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Prophylactic IABP in Delayed-Presentation Anterior STEMI (PROACTIVE-AMI)

10 de agosto de 2026 atualizado por: Qilu Hospital of Shandong University

Prophylactic Intra-Aortic Balloon Counterpulsation for Delayed-Presentation Anterior ST-Segment Elevation Myocardial Infarction: A Prospective, Multicenter, Randomized Controlled Trial (PROACTIVE-AMI)

PROACTIVE-AMI is a prospective, multicenter, randomized, open-label trial with blinded endpoint adjudication evaluating whether prophylactic intra-aortic balloon counterpulsation (IABP) initiated before primary percutaneous coronary intervention (PPCI) improves clinical outcomes in patients with delayed-presentation acute anterior ST-segment elevation myocardial infarction (STEMI). Eligible patients are adults aged ≥18 years who present 4 to 12 hours after symptom onset, have electrocardiographic evidence of anterior STEMI with proximal left anterior descending artery total occlusion (TIMI flow 0), and are planned for PPCI. Participants will be randomized 1:1 to pre-PPCI IABP plus standard PPCI or standard PPCI alone. The primary endpoint is 180-day major adverse cardiovascular events (MACE), defined as a composite of all-cause death, cardiogenic shock, and new or worsening heart failure. Secondary outcomes include individual MACE components, cardiac death, length of stay, NT-proBNP, left ventricular ejection fraction, and left ventricular end-diastolic volume. Safety outcomes include major bleeding, vascular complications, thrombocytopenia, and stroke.

Visão geral do estudo

Status

Ainda não está recrutando

Condições

Intervenção / Tratamento

Descrição detalhada

This is a prospective, multicenter, randomized, open-label, parallel-group, controlled clinical trial with blinded endpoint adjudication. The study is designed to evaluate whether prophylactic intra-aortic balloon counterpulsation (IABP) before primary percutaneous coronary intervention (PPCI) can improve outcomes in patients with delayed-presentation acute anterior ST-segment elevation myocardial infarction (STEMI). Eligible patients are adults aged ≥18 years with symptom onset to presentation between 4 and 12 hours, electrocardiographic evidence of anterior STEMI (≥2 mm ST elevation in contiguous anterior leads or sum ≥4 mm), and angiographically confirmed proximal left anterior descending artery occlusion with TIMI flow 0. After informed consent and coronary angiography confirming eligibility, participants are randomized in a 1:1 ratio to one of two groups: (1) prophylactic IABP before infarct-related artery opening plus standard PPCI, or (2) standard PPCI alone. In the intervention group, IABP will be inserted before PCI, operated at a 1:1 counterpulsation ratio for at least 24 hours and up to 72 hours as clinically appropriate. In the control group, prophylactic mechanical circulatory support will not be routinely used; rescue IABP may be initiated if predefined hemodynamic deterioration or complications occur. All participants receive guideline-directed medical therapy for ST-segment elevation myocardial infarction. The primary endpoint is major adverse cardiovascular events (MACE) within 180 days after randomization, defined as a composite of all-cause death, cardiogenic shock, and new or worsening heart failure. Secondary endpoints include individual components of the primary composite endpoint, cardiac death, length of hospital stay, NT-proBNP at 90 and 180 days, left ventricular ejection fraction and left ventricular end-diastolic volume at 90 and 180 days. Safety outcomes include major bleeding (BARC 3-5), vascular complications, thrombocytopenia, and stroke within 30 days. Follow-up assessments will be performed during hospitalization and at 30, 90, and 180 days after randomization. Endpoint adjudication will be performed by an independent clinical events committee blinded to treatment assignment.

Tipo de estudo

Intervencional

Inscrição (Estimado)

504

Estágio

  • Não aplicável

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Contato de estudo

Estude backup de contato

Locais de estudo

  • China
      • Beijing, China, 100037
        • Fuwai Hospital, Chinese Academy of Medical Sciences
        • Contato:
          • Qing Gu, MD, PhD
          • Número de telefone: +86 10 88396009
          • E-mail: guqingfw@126.com
    • Shandong
      • Jinan, Shandong, China, 250012
        • Qilu Hospital of Shandong University, Jinan, Shandong, China
        • Contato:
          • Yuguo Chen, MD
        • Contato:
          • Chuanbao Li, MD
          • Número de telefone: +86 18560083097
          • E-mail: bao2460@126.com
      • Jining, Shandong, China, 272011
        • Jining No.1 People's Hospital
        • Contato:
      • Qingdao, Shandong, China, 266003
        • The Affiliated Hospital of Qingdao University
        • Contato:

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

  • Adulto
  • Adulto mais velho

Aceita Voluntários Saudáveis

Não

Descrição

Inclusion Criteria:

  1. Age ≥ 18 years.
  2. First electrocardiogram on arrival shows ST-segment elevation ≥ 2 mm in at least two contiguous anterior leads, or sum of ST-segment elevation ≥ 4 mm in anterior leads.
  3. Ischemic symptoms (chest pain, chest tightness, upper abdominal discomfort, left shoulder radiation, etc.) onset to hospital arrival between ≥ 4 hours and ≤ 12 hours, and planned for primary PCI.
  4. Coronary angiography confirms the infarct-related artery is the proximal left anterior descending (LAD) (before the first septal branch or first diagonal branch) with TIMI flow grade 0 (total occlusion).
  5. Patient or legal representative provides written informed consent.

Exclusion Criteria:

  1. Established cardiogenic shock (systolic blood pressure < 90 mmHg without inotropes/vasopressors, or requiring vasopressors to maintain systolic blood pressure ≥ 90 mmHg, AND blood lactate > 2.0 mmol/L).
  2. Severe heart failure: Killip class ≥ III, or requiring non-invasive/invasive positive pressure ventilation before enrollment.
  3. Malignant arrhythmias, including cardiac arrest, ventricular fibrillation, ventricular flutter, pulseless ventricular tachycardia, or high-grade atrioventricular block.
  4. Severe mechanical complications (e.g., free wall rupture, ventricular septal defect, acute severe mitral regurgitation).
  5. Contraindications to IABP (severe peripheral vascular disease, aortic dissection, known aortic aneurysm, moderate-to-severe aortic regurgitation).
  6. Prior myocardial infarction or known chronic heart failure (left ventricular ejection fraction < 50%).
  7. Prior coronary artery bypass grafting (CABG).
  8. Stroke within 1 month, or history of hemorrhagic stroke at any time.
  9. Active gastrointestinal bleeding within 3 months, or gastrointestinal diseases with increased bleeding risk.
  10. Received thrombolytic therapy for this episode.
  11. Initiation of any mechanical circulatory support (IABP, Impella, ECMO) before coronary angiography.
  12. Severe hepatic insufficiency (Child-Pugh C, or ALT >5×ULN with total bilirubin >3×ULN), renal insufficiency (eGFR < 15 mL/min/1.73 m² or chronic dialysis), or end-stage disease with life expectancy < 1 year.
  13. Pregnancy or lactation.
  14. Currently participating in another interventional trial.

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

  • Finalidade Principal: Tratamento
  • Alocação: Randomizado
  • Modelo Intervencional: Atribuição Paralela
  • Mascaramento: Nenhum (rótulo aberto)

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: Prophylactic IABP + PPCI
Participants randomized to this arm will receive prophylactic intra-aortic balloon pump counterpulsation before primary percutaneous coronary intervention (PPCI), followed by standard PPCI and guideline-directed medical therapy.
Dispositivo: Intra-Aortic Balloon Pump
Intra-aortic balloon counterpulsation initiated before opening the infarct-related artery and maintained according to protocol.
Procedimento: Primary Percutaneous Coronary Intervention
Standard primary percutaneous coronary intervention for infarct-related artery reperfusion.
Comparador Ativo: Standard PPCI Alone
Participants randomized to this arm will receive standard PPCI and guideline-directed medical therapy without routine prophylactic IABP. Rescue IABP may be used only if clinically indicated according to protocol.
Procedimento: Primary Percutaneous Coronary Intervention
Standard primary percutaneous coronary intervention for infarct-related artery reperfusion.

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
180-day Major Adverse Cardiovascular Events (MACE)
Prazo: 180 days
Composite of all-cause death, cardiogenic shock and heart failure assessed at 180 days.
180 days

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
All-cause Death
Prazo: 180 days
Death from any cause assessed at 180 days.
180 days
Cardiogenic Shock
Prazo: 180 days
Cardiogenic shock defined as systolic blood pressure <90 mmHg without vasoactive support or requiring vasoactive agents to maintain blood pressure, together with blood lactate >2.0 mmol/L, assessed at 180 days.
180 days
Heart Failure
Prazo: 180 days
New-onset or worsening heart failure during hospitalization or rehospitalization after discharge for heart failure, assessed at 180 days.
180 days
Cardiac Death
Prazo: 180 days
Death due to cardiovascular causes assessed at 180 days.
180 days
Length of Hospital Stay
Prazo: from admission to discharge
Number of days from admission to discharge.
from admission to discharge
NT-proBNP
Prazo: 90 days
Plasma NT-proBNP level at 90 days.
90 days
NT-proBNP
Prazo: 180 days
Plasma NT-proBNP level at 180 days.
180 days
Left Ventricular Ejection Fraction (LVEF)
Prazo: 90 days
Left ventricular ejection fraction assessed by echocardiography or other protocol-specified imaging modality at 90 days.
90 days
Left Ventricular Ejection Fraction (LVEF)
Prazo: 180 days
Left ventricular ejection fraction assessed by echocardiography or other protocol-specified imaging modality at 180 days.
180 days
Left Ventricular End-Diastolic Volume (LVEDV)
Prazo: 90 days
Left ventricular end-diastolic volume assessed by echocardiography or other protocol-specified imaging modality at 90 days.
90 days
Left Ventricular End-Diastolic Volume (LVEDV)
Prazo: 180 days
Left ventricular end-diastolic volume assessed by echocardiography or other protocol-specified imaging modality at 180 days.
180 days

Outras medidas de resultado

Medida de resultado
Descrição da medida
Prazo
Major Bleeding
Prazo: 30 days
Safety Outcome Measures: Bleeding events classified as BARC 3-5, assessed at 30 days.
30 days
Vascular Complications
Prazo: 30 days
Safety Outcome Measures: Severe vascular complications requiring surgical or endovascular repair, including limb ischemia, pseudoaneurysm, or arterial dissection, assessed at 30 days.
30 days
Thrombocytopenia
Prazo: 30 days
Safety Outcome Measures: Platelet count <100 × 10^9/L or a decrease of >50% from baseline, assessed at 30 days.
30 days
Stroke
Prazo: 30 days
Safety Outcome Measures: Ischemic or hemorrhagic stroke adjudicated by the Clinical Events Committee, assessed at 30 days.
30 days

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Patrocinador

Qilu Hospital of Shandong University

Investigadores

  • Cadeira de estudo: Yuguo Chen, Qilu Hospital of Shandong University

Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo (Estimado)

1 de agosto de 2026

Conclusão Primária (Estimado)

31 de janeiro de 2028

Conclusão do estudo (Estimado)

31 de julho de 2028

Datas de inscrição no estudo

Enviado pela primeira vez

1 de agosto de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

10 de agosto de 2026

Primeira postagem (Real)

12 de agosto de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

12 de agosto de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

10 de agosto de 2026

Última verificação

1 de agosto de 2026

Mais Informações

Termos relacionados a este estudo

Palavras-chave

Termos MeSH relevantes adicionais

Outros números de identificação do estudo

  • KYLL-2026-04-009-2

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

NÃO

Descrição do plano IPD

Individual participant data (IPD) will not be shared because the study team does not currently have a data sharing plan or repository in place. De-identified participant-level data may be available from the corresponding author upon reasonable request and subject to institutional approval.

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Não

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Não

Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .

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