CRP Apheresis in STEMI

Not Applicable

Recruiting

• Conditions: ST Elevation Myocardial Infarction; C-Reactive Protein; Myocardial Injury; Apheresis
• Interventions: Device: Selective CRP apheresis using the PentraSorb®-CRP system

• Registration Number: NCT04939805
• Lead Sponsor: Medical University Innsbruck

Brief Summary

Background: In patients with acute ST-elevation myocardial infarction (STEMI), the amount of infarcted myocardium (infarct size) is known to be a major predictor for adverse remodeling and recurrent adverse cardiovascular events. Effective cardio-protective strategies with the aim of reducing infarct size are therefore of great interest. Local and systemic inflammation influences the fate of ischemic myocardium and thus, adverse remodeling and clinical outcome. C-reactive protein (CRP) also acts as a potential mechanistic mediator that adversely affects the amount of irreversible myocardial tissue damage after acute myocardial infarction.

Objective: The main objectives of the current study are to investigate the efficacy of selective CRP apheresis, using the PentraSorb®-CRP system, as an adjunctive therapy to standard of care for patients with acute STEMI treated with primary PCI.

Design: Investigator-initiated, prospective, randomized, open-label (outcome assessors masked), controlled, multicenter, two group trial with a two-stage adaptive design.

Innovation: Selective CRP apheresis offers potential to decrease infarct size and consequently improve outcome after PCI for STEMI. This is the first randomized trial investigating the impact of selective CRP apheresis on infarct size in post-STEMI patients. In perspective, the study design allows furthermore to collect robust evidence for the design of a definitive outcome study.

Detailed Description

Not available

Study Timeline

• Study Start: 2021-04-01
• Study First Submitted: 2021-06-07
• Study First Submitted QC: 2021-06-17
• Study First Posted: 2021-06-25
• Status Verified: 2025-04
• Last Update Submitted: 2025-05-06
• Last Update Posted: 2025-05-09
• Primary Completion: 2025-08-31
• Study Completion: 2025-08-31

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 202

Inclusion Criteria

1. Diagnosis of first acute STEMI in accordance with the European Society of Cardiology (ESC) Guidelines for the management of acute myocardial infarction in patients presenting with ST-segment elevation
2. Symptoms consistent with STEMI with beginning greater than 30 minutes but less than 12 hours prior to primary percutaneous coronary intervention (PCI)
3. CRP elevation of ≥7 mg/l measured between 6 to 16 hours after primary PCI
4. Eligible for primary PCI
5. Age ≥18 years
6. Written informed consent

Exclusion Criteria

1. Prior acute myocardial infarction, coronary artery bypass surgery or PCI.
2. Persistent hemodynamic instability (Killip class >2 including cardiogenic shock) or resuscitated cardiac arrest not allowing a CMR scan.
3. The patient is febrile (temperature >38°C) or has experienced an acute infection with fever in the last 14 days.
4. CRP >15 mg/l at time of hospital admission.
5. Chronic inflammatory disease.
6. Known history of severe hepatic failure
7. Chronic kidney disease with a creatinine clearance <30ml/min./1.73m²
8. Contraindication to CMR.
9. Pre-STEMI life expectancy of <1 year
10. Participation in another interventional trial
11. Limited possibility to join the follow-up examinations (e.g. patient lives abroad)
12. Pregnancy

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Selective CRP apheresis as an adjunct to standard of care	Selective CRP apheresis using the PentraSorb®-CRP system	Apheresis using the PentraSorb®-CRP system will be performed at day 1, 2 and 3 after PCI.

Primary Outcome Measures

Name	Time	Method
Primary efficacy endpoint	5 ± 2 days post PCI	Infarct size expressed as % of left ventricular myocardial mass (LVMM) as visualized by cardiac magnetic resonance (CMR) imaging at 5 ± 2 days post PCI

Secondary Outcome Measures

Name	Time	Method
Cardiac autonomic function: Periodic repolarization dynamics	5 ± 2 days, 4 months, 12 months post PCI
Cardiac autonomic function: Skin sympathetic nerve activity	5 ± 2 days, 4 months, 12 months post PCI
Biomarker concentrations of hemodynamic stress (N-terminal pro-B-Type Natriuretic Peptide)	at baseline, 4 months, 12 months post PCI
Renal function (Cystatin C-based calculation of creatinine clearance)	during hospitalization for the index event
Cardiac autonomic function: Baroreflex sensitivity	5 ± 2 days, 4 months, 12 months post PCI
Safety endpoint	during hospitalization for the index event	Adverse events according to Common Terminology Criteria for Adverse Events (CTCAE) during hospitalization for the index event
All-cause mortality or hospitalization for heart failure within 12 months after randomization	within 12 months after randomization	All-cause mortality or hospitalization for heart failure within 12 months after randomization (endpoint of interest with respect to the two-stage adaptive design)
Hospitalization for heart failure within 12 months after randomization	within 12 months after randomization
Cardiovascular mortality at 12 months	within 12 months after randomization
CRP concentrations	during hospitalization for the index event	CRP concentrations during index hospitalization
Cardiac autonomic function: Deceleration capacity of heart rate	5 ± 2 days, 4 months, 12 months post PCI
CMR endpoints defined as: Left ventricular ejection fraction and microvascular obstruction and exploratory (intramyocardial hemorrhage, edema extent, myocardial salvage, native T1 mapping, strain)	at baseline, 4 months and 12 months after PCI for STEMI	CMR endpoints will be assessed at baseline, 4 and 12 months CMR follow-up study and are defined according to the Journal of American College of Cardiology Scientific Expert Consensus document.
Left ventricular thrombus formation	5 ± 2 days, 4 months, 12 months post PCI
Biomarker concentrations of myocardial necrosis (enzymatic infarct size; high-sensitivity troponin T)	at baseline, 4 months, 12 months post PCI
Cardiac autonomic function: Heart rate variability	5 ± 2 days, 4 months, 12 months post PCI
Renal function (eGFR)	during hospitalization for the index event	as measured by the MDRD and CKD-EPI formula

Trial Locations

Locations (5)

Medical Clinic II - University Heart Center Lübeck; 🇩🇪 Lübeck, Schleswig-Holstein, Germany

University Clinic for Cardiology and Nephrology, Medical University of Graz; 🇦🇹 Graz, Austria

University Clinic of Internal Medicine II, Paracelsus Medical University Salzburg; 🇦🇹 Salzburg, Austria

Leipzig Heart Center; 🇩🇪 Leipzig, Germany

University Clinic of Internal Medicine III, Cardiology and Angiology. University Clinic of Internal Medicine IV, Nephrology and Hypertensiology. University Clinic of Radiology.; 🇦🇹 Innsbruck, Austria