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- Essai clinique NCT00922675
Postconditioning in ST-elevation Myocardial Infarction (POSTEMI)
Postconditioning in ST-elevation Myocardial Infarction Treated With Primary PCI
Study objectives: To assess the effects of postconditioning on infarct size in patients with ST-elevation infarction referred to PCI.
Study design: Prospective, randomized, open-label study with blinded endpoint evaluation. Included patients will be randomly allocated to postconditioning or control. Patients with symptoms of acute myocardial infarction of less than 6 hours duration fulfilling ECG criteria for primary PCI are eligible. PCI follow established routines. In postconditioning patients, additional, short (1 min), intermittent balloon occlusions will be applied after initial opening of infarct related artery. After this intervention, PCI proceeds routinely with stent implantation. In the control group, stent implantation after initial opening proceeds as usual. Primary endpoint is final infarct size, determined by MRI after 4 months. 260 patients will be included. Follow-up is 1 year. Inclusion period: 18 - 24 months.
Clinical implications: Reperfusion therapy, administered as early as possible after start of symptoms, has improved the prognosis in acute ST-elevation myocardial infarction. Still, however, many patients suffer large infarctions, subsequently with an increased risk of heart failure, arrhythmias, and death. In pilot studies, mechanical postconditioning has been shown to reduce infarct size and thus potentially improve prognosis. However, the effect of postconditioning must be confirmed in larger clinical trials before implemented in routine treatment.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Type d'étude
Inscription (Réel)
Phase
- N'est pas applicable
Contacts et emplacements
Lieux d'étude
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Oslo, Norvège, N-0407
- Dept. of Cardiology, Oslo Univ. Hosp. Ulleval
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- acute symptoms consistent with an acute myocardial infarction of less than 6 hours duration
- an occluded infarct related artery must be demonstrated (TIMI-flow 0-1)
Exclusion Criteria:
- Prior myocardial infarction
- Demonstration of collaterals to the infarcted area
- TIMI-flow >1 before intervention or TIMI-flow <2 after initial balloon inflation
- Demonstration of a distal occlusion
- Patients given thrombolytic treatment
- Patients in cardiogenic shock
- Any contraindication to MRI (magnetic resonance imaging)
- Unwillingness to participate
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Seul
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
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Expérimental: Postconditioning
Active arm:Postconditioning protocol before routine PCI/stenting of an occluded coronary artery
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After opening of IRA and establishment of TIMI-flow grade 2 or 3, the control group continues the procedure with stenting.
In the postconditioning group 4 additional balloon inflations separated by 1 minute reperfusion are given, starting after 1 minute of reperfusion.
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Autre: Control
Control arm: Routine PCI/stenting of an occluded coronary artery without postconditioning
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After opening of IRA and establishment of TIMI-flow grade 2 or 3, the control group continues the procedure with stenting.
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Délai |
|---|---|
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Infarct size, assessed by MRI
Délai: 4 months
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4 months
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Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Myocardial blushing grade
Délai: assessed at the end of PCI procedure
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assessed at the end of PCI procedure
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ST-resolution in ECG
Délai: Assessed after 1 hour
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Assessed after 1 hour
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Troponin-T and CK-MB
Délai: peak release values
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peak release values
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Echocardiographic evaluation of left ventricular function including speckle-tracking measurement.
Délai: assessed at baseline, 4 months and1 year
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Assesment of LV function.
Comparison with CMR in the whole study population and between treatment groups.
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assessed at baseline, 4 months and1 year
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Incidence of treated arrhythmias and heart failure during initial hospitalization Incidence of death, non-fatal myocardial infarction, unstable angina, heart failure, and cerebrovascular disease
Délai: 1-year follow up.
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1-year follow up.
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Myocardial salvage
Délai: Baseline to 4 months
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Myocardial salvage defined as (area at risk-final infarct size)/area at risk.
Area at risk measured by CMR at baseline and final infarct size by CMR at 4 months.
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Baseline to 4 months
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Collaborateurs et enquêteurs
Parrainer
Les enquêteurs
- Chaise d'étude: Jan Eritsland, MD, PhD, Oslo Univ.Hosp. Ulleval
Publications et liens utiles
Publications générales
- Tollefsen IM, Shetelig C, Seljeflot I, Eritsland J, Hoffmann P, Andersen GO. High levels of interleukin-6 are associated with final infarct size and adverse clinical events in patients with STEMI. Open Heart. 2021 Dec;8(2):e001869. doi: 10.1136/openhrt-2021-001869.
- Limalanathan S, Andersen GO, Klow NE, Abdelnoor M, Hoffmann P, Eritsland J. Effect of ischemic postconditioning on infarct size in patients with ST-elevation myocardial infarction treated by primary PCI results of the POSTEMI (POstconditioning in ST-Elevation Myocardial Infarction) randomized trial. J Am Heart Assoc. 2014 Apr 23;3(2):e000679. doi: 10.1161/JAHA.113.000679.
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Estimation)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- Po 1506
Plan pour les données individuelles des participants (IPD)
Prévoyez-vous de partager les données individuelles des participants (DPI) ?
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