About this trial
Anaemia is common in patients with acute coronary syndrome (ACS) and is associated with significant recurrent bleeding risk and major adverse cardiovascular event (MACE). Esophageal-gastro-Duodenoscopy (EGD) is commonly used as an initial investigation for anaemia but is often non-diagnostic. Magnetically Controlled Capsule Endoscopy (MCCE) being less invasive and with comparable diagnostic accuracy as EGD, might be used as an alternative initial investigation for anaemia in patients with ACS.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
the diagnosis of ACS as defined by symptoms of chest pain or shortness-of-breath, abnormal electrocardiogram and positive enzyme, requiring coronary intervention
new-onset anaemia as defined by Hb<11 g/dL on admission blood taking
Disqualifiers
History of active haematological disease including hemoglobinopathies such as thalassemia, Myelodysplastic syndromes, haematological malignancy, aplastic anaemia, or autoimmune haemolytic anaemia.
Patients with known active gastrointestinal malignancy.
Contraindications for CE: suspected or known gastrointestinal obstruction, stenosis, fistula, diverticula, presence of gastrointestinal obstruction symptoms such as pain or dysphagia; inoperative conditions or refusal to undergo abdominal surgery if required; history of laparotomy, gastric or bowel surgery; presence of metallic implants that is not MRI conditional.
Contraindications for EGD: Possible gastrointestinal perforation, medically unstable patients, patient with known pharyngeal diverticulum, and patients with recent head and neck trauma.
Trial design
Parallel
Treatments tested in this trial
Magnetically Controlled Capsule Endoscopy (MCCE)
Procedure/Surgery. The MCCE used in this study is the magnetically controlled capsule endoscopy (MCE, AnPx USA) which is a capsule measuring 28x12mm, and contains a permanent magnet inside its dome. Images are captured and recorded at 2 frames/s
Esophageal-gastro-Duodenoscopy (EGD)
Procedure/SurgeryEsophageal-gastro-Duodenoscopy (EGD) is commonly performed to look for source of bleeding in patients with anaemia. However, from our own analysis and from retrospective studies of EGD in patients with ACS, EGD finding was normal or non-significant in 20-80% patients14-16. Moreover, EGD was associated with non-negligible periprocedural risks in patients with ACS, including death directly attributed to EGD (9.1%; 95% CI 7.6-10.9%), hypotension (24.1%; 95% CI 17.0-32.9%), arrhythmias (8.3%; 95% CI 4.5-15.1%) and recurrent ACS (6.5%; 95% CI 3.2-12.8%)
Treatment groups
Trial outcomes
Primary outcomes
the occurrence of recurrent bleeding
A bleeding event will be defined according to international consensus by the occurrence of any of the followings: 1) overt bleeding of gastroduodenal origin including fresh hematemesis, bloody nasogastric aspiration, melena after normalization of stool colour, or haematochezia after normalization of stool colour, or 2) bleeding of presumed occult gastrointestinal origin with a documented reduction in haemoglobin concentration of ≥2 g/dl or reduction in the haematocrit by 10% or more from the baseline.
Secondary outcomes
Need for any transfusion
Need for any transfusion
Any bleeding by Thrombolysis in Myocardial Infarction (TIMI), Bleeding Academic Research Consortium (BARC) and GUSTO definitions
TIMI flow grade is a method used to assess coronary artery blood flow during and after thrombolytic therapy in patients with acute myocardial infarction. It's a standardized way to grade the degree of reperfusion, ranging from complete occlusion (Grade 0) to complete perfusion (Grade 3). BARC: Type 1: Minimal bleeding, not actionable. Type 2: Clinically evident but minor; requires treatment. Type 3: Significant bleeding, divided into 3A (moderate, requires transfusion), 3B (major, may need surgery), and 3C (critical, such as intracranial bleeding). Type 4: Bleeding related to CABG procedures.
Change in Major adverse cardiac events
MACE as defined by death of cardiovascular origin, non-fatal myocardial infarction, non-fatal stroke, or clinically driven target vessel revascularization.
Any adverse events and complications from MCCE and/or from EGD
Any adverse events and complications from MCCE and/or from EGD
Sponsors and contacts
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Chinese University of Hong Kong
Lead sponsor
Health and Medical Research Fund
Collaborator
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