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Lessons from the TA TASTE STE trial Prospective Registry based Randomized Clinical Trials (RRCT) a new concept for clinical research Stefan James, Uppsala University Ole Frbert, rebro University, Gran Olivecrona, Lund University,

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  1. Lessons from the TA TASTE STE trial Prospective Registry based Randomized Clinical Trials (RRCT) – a new concept for clinical research Stefan James, Uppsala University Ole Fröbert, Örebro University, Göran Olivecrona, Lund University, David Erlinge, Lund University, Tomas Jernberg, Karolinska Institute, Stockholm, Bertil Lindahl, Uppsala University, Lars Wallenting, Uppsala University, Bo Lagerqvist, Uppsala University Sweden SWEDE HEART

  2. Randomized Clinical Trials- RCT Strengths  Correctly designed studies with adequate power are gold standard  Extinguishes confounding Weaknesses  Expensive  Highly selected populations due to exclusion criteria  Often selected specialized study centers  Often surrogate endpoints  Long time to plan and complete  Often sponsored by industry- only studies with economic interest will be performed SWEDE HEART

  3. Thrombus aspiration in Sweden ESC guidelines SWEDE HEART

  4. / Swedish registry data TAPAS TA+PCI (N=3 666) PCI alone (N=16 417) HR (95% CI): 1.21 (1.08-1.35 ) Vlaar, P.J. et al. The Lancet 2008; 371:1915-20 Fröbert, O. et al. Int J Cardiol. 2010; 145:572-3

  5. Number of cases annually: 80 000 RIKS-HIA 73 CCU hospitals, 100% SCAAR 30 PCI hospitals, 100% Percutaneous valves 7 hospitals, 100% Heart surgery 7 hospitals, 100% Secondary prevention 65 hospitals, 85% >150 variables (Baseline data, procedural and outcome measures) At monitoring: 95-96% agreement between files and registry.

  6. Registry based Randomized Trial SWEDE HEART Personal data Data entry on line by the operator Automatic linkage with population registry Clinical background and prior CV disease Automated data checks Angiographic background data

  7. Two questions need to be answered: Did the patient consent orally? Are inclusion and no exclusion criteria met? Did the patient consent? Are inclusion and exclusion crieteria met?

  8. Information for consent Did the patient consent? Are inclusion and exclusion crieteria met?

  9. TA TAST STE inclusion rate Patients All primary PCI:s Randomized 7244 patients Date

  10. TE trial enrollment flow chart TASTE Enrolled in Denmark All patients with STEMI in Sweden and Iceland undergoing primary or rescue PCI. N=11 709 * ) N=247 Enrolled in TASTE TE Not enrolled N=7259 N=4697 Erroneous enrollments N=15 Randomized in TASTE TE N=7244 N=3621 assigned N=3623 assigned to thrombus aspiration to conventional PCI N=3399 underwent N=3445 underwent N=1162 underwent N=3535 underwent thrombus aspiration conventional PCI thrombus aspiration conventional PCI N=222 underwent N=178 underwent conventional PCI thrombus aspiration N=3621 were N=3623 were N=1162 were N=3535 were followed up followed up followed up followed up

  11. Ongoing and planned R-RCTs DETOX-AMI DET ermination of the role of OX ygen in A cute M yocardial I nfarction, N=7000 VALIDATE Bivalirudin versus Heparin in NST and ST- Elevation myocardial infarction in patients on modern antiplatelet therapy in SWEDEHEART, N=6000 SWEDEPAD SWEdish Drug Elution trial in Peripheral Arterial Disease N=2500 Prospect II-Absorb To test if the progress of non-flow obstructing lesions with a plaque burden >70% is reduced by treatment with Absorb™ Bioresorbable Vascular Scaffold (BVS) as compared to optimal medical therapy (OMT) N=300

  12. R-RCT vs. classical RCT  New concept for clinical research  Combines the advantages of a clinical registry and randomized study  Complement to classical RCT – No substitute RRCT RCT Approval of new Evaluation of therapeutic pharmaceutical agents and options available/used in medical devices routine clinical care

  13. RRCT Registry based Randomized Clinical Trials - Challenges - Design – simple, one main hypothesis - Variable definitions - Randomization on-line - Data completeness - Data validity - Monitoring- limited - Primary outcome variable- defined and available - Adjudication – selected outcome variables - Work load for regular clinical staff

  14. Conclusions • Large need for randomized trials (RCT) particularly for the evaluation of strategies, devices, pharmacological therapies • Classical RCTs are often not performed in broad representative patient populations • National clinical registries have representative patient populations and networks for collaboration • Prospective Registry based Randomized Clinical Trials (RRCT) is a new opportunity for clinical research • RRCT is ideal for one clinically important hypothesis with reliable hard endpoints

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