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Coronary Artery DiseasePhase 4ISAR-REACT-3ANCT00735280

Reduced Dose of Unfractionated Heparin in Patients Undergoing PCI

A Phase 4 study testing unfractionated heparin in people with Coronary Artery Disease, run by Deutsches Herzzentrum Muenchen at 3 sites in Germany.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The aim of this trial is to evaluate whether a reduction in the heparin dose from 140 to 100 U/kg is associated with a better net clinical outcome in patients undergoing PCI after pretreatment with 600mg clopidogrel Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Coronary Artery Disease
What is being tested?
unfractionated heparin
Could I receive a placebo?
No, everyone receives an active treatment
How many people
2,505 participants
Where
3 sitesGermany
Study dates
Aug 2008to Mar 2011
Phase
Phase 4
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Patients older than 18 years undergoing a PCI procedure
  • Pretreatment with 600mg clopidogrel at least 2 hours before the intervention
  • Informed, written consent by the patient or her/his legally-authorized representative for participation in the study.

Who cannot join

  • Recent ST-elevation myocardial infarction within the last 48 hours
  • Acute coronary syndromes with positive biomarkers (Troponin T > 0.03 μg/L or CK-MB > ULN)
  • Cardiogenic shock
  • Malignancies or other comorbid conditions (for example severe liver, renal and pancreatic disease) with life expectancy less than one year or that may result in protocol non-compliance
  • Active bleeding; bleeding diathesis
  • History of gastrointestinal or genitourinary bleeding within the last 6 weeks
Show all 26Show fewer
  • Presence of diseases which have a high probability of vascular lesions and subsequent bleeding such as active gastric ulcer or active ulcerous colitis
  • Recent trauma or major surgery in the last month
  • Ophthalmic surgery or brain surgery in the last month
  • Retinopathies or vitreous body bleeding in the last month
  • History of intracranial bleeding or structural abnormalities (for example aneurysm of cerebral arteries)
  • Suspected aortic dissection; pericarditis and subacute bacterial endocarditis
  • Patient's refusal to blood transfusion.
  • Oral anticoagulation therapy with coumarin derivative within the last 7 days
  • Treatment with UFH within 6 hours unless an ACT is less than 150 sec or low-molecular weight heparin within 8 hours before enrollment
  • Treatment with bivalirudin within 24 hours before enrollment
  • Severe uncontrolled hypertension >180/110 mmHg unresponsive to therapy
  • Planned staged PCI procedure within 30 days from index procedure or prior PCI within the last 30 days.
  • Relevant hematologic deviations: hemoglobin < 100 g/L, platelet count < 100 x 109 /L.
  • Glomerular filtration rate (GFR) < 30 ml/min or serum creatinine > 30 mg/L or dependence on renal dialysis.
  • Known allergy to the study medications: aspirin, clopidogrel, UFH, true anaphylaxis after prior exposure to contrast media.
  • Known heparin-induced thrombocytopenia (Typ II)
  • Previous enrollment in this trial.
  • Pregnancy (present, suspected or planned) or positive pregnancy test.
  • Spinal, peridural and epidural anesthesia
  • Patient's inability to fully cooperate with the study protocol.

Trial locations and contacts

3 sites in 1 country.

Germany3 sites

  • Herz-Zentrum

    Bad Krozingen, 79189

  • Deutsches Herzzentrum München

    München, 81541

  • Klinikum rechts der Isar der Technischen Universität München

    München, 81675

Other trials in Germany

About this study

Official title: Non-randomized, Open-label, Historical Control, Single Group Assignment Trial of a Reduced Dose of Unfractionated Heparin in Patients Undergoing Percutaneous Coronary Interventions

The aim of this trial is to evaluate whether a reduction in the heparin dose from 140 to 100 U/kg is associated with a better net clinical outcome in patients undergoing PCI after pretreatment with 600mg clopidogrel

Read the detailed description

Percutaneous coronary interventions, mostly with implantation of bare-metal or drug-eluting stents, are commonly used to treat patients with coronary artery disease. Various periprocedural adjunct antithrombotic therapies have been investigated and are being used. Unfractionated heparin (UFH) has been the standard adjunctive antithrombin therapy during PCI for more than 25 years. Combined antiplatelet treatment consisting of aspirin and a thienopyridine has significantly reduced early ischaemic events following coronary stenting (1). Thienopyridines act by irreversibly inhibiting the platelet adenosine diphosphate (ADP) P2Y12 receptor. Compared to ticlopidine, clopidogrel has the advantage of a more favourable side effect profile (2) and more rapid onset of action.(3,4) Pretreatment with a loading dose of 300mg clopidogrel improved outcomes (5-7) and is recommended by current guidelines for patients undergoing PCI. (8) More recently, trials have shown that the larger loading dose of 600mg achieves more rapid and more potent inhibition of platelet aggregation than 300 mg do.(9-11) The results of several randomized controlled trials suggest that pretreatment with 600mg clopidogrel might obviate the need for IIb/IIIa inhibitors in a broad spectrum of patients undergoing PCI (12-14) although no formal direct comparison of different clopidogrel doses has been assessed by trials sufficiently powered for clinical endpoints. The Intracoronary Stenting and Antithrombotic Regimen-Rapid Early Action for Coronary Treatment (ISAR-REACT) trial showed that after pretreatment with 600mg clopidogrel for at least 2 hours before the intervention, additional use of abciximab was not associated with any clinically measurable benefit among low-to-intermediate risk patients who underwent PCI.(12) Even in higher risk settings such as small vessel size (14) and the presence of diabetes (13)additional use of abciximab was not associated with a measurable clinical benefit in patients pretreated with 600mg clopidogrel. An important exception is the group of patients with non-ST-segment elevation ACS. In the ISAR-REACT-2 trial that enrolled this category of patients those with an elevated troponin level did benefit from abciximab even after pretreatment with 600mg clopidogrel.(15) The recently completed ISAR-REACT-3 trial compared unfractionated heparin with the direct thrombin inhibitor bivalirudin in biomarker negative patients with stable and unstable angina undergoing contemporary PCI. Bivalirudin did not provide "net clinical benefit" - did not reduce the quadruple endpoint - at 30 days compared to unfractionated heparin. However, there was a significant reduction in bleeding with bivalirudin (16) The heparin dose regimen used in ISAR-REACT-3 diverges from current US practice insofar as the majority of patients received a bolus dose of 140 U/kg with no follow up ACT measurement and no additional heparin doses. Although heparin has been the standard antithrombin therapy in interventional cardiology for decades, its optimal dose is still not known. During the last years there has been a trend towards using lower heparin doses. In most interventional trials in the United States it is now current practice to use a bolus of not more than 100 U/kg. (8) Many interventionalists believe that a dose lower than 140 U/kg is associated with a better clinical outcome. However, no studies have been performed to identify the most appropriate dose of heparin. Since pretreatment with clopidogrel has proven to reduce ischemic events, a heparin dose of 140U/kg might conceivably be too high. A lower dose might prove to be as effective in preventing ischemic endpoints while reducing the risk of bleeding if patients were pretreated with 600mg clopidogrel prior to the intervention. Therefore the aim of this trial is to evaluate whether a reduction in the heparin dose from 140 to 100 U/kg is associated with a better net clinical outcome in patients undergoing PCI after pretreatment with 600mg clopidogrel. The hypothesis to be tested is whether a reduced dose of 100U/kg heparin is superior to the higher dose of 140U/kg used in the ISAR-REACT-3 trial (historical control) regarding the combined incidence of death, myocardial infarction, urgent target vessel revascularization within 30 days and in hospital major bleeding. The ISAR-REACT-3a trial will enroll a patient population with a similar risk profile to that of patients included in ISAR-REACT-3. Biomarker negative patients with stable or unstable angina undergoing PCI will receive a reduced dose heparin bolus of 100U/kg. Results will be compared with the ISAR-REACT-3 trial (historical control). Primary comparison will be with the heparin arm of ISAR-REACT-3 regarding the primary endpoint ("Net clinical benefit", the combined incidence of death, myocardial infarction, urgent target vessel revascularization within 30 days and in hospital major bleeding). A secondary aspect will be the comparison with the historical bivalirudin group of the ISAR-REACT-3 trial.

Being tested
unfractionated heparin
Keywords
Coronary artery disease, stent, heparin
Medical subject headings
Coronary Artery Disease

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • unfractionated heparinDrug

    bolus of 100 U/kg of unfractionated heparin

Study groups in NCT00735280
Study groupRoleWhat they receive
Reduced dose of unfractionated heparinExperimentalNot described
Receives: Drug: unfractionated heparin

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. The primary outcome measure will be a composite of death, MI, urgent TVR after 30 days or in hospital bleeding (quadruple endpoint, "net clinical benefit").

    Measured: 30 days

Secondary outcomes (2)

  1. Composite of death, MI or urgent TVR (Triple endpoint to assess ischemic complications)

    Measured: 30 days

  2. Composite of death, MI or TVR

    Measured: 1 year after the index procedure

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted14 Aug 2008 (estimated)
  2. Study startAug 2008
  3. Primary completionMar 2010
  4. Study completionMar 2011

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 4
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
2,505 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00735280
Sponsor's protocol ID
GE IDE No. A01408
Acronym
ISAR-REACT-3A
Status last verified
Jan 2012
First submitted
12 Aug 2008
Last updated
5 Jan 2012
Results posted
No
Data monitoring committee
No

Publications

  • Schomig A, Neumann FJ, Kastrati A, Schuhlen H, Blasini R, Hadamitzky M, Walter H, Zitzmann-Roth EM, Richardt G, Alt E, Schmitt C, Ulm K. A randomized comparison of antiplatelet and anticoagulant therapy after the placement of coronary-artery stents. N Engl J Med. 1996 Apr 25;334(17):1084-9. doi: 10.1056/NEJM199604253341702.

    PubMed 8598866

  • Bertrand ME, Rupprecht HJ, Urban P, Gershlick AH; CLASSICS Investigators. Double-blind study of the safety of clopidogrel with and without a loading dose in combination with aspirin compared with ticlopidine in combination with aspirin after coronary stenting : the clopidogrel aspirin stent international cooperative study (CLASSICS). Circulation. 2000 Aug 8;102(6):624-9. doi: 10.1161/01.cir.102.6.624.

    PubMed 10931801

  • Thebault JJ, Kieffer G, Cariou R. Single-dose pharmacodynamics of clopidogrel. Semin Thromb Hemost. 1999;25 Suppl 2:3-8.

    PubMed 10440415

  • Gawaz M, Seyfarth M, Muller I, Rudiger S, Pogatsa-Murray G, Wolf B, Schomig A. Comparison of effects of clopidogrel versus ticlopidine on platelet function in patients undergoing coronary stent placement. Am J Cardiol. 2001 Feb 1;87(3):332-6, A9. doi: 10.1016/s0002-9149(00)01369-2.

    PubMed 11165971

  • Steinhubl SR, Berger PB, Mann JT 3rd, Fry ET, DeLago A, Wilmer C, Topol EJ; CREDO Investigators. Clopidogrel for the Reduction of Events During Observation. Early and sustained dual oral antiplatelet therapy following percutaneous coronary intervention: a randomized controlled trial. JAMA. 2002 Nov 20;288(19):2411-20. doi: 10.1001/jama.288.19.2411.

    PubMed 12435254

  • Chan AW, Moliterno DJ, Berger PB, Stone GW, DiBattiste PM, Yakubov SL, Sapp SK, Wolski K, Bhatt DL, Topol EJ; TARGET Investigators. Triple antiplatelet therapy during percutaneous coronary intervention is associated with improved outcomes including one-year survival: results from the Do Tirofiban and ReoProGive Similar Efficacy Outcome Trial (TARGET). J Am Coll Cardiol. 2003 Oct 1;42(7):1188-95. doi: 10.1016/s0735-1097(03)00944-6.

    PubMed 14522478

  • Assali AR, Salloum J, Sdringola S, Moustapha A, Ghani M, Hale S, Schroth G, Fujise K, Anderson HV, Smalling RW, Rosales OR. Effects of clopidogrel pretreatment before percutaneous coronary intervention in patients treated with glycoprotein IIb/IIIa inhibitors (abciximab or tirofiban). Am J Cardiol. 2001 Oct 15;88(8):884-6, A6. doi: 10.1016/s0002-9149(01)01897-5. No abstract available.

    PubMed 11676953

  • Smith SC Jr, Feldman TE, Hirshfeld JW Jr, Jacobs AK, Kern MJ, King SB 3rd, Morrison DA, O'Neil WW, Schaff HV, Whitlow PL, Williams DO, Antman EM, Adams CD, Anderson JL, Faxon DP, Fuster V, Halperin JL, Hiratzka LF, Hunt SA, Nishimura R, Ornato JP, Page RL, Riegel B; American College of Cardiology/American Heart Association Task Force on Practice Guidelines; ACC/AHA/SCAI Writing Committee to Update 2001 Guidelines for Percutaneous Coronary Intervention. ACC/AHA/SCAI 2005 guideline update for percutaneous coronary intervention: a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines (ACC/AHA/SCAI Writing Committee to Update 2001 Guidelines for Percutaneous Coronary Intervention). Circulation. 2006 Feb 21;113(7):e166-286. doi: 10.1161/CIRCULATIONAHA.106.173220. No abstract available.

    PubMed 16490830

  • Montalescot G, Sideris G, Meuleman C, Bal-dit-Sollier C, Lellouche N, Steg PG, Slama M, Milleron O, Collet JP, Henry P, Beygui F, Drouet L; ALBION Trial Investigators. A randomized comparison of high clopidogrel loading doses in patients with non-ST-segment elevation acute coronary syndromes: the ALBION (Assessment of the Best Loading Dose of Clopidogrel to Blunt Platelet Activation, Inflammation and Ongoing Necrosis) trial. J Am Coll Cardiol. 2006 Sep 5;48(5):931-8. doi: 10.1016/j.jacc.2006.04.090. Epub 2006 Aug 17.

    PubMed 16949482

  • Price MJ, Coleman JL, Steinhubl SR, Wong GB, Cannon CP, Teirstein PS. Onset and offset of platelet inhibition after high-dose clopidogrel loading and standard daily therapy measured by a point-of-care assay in healthy volunteers. Am J Cardiol. 2006 Sep 1;98(5):681-4. doi: 10.1016/j.amjcard.2006.03.054. Epub 2006 Jul 7.

    PubMed 16923461

  • von Beckerath N, Taubert D, Pogatsa-Murray G, Schomig E, Kastrati A, Schomig A. Absorption, metabolization, and antiplatelet effects of 300-, 600-, and 900-mg loading doses of clopidogrel: results of the ISAR-CHOICE (Intracoronary Stenting and Antithrombotic Regimen: Choose Between 3 High Oral Doses for Immediate Clopidogrel Effect) Trial. Circulation. 2005 Nov 8;112(19):2946-50. doi: 10.1161/CIRCULATIONAHA.105.559088. Epub 2005 Oct 31.

    PubMed 16260639

  • Kastrati A, Mehilli J, Schuhlen H, Dirschinger J, Dotzer F, ten Berg JM, Neumann FJ, Bollwein H, Volmer C, Gawaz M, Berger PB, Schomig A; Intracoronary Stenting and Antithrombotic Regimen-Rapid Early Action for Coronary Treatment Study Investigators. A clinical trial of abciximab in elective percutaneous coronary intervention after pretreatment with clopidogrel. N Engl J Med. 2004 Jan 15;350(3):232-8. doi: 10.1056/NEJMoa031859.

    PubMed 14724302

  • Mehilli J, Kastrati A, Schuhlen H, Dibra A, Dotzer F, von Beckerath N, Bollwein H, Pache J, Dirschinger J, Berger PP, Schomig A; Intracoronary Stenting and Antithrombotic Regimen: Is Abciximab a Superior Way to Eliminate Elevated Thrombotic Risk in Diabetics (ISAR-SWEET) Study Investigators. Randomized clinical trial of abciximab in diabetic patients undergoing elective percutaneous coronary interventions after treatment with a high loading dose of clopidogrel. Circulation. 2004 Dec 14;110(24):3627-35. doi: 10.1161/01.CIR.0000148956.93631.4D. Epub 2004 Nov 7.

    PubMed 15531766

  • Hausleiter J, Kastrati A, Mehilli J, Schuhlen H, Pache J, Dotzer F, Glatthor C, Siebert S, Dirschinger J, Schomig A; ISAR-SMART-2 Investigators. A randomized trial comparing phosphorylcholine-coated stenting with balloon angioplasty as well as abciximab with placebo for restenosis reduction in small coronary arteries. J Intern Med. 2004 Nov;256(5):388-97. doi: 10.1111/j.1365-2796.2004.01398.x.

    PubMed 15485474

  • Kastrati A, Mehilli J, Neumann FJ, Dotzer F, ten Berg J, Bollwein H, Graf I, Ibrahim M, Pache J, Seyfarth M, Schuhlen H, Dirschinger J, Berger PB, Schomig A; Intracoronary Stenting and Antithrombotic: Regimen Rapid Early Action for Coronary Treatment 2 (ISAR-REACT 2) Trial Investigators. Abciximab in patients with acute coronary syndromes undergoing percutaneous coronary intervention after clopidogrel pretreatment: the ISAR-REACT 2 randomized trial. JAMA. 2006 Apr 5;295(13):1531-8. doi: 10.1001/jama.295.13.joc60034. Epub 2006 Mar 13.

    PubMed 16533938

Questions about this trial

What is this clinical trial studying?

A Phase 4 study testing unfractionated heparin in people with Coronary Artery Disease, run by Deutsches Herzzentrum Muenchen at 3 sites in Germany.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 26 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 5 Jan 2012. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 3 sites in Germany. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

The primary outcome measure will be a composite of death, MI, urgent TVR after 30 days or in hospital bleeding (quadruple endpoint, "net clinical benefit"). (time frame: 30 days). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00735280, which also lists 17 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 5 Jan 2012.

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