Effects of Pressure-controlled Intermittent Coronary Sinus Occlusion (PiCSO) Therapy on miRNAs Expression and Absolute Microvascular Resistance by Continuous Thermodilution in ST-segment Elevation Myocardial Infarction (STEMI) Patients: PiCSO-STEMI TRIAL (PiCSO-STEMI)

In this study we pretend to determine the molecular (miRNAs expression, angiogenic and inflammatory biomarkers) and microcirculatory (assessed by the innovative continuous intracoronary thermodilution technique) effects of PiCSO compared to a standard PCI control group in patients with high-risk anterior STEMI. Then, we aim to assess the efficacy of these molecular biomarkers as prognostic tools. Also, we will evaluate the impact of PiCSO on the coronary microcirculation beyond the acute phase in the follow-up six months after STEMI. Finally, we will assess PiCSO influence on Heart Failure (HF) clinical variables and patients' quality of life including a cost-effectiveness assessment in the mid-term follow-up one year after the STEMI event.

Study Overview

• Status: Withdrawn
• Conditions: Anterior Myocardial Infarction
• Intervention / Treatment: Device: PiCSO Impulse System; Procedure: Percutaneous Coronary Intervention (PCI)

• Study Type: Interventional
• Phase: Not Applicable

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Age ≥ 18 years old.
2. Anterior STEMI (ECG with persistent elevation ≥ 2 mm (0.2 mV) in 2 or more contiguous anterior precordial leads (V2, V3, V4) in men or ≥ 1.5 mm (0.15 mV) in women.
3. Culprit lesion in proximal or mid Left Anterior Descending Artery (LAD).
4. Pre-PCI TIMI flow 0-1.
5. Symptoms consistent with myocardial ischemia (persistent chest pain, dyspnea, nauseas/vomiting, fatigue, palpitations or syncope) present for ≤ 12 hours.
6. The patient is eligible for primary PCI.
7. Informed consent received and signed for study enrollment.

Exclusion Criteria:

1. Contraindication to coronary angiogram or PCI.
2. Implants or foreign bodies in the coronary sinus.
3. Known allergies to polyurethanes, Polyethylene Terephthalate (PET) or stainless steel.
4. Known pregnancy or breastfeeding.
5. Known coagulopathy.
6. Known severe kidney disease (eGFR <=30 mL/min/1.73) and/or hemodialysis.
7. Known large pericardial effusion or cardiac tamponade.
8. Central hemodynamically relevant left-right shunt.
9. Previous MI or Coronary Artery Bypass Graft (CABG).
10. Previous history of stroke, transient ischemic attack (TIA) or reversible ischemic neurological deficit within last 6 months.
11. Cardiopulmonary resuscitated (CPR) cardiac arrest ≥ 5 minutes whom baseline neurologic status is not present.
12. Unconscious at presentation.
13. Need for circulatory support.
14. Need for invasive mechanical ventilation.
15. Need for temporal intravenous pacemaker.
16. Patient not suitable for femoral access.
17. Known contraindication for adenosine administration (severe asthma, complicated Atrioventricular (AV) block, critical aortic stenosis, severe cardiac arrhythmias, severe valve diseases).
18. Known epicardial stenosis greater than 50% distal to the culprit LAD lesion.
19. Active participation in another drug or device investigational trial.
20. Medical, social or psychological condition that limits the ability of patient to participate in the study.
21. Patients with definite or probable coronavirus disease 19 diagnosis within 2 weeks prior to STEMI.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Single

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: PICSO+PCI	Device: PiCSO Impulse System; The PiCSO Impulse System is intended to reduce infarct size by intermittently occluding the coronary sinus outflow in patients undergoing a percutaneous coronary interventional procedure for myocardial infarction and presenting with Thrombolysis in myocardial infarction (TIMI) flow of 0 or 1.; Procedure: Percutaneous Coronary Intervention (PCI); Minimally invasive procedures used to open clogged coronary arteries
Active Comparator: Standard PCI	Procedure: Percutaneous Coronary Intervention (PCI); Minimally invasive procedures used to open clogged coronary arteries

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Superiority of PiCSO in reducing microvascular dysfunction	To determine the superiority of PiCSO in reducing the microvascular dysfunction (defined as microvascular resistance >500 WU) as compared to standard of care	After primary PCI at time 0 after intervention

Collaborators and Investigators

• Sponsor: Fundacio Privada Mon Clinic Barcelona
• Collaborators: Miracor Medical SA

Study record dates

Study Major Dates

• Study Start (Actual): November 14, 2022
• Primary Completion (Actual): June 21, 2024
• Study Completion (Actual): June 21, 2024

Study Registration Dates

• First Submitted: November 30, 2022
• First Submitted That Met QC Criteria: November 30, 2022
• First Posted (Actual): December 9, 2022

Study Record Updates

• Last Update Posted (Actual): August 14, 2025
• Last Update Submitted That Met QC Criteria: August 11, 2025
• Last Verified: August 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Vascular Diseases; Cardiovascular Diseases; Pathologic Processes; Heart Diseases; Necrosis; Myocardial Ischemia; Ischemia; ST Elevation Myocardial Infarction; Myocardial Infarction; Infarction; Anterior Wall Myocardial Infarction
• Other Study ID Numbers: PiCSO-STEMI

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No