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CompletedNCT03363035H-REPLACEUpdated Feb 22, 2022

Safety and Efficacy of LMWH Versus Rivaroxaban in Chinese Patients Hospitalized With Acute Coronary Syndrome

A Phase 4 interventional study of Rivaroxaban 2.5 mg and Rivaroxaban 5 mg in Acute Coronary Syndrome, Myocardial Infarction and Myocardial Ischemia, sponsored by Second Xiangya Hospital of Central South University. Completed at 24 sites in China. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2022-02-22.

Sponsored by Second Xiangya Hospital of Central South University · Phase 4, Interventional, and Treatment

Phase
Phase 4
Study type
Interventional
Enrollment
2,055
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 13 studies testing rivaroxaban in Acute Coronary Syndrome — 2 open to participants now, 2 under way, none of them phase 3. Rivaroxaban · Acute Coronary Syndrome.

Enrollment
5th of 13
2,055 · median 261
Started
2018
with 1 other
Phase 4
7 of 13
2 open now
Registered
6th of 13
by date

Among the 13 studies testing rivaroxaban in Acute Coronary Syndrome, this one is the 5th largest by enrollment, is one of 2 that started in 2018, is one of 7 in phase 4, and was the 6th registered.

By phase

13 studies; the count open now beside each. This study's row is marked.

Phase 4this study7 · 2 open
Phase 23 · 0 open
Phase 32 · 0 open
No phase1 · 0 open

By the year they started

First in 2006; this study’s year is marked. 2 started in 2018.

Size and results

Median enrollment 261 across the 13 interventional studies. Of the 8 that completed or were terminated, 3 (38%) have results posted.

Watch this landscapeDownload CSVWith an account: a weekly mail of what changed among 13 studies testing rivaroxaban in Acute Coronary Syndrome, or all of them as a file.
02

Study summary

H-REPLACE trial is a prospective, randomized, open-label, active-controlled, multicenter study in participants with ACS (STEMI or NSTEMI, unstable angina). All eligible participants receiving background treatment of aspirin plus clopidogrel or ticagrelor will be randomly assigned to either oral rivaroxaban 2.5 mg twice daily or rivaroxaban 5 mg twice daily or subcutaneous (SC) enoxaparin 1mg/kg twice daily until hospital discharge or 12 hours before revascularization therapy for a maximum of 8 days.

Read the detailed description

Acute coronary syndrome (ACS) is a serious and life threatening condition. Anticoagulation during the acute phase of ACS is effective in reducing ischaemic events. The combination regimen of anticoagulation with dual antiplatelet therapy (DAPT) strategy is more effective than either treatment alone. The most widely used parenteral anticoagulation agent in ACS patients is enoxaparin (1 mg/kg administered subcutaneously twice daily).

Rivaroxaban is a novel oral anticoagulant with potent anti-Xa activity, which might be an attractive alternative drug to enoxaparin. In fact, rivaroxaban was consistently shown to be non-inferior to enoxaparin therapy aimed to reduce the event of recurrent venous thromboembolism. Moreover, the bleeding risk of low dose of rivaroxaban is low and acceptable (1.0-2.5%) during the acute phase of ACS as shown by ATLAS ACS-TIMI 46 Trial, and the bleeding risk of enoxaparin during the acute phase of ACS was 4.3% as shown in a meta-analysis.

We thus hypothesized that the safety and efficacy of rivaroxaban during the acute phase of ACS is non-inferior to enoxaparin and designed this prospective, randomized, open-label, active-controlled, multicenter study in participants with ACS (STEMI or NSTEMI or unstable angina). All eligible participants receiving background treatment of aspirin plus clopidogrel or ticagrelor will be randomly assigned to either receive oral rivaroxaban 2.5 mg twice daily or oral rivaroxaban 5 mg twice daily or enoxaparin 1mg/kg twice daily SC until hospital discharge or 12 hours before revascularization therapy for a maximum of 8 days.

03

Conditions studied

  • Acute Coronary Syndrome
  • Myocardial Infarction
  • Myocardial Ischemia
  • Unstable Angina
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Male or female aged ≥ 18 years
  • Diagnosed with ACS (STEMI, NSTEMI, unstable angina)
  • With an indication for short-term combination use of DAPT and enoxaparin.

Exclusion criteria

Exclusion Criteria:

  • Already received thrombolytic therapy or revascularization or needing revascularization therapy in 12 hours.
  • With glycoprotein IIb/IIIa receptor antagonist therapy.
  • With increased bleeding risk, such as but not limited to, active internal bleeding, bleeding, bleeding at a non-compressible site, or bleeding diathesis within 30 days of randomization; platelet count less than 90,000/μL at screening; intracranial hemorrhage; major surgery, of a parenchymal organ, or serious trauma within 30 days before randomization; clinically significant gastrointestinal bleeding within 12 months before randomization; an known to be>1.5 at the time of screening; abciximab bolus or infusion within the preceding 8 hours, or an eptifibatide or tirofiban bolus or infusion within the past 2 hours preceding randomization; or any other condition known to increase the risk of bleeding.
  • Severe concomitant condition or disease, such as cardiogenic shock at the time of randomization, ventricular arrhythmia to treatment at the time of randomization, calculated b 30 mL/min at screening, known significant liver disease (e.g., acute hepatitis, chronic active hepatitis, cirrhosis), or liver function test abnormalities (confirmed with repeat testing) which would require study drug discontinuation, i.e., aminoleucine transferase () >5 × the (ULN) or ALT >3 × ULN plus total >2 × ULN, prior ischemic stroke or transient ischemia attack, anemia (i.e., \< 10 g/ dL= at screening, known clinical history of infection at screening, substance abuse (drug or alcohol) problem within the previous 6 months or any severe condition such as cancer that would limit to less than 6 months.
  • With an indication for long-term oral anticoagulation therapy such as atrial fibrillation, venous thromboembolism, or prior placement of a mechanical heart valve.
  • With other for use of rivaroxaban and enoxaparin.
  • Enrolled in another clinical study.
Terms in these criteria, in plain language(13)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

Biopsy and archival tissue

A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.

Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.

INR, PT and aPTT (clotting tests)

Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.

Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.

Relapsed and refractory

Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.

Creatinine clearance (CrCl)

How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

05

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
2,055 participants (actual)

Study arms

  • Experimental
    Rivaroxaban 2.5 mg

    One 2.5 mg rivaroxaban tablet twice daily

    Drug: Rivaroxaban 2.5 mg

  • Experimental
    Rivaroxaban 5 mg

    One 5 mg rivaroxaban tablet twice daily

    Drug: Rivaroxaban 5 mg

  • Active comparator
    enoxaparin

    Enoxaparin 1mg/kg twice daily SC twice daily

    Drug: Enoxaparin

Interventions

  • One 2.5 mg rivaroxaban tablet twice daily until hospital discharge or 12 hours before revascularization therapy for a maximum of 8 days.

    Also known as: Xarelto

  • One 5 mg rivaroxaban tablet twice daily until hospital discharge or 12 hours before revascularization therapy for a maximum of 8 days.

    Also known as: Xarelto

  • Enoxaparin 1mg/kg twice daily SC until hospital discharge or 12 hours before revascularization therapy for a maximum of 8 days.

    Also known as: LWMH

06

What researchers measure

Primary outcomes

  1. Primary Safety Outcome: The percentage of patients with minor, clinically relevant non-major (CRNM) and major bleeding [International Society on Thrombosis and Haemostasis (ISTH) definition of bleeding]

    The percentage of patients with the first occurrence of bleeding event according to ISTH definition. The statistical analysis was based on the occurrence of the bleeding event from randomization to Month 6.

    Time frame: From the time of randomization (Day 1) up to completion of the follow up phase (Month 6)

  2. Primary Efficacy Outcome: The percentage of patients with the composite endpoint of cardiac death, myocardial infarction, re-revascularization or stroke.

    The percentage of patients with the first occurrence of the composite of death, myocardial infarction, re-revascularization or stroke. The statistical analysis was based on the time from randomization to the first occurrence of the event up to Month 6.

    Time frame: From the time of randomization (Day 1) up to completion of the follow up phase (Month 6).

Secondary outcomes

  1. The percentage of patients with the cardiac-related rehospitalization.

    The percentage of patients with the cardiac-related rehospitalization. The statistical analysis was based on the time from randomization to the first occurrence of the event up to Month 6.

    Time frame: From the time of randomization (Day 1) up to completion of the follow up phase (Month 6).

  2. The percentage of patients with the all-cause death.

    The percentage of patients with the all-cause death. The statistical analysis was based on the time from randomization to the first occurrence of the event up to Month 6.

    Time frame: From the time of randomization (Day 1) up to completion of the follow up phase (Month 6).

07

Study locations

24 sites
  • The First People's Hospital of Changde City
    Changde, Hunan 415003, China
  • Changsha Central Hospital
    Changsha, Hunan 410004, China
  • Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University
    Changsha, Hunan 410005, China
  • The Forth Hospital of Changsha
    Changsha, Hunan 410006, China
  • The First Affiliated Hospital of Hunan University of Chinese Medicine
    Changsha, Hunan 410007, China
  • The Second Xiangya Hospital of Central South University
    Changsha, Hunan 410011, China
  • The First Hospital of Changsha
    Changsha, Hunan 410013, China
  • The Third Xiangya Hospital of Central South University
    Changsha, Hunan 410013, China
  • The Third Hospital of Changsha
    Changsha, Hunan 410015, China
  • The Second People's Hospital of Hunan Province
    Changsha, Hunan 430100, China
  • The First People's Hospital of Chenzhou
    Chenzhou, Hunan 423000, China
  • The First Affiliated Hospital of University of South China
    Hengyang, Hunan 421001, China
  • The Second Affiliated Hospital of University of South China
    Hengyang, Hunan 421001, China
  • The First Affiliated Hospital of Hunan University of Medicine
    Huaihua, Hunan 418000, China
  • The First People's Hospital of Huaihua
    Huaihua, Hunan 418000, China
  • The First Affiliated Hospital of Jishou University
    Jishou, Hunan 416000, China
  • The First People's Hospital of Loudi
    Loudi, Hunan 417000, China
  • The Central Hospital of Shaoyang
    Shaoyang, Hunan 422000, China
  • Xiangtan Central Hospital
    Xiangtan, Hunan 411413, China
  • Xiangxiang People's Hospital
    Xianxiang, Hunan 411400, China
  • Yiyang Central Hospital
    Yiyang, Hunan 413000, China
  • Yongzhou First People's Hospital
    Yongzhou, Hunan 425000, China
  • The First People's Hospital of Yueyang
    Yueyang, Hunan 414000, China
  • Zhuzhou Central Hospital
    Zhuzhou, Hunan 412007, China
08

References and documents

Publications

  • Xiao Y, Tang L, Liu Q, Hu X, Fang Z, Zhou S. Rationale and Design of the H-REPLACE Study: Safety and Efficacy of LMWH Versus Rivaroxaban in ChinEse Patients HospitaLized with Acute Coronary SyndromE. Cardiovasc Drugs Ther. 2022 Feb;36(1):69-73. doi: 10.1007/s10557-020-07076-9. Epub 2020 Sep 23. PubMed 32965585 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 22, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03363035
Lead sponsor
Second Xiangya Hospital of Central South University
Responsible party
Shenghua Zhou (Professor, Second Xiangya Hospital of Central South University) — Principal investigator
First posted
Dec 5, 2017
Start date
Jan 15, 2018
Primary completion
Nov 11, 2021
Completion
Nov 30, 2021
Last update
Feb 22, 2022

Study contacts

Shenghua Zhou, Ph.D.
principal investigator · Second Xiangya Hospital of Central South University

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Feb 2022. You cannot join it, but the record below documents what was studied.

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Studies of the drug tested here: Rivaroxaban

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