (TLF)	12 months	Target lesion failure (TLF) is defined as clinically-driven target lesion revascularization, target vessel myocardial infarction, or cardiac death that could not be clearly attributed to a vessel other than the target vessel at 12 months.

Secondary Outcome Measures

Name	Time	Method
Rate of Device Success	From post- procedure to hospital discharge, up to 39 days	A study device success is defined as achievement of a final residual diameter stenosis of \< 50% (by QCA), using the assigned device only. If QCA is not available, the visual estimate of diameter stenosis is used.
Rate of Lesion Success	From post- procedure to hospital discharge, up to 39 days	Lesion success is defined as the attainment of \< 50% residual stenosis (by Quantitative coronary angiography (QCA)) using any percutaneous method.
Rate of Procedure Success	From post- procedure to hospital discharge, up to 39 days	Procedure success is defined as the achievement of a final diameter stenosis of \< 50% (by QCA) using any percutaneous method, without the occurrence of death, Myocardial infarction (MI), or repeat coronary revascularization of the target lesion during the hospital stay.
Rate of Clinically-driven Target Lesion Revascularization (TVR)	12 Months	Defined as any "clinically-driven" repeat percutaneous intervention of the target lesion or bypass surgery of the target vessel. Clinically-driven revascularizations are those in which the subject has a positive functional study, ischemic ECG changes at rest in a distribution consistent with the target vessel, or ischemic symptoms, and an in-lesion diameter stenosis ≥50% by QCA.
Rate of Clinically Driven Target Vessel Revascularization (TVR)	12 months	Defined as any clinically driven repeat percutaneous intervention of the target vessel or bypass surgery of the target vessel. Clinically-driven revascularizations are those in which the subject has a positive functional study, ischemic ECG changes at rest in a distribution consistent with the target vessel, or ischemic symptoms, and an in-lesion diameter stenosis ≥50% by QCA.
Rate of Target Vessel Failure (TVF)	12 Months	Defined as target vessel revascularization, recurrent infarction, or cardiac death that could not be clearly attributed to a vessel other than the target vessel.
Rate of Major Adverse Cardiac Events (MACE)	12 Months	MACE includes Death, myocardial infarction, emergent bypass surgery, or target lesion revascularization at 12 months
Rate of Protocol Defined Stent Thrombosis (ST)	12 Months	Protocol defined ST includes early and late ST. Early thrombosis is defined as composite thirty-day ischemic endpoint including death, Q-wave myocardial infarction, or subabrupt closure requiring revascularization. Late thrombosis is defined as myocardial infarction occurring \> 30 days after the index procedure and attributable to the target vessel with angiographic documentation (site reported or by qualitative coronary angiography) of thrombus or total occlusion at the target site and freedom from an interim revascularization of the target vessel.
Rate of Academic Research Consortium (ARC) Defined Stent Thrombosis (ST)	12 Months	ARC defined ST classifies ST by type - definite, probable, possible; by timing - acute, sub-acute, late, very late. Definite includes angiographic or pathologic confirmation; probable includes Any unexplained death within the first 30 days or Any MI (related to documented acute ischemia and without another obvious cause) in the territory of the stent; Possible includes Any unexplained death \> 30 days. Acute includes those ≤ 24 hours post procedure; sub-acute includes those \> 24 hours to ≤ 30 days post procedure; and late includes those \> 30 days to ≤ 1 year post procedure; and very late includes those \> 1 year post procedure.
Rate of Protocol Defined Major Bleeding Complications	12 Months	Defined by the Global Use of Strategies to Open Occluded Coronary Arteries (GUSTO) classification, including severe and moderate bleeding combined.
Rate of Cardiac Death	12 Months	Include all deaths due to cardiac causes.
Rate of Non-cardiac Death	12 Months	Include all deaths due to non-cardiac causes.