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

2026年8月10日 更新者：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.

調査の概要

状態

まだ募集していません

条件

介入・治療

詳細な説明

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.

研究の種類

介入

入学 (推定)

504

段階

  • 適用できない

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究連絡先

研究連絡先のバックアップ

研究場所

  • 中国
      • Beijing、中国、100037
        • Fuwai Hospital, Chinese Academy of Medical Sciences
        • コンタクト：
    • Shandong
      • Jinan、Shandong、中国、250012
        • Qilu Hospital of Shandong University, Jinan, Shandong, China
        • コンタクト：
          • Yuguo Chen, MD
        • コンタクト：
          • Chuanbao Li, MD
          • 電話番号：+86 18560083097
          • メール：bao2460@126.com
      • Jining、Shandong、中国、272011
        • Jining No.1 People's Hospital
        • コンタクト：
      • Qingdao、Shandong、中国、266003
        • The Affiliated Hospital of Qingdao University
        • コンタクト：

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

  • 大人
  • 高齢者

健康ボランティアの受け入れ

いいえ

説明

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.

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか？

デザインの詳細

  • 主な目的：処理
  • 割り当て：ランダム化
  • 介入モデル：並列代入
  • マスキング：なし（オープンラベル）

武器と介入

参加者グループ / アーム
介入・治療
実験的：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.
デバイス：Intra-Aortic Balloon Pump
Intra-aortic balloon counterpulsation initiated before opening the infarct-related artery and maintained according to protocol.
手順：Primary Percutaneous Coronary Intervention
Standard primary percutaneous coronary intervention for infarct-related artery reperfusion.
アクティブコンパレータ：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.
手順：Primary Percutaneous Coronary Intervention
Standard primary percutaneous coronary intervention for infarct-related artery reperfusion.

この研究は何を測定していますか？

主要な結果の測定

結果測定
メジャーの説明
時間枠
180-day Major Adverse Cardiovascular Events (MACE)
時間枠：180 days
Composite of all-cause death, cardiogenic shock and heart failure assessed at 180 days.
180 days

二次結果の測定

結果測定
メジャーの説明
時間枠
All-cause Death
時間枠：180 days
Death from any cause assessed at 180 days.
180 days
Cardiogenic Shock
時間枠：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
時間枠：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
時間枠：180 days
Death due to cardiovascular causes assessed at 180 days.
180 days
Length of Hospital Stay
時間枠：from admission to discharge
Number of days from admission to discharge.
from admission to discharge
NT-proBNP
時間枠：90 days
Plasma NT-proBNP level at 90 days.
90 days
NT-proBNP
時間枠：180 days
Plasma NT-proBNP level at 180 days.
180 days
Left Ventricular Ejection Fraction (LVEF)
時間枠：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)
時間枠：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)
時間枠：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)
時間枠：180 days
Left ventricular end-diastolic volume assessed by echocardiography or other protocol-specified imaging modality at 180 days.
180 days

その他の成果指標

結果測定
メジャーの説明
時間枠
Major Bleeding
時間枠：30 days
Safety Outcome Measures: Bleeding events classified as BARC 3-5, assessed at 30 days.
30 days
Vascular Complications
時間枠：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
時間枠：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
時間枠：30 days
Safety Outcome Measures: Ischemic or hemorrhagic stroke adjudicated by the Clinical Events Committee, assessed at 30 days.
30 days

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

スポンサー

Qilu Hospital of Shandong University

捜査官

  • スタディチェア：Yuguo Chen、Qilu Hospital of Shandong University

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (推定)

2026年8月1日

一次修了 (推定)

2028年1月31日

研究の完了 (推定)

2028年7月31日

試験登録日

最初に提出

2026年8月1日

QC基準を満たした最初の提出物

2026年8月10日

最初の投稿 (実際)

2026年8月12日

学習記録の更新

投稿された最後の更新 (実際)

2026年8月12日

QC基準を満たした最後の更新が送信されました

2026年8月10日

最終確認日

2026年8月1日

詳しくは

本研究に関する用語

キーワード

追加の関連 MeSH 用語

その他の研究ID番号

  • KYLL-2026-04-009-2

個々の参加者データ (IPD) の計画

個々の参加者データ (IPD) を共有する予定はありますか?

いいえ

IPD プランの説明

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.

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