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Acute Chest Pain Treatment and Evaluation (ACTION) Study

Primary Purpose

Chest Pain

Status
Completed
Phase
Phase 4
Locations
Singapore
Study Type
Interventional
Intervention
Stress nuclear scan
Sponsored by
Singapore General Hospital
About
Eligibility
Locations
Outcomes
Full info

About this trial

This is an interventional treatment trial for Chest Pain focused on measuring Stress nuclear scan, Acute chest pain

Eligibility Criteria

25 Years - undefined (Adult, Older Adult)All SexesDoes not accept healthy volunteers

Inclusion Criteria:

  • 25 years and above
  • Chest pain suggestive of the angina
  • 12 leads ECG non-diagnostic for myocardial ischaemia or AMI
  • diabetes mellitus
  • family history of young AMI (less than 50 years old) There is no lower limit of age for those patients in the last two categories

Exclusion Criteria:

  • ECG diagnostic of AMI or acute myocardial ischaemia (as defined by the new Q wave , ST elevation or depression greater than 1mm or 0.1 millivolts in two or more contiguous leads)
  • Congestive heart failure or hypotensive patients
  • Persistent chest pain consistent with unstable angina

Sites / Locations

  • Singapore General Hospital

Outcomes

Primary Outcome Measures

Cardiac related death
Ventricular Fibrillation
Myocardial Infarction
Cardiogenic shock requiring intra-aortic balloon pump circulatory assistance
Acute pulmonary oedema requiring endotracheal intubation

Secondary Outcome Measures

Requirement of emergency coronary revascularisation procedures like Percutaneous Transluminal Coronary Angioplasty (PTCA) or Coronary Artery Bypass Graft (CABG)

Full Information

First Posted
February 12, 2007
Last Updated
February 9, 2017
Sponsor
Singapore General Hospital
Collaborators
National Medical Research Council (NMRC), Singapore, National Heart Centre Singapore
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1. Study Identification

Unique Protocol Identification Number
NCT00434564
Brief Title
Acute Chest Pain Treatment and Evaluation (ACTION) Study
Official Title
A Randomised Trial on Early Stress Nuclear Scan for Patients Presented to the Emergency Department (ED) With Chest Pain But Non-diagnostic Electrocardiography-Acute Chest Pain Treatment and Evaluation (ACTION) Study
Study Type
Interventional

2. Study Status

Record Verification Date
February 2017
Overall Recruitment Status
Completed
Study Start Date
August 2000 (undefined)
Primary Completion Date
undefined (undefined)
Study Completion Date
May 2002 (undefined)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Singapore General Hospital
Collaborators
National Medical Research Council (NMRC), Singapore, National Heart Centre Singapore

4. Oversight

5. Study Description

Brief Summary
Objective To compare the incidence of adverse cardiac events among the patients discharged after evaluation through ACTION protocol with those through conventional protocol. The adverse cardiac events for the follow-up are defined as any of the followings: Cardiac related death Ventricular fibrillation Myocardial infarction Cardiogenic shock requiring the inta-aortic balloon pump circulatory assistance Acute pulmonary oedema requiring endo-tracheal intubation To study the sensitivity / predictive values of the various components of ACTION :12 lead ECG ST monitoring , serial serum markers for myocardial necrosis (myoglobin, CKMB, TnT, graded exercise testing, stress tetrofosmin scan/ stress echocardiography) in predicting adverse cardiac events. Design -prospective randomised clinical trial Participants -patients above 25 years of age presenting to the ED with chest pain consistent with myocardial ischaemia but with a 12 lead ECG non-diagnostic of myocardial ischaemia . Intervention Patients were monitored continuously with a 12 lead ECG and ST segment trend monitoring and blood will be drawn at 0,3,6 hours after arrival at ED for serial myoglobin, creatine kinase MB isoenzyme (CKMB) and Troponin T (TnT) . Patients who have ECG and blood test consistent with myocardial necrosis were admitted to the CCU. A senior doctor in the ED reviewed patients who were not admitted after 6 hours of observation. Study Group A stress tetrofosmin nuclear scan was done . Patients were then admitted and discharged depending on the results of the stress tetrofosmin scan. Control group (conventional protocol) Patients were then be admitted or discharged at the discretion of the senior ED doctor. Measurement Patients were followed up at 1 week , 2 weeks , one month and six months for any adverse cardiac events such as cardiac related death , ventricular fibrillation , and myocardial infarction. Statistical analysis Logistic regression analysis were used to compare the proportion of adverse events in the two treatment groups.
Detailed Description
Identifying the cause of chest pain is a challenge to the Emergency Physician.Coronary artery disease is the most common group of Emergencies that has a high potential for rapidly developing a lethal outcome. Significant proportion of patients who presented to and released from the Emergency Department (ED)with AMI or unstable angina develop poor outcomes. This is because a large proportion of AMI present atypically.The initial single 12 lead ECG done at an ED is only 50% sensitive for AMI.Serial ECGs have been shown to improve sensitivity by 25%.Because of these limitations, physicians may admit patients with chest pain, liberally. On the other hand only 25-50 % of patients admitted to CCU without AMI are eventually determined to have Acute Coronary Syndrome. Several serum cardiac markers such as myoglobulin, CKMB and Troponin T (TnT) are found to increase sensitivity in detecting AMI than just history and ECG. Among them TnT is a better predictor of adverse cardiac event than CKMB. Absence of TnT elevation identifies a lower risk group of patients , but not necessarily a low risk group since TnT cannot detect myocardial ischaemia in the absence of myocardial injury or myocyte cell death. There has been some chest pain evaluation practice in the ED using the graded exercise testing to screen for severe ischaemia. Several studies have suggested the safety of exercise testing in low risk patients presenting to ED with chest pain.The use of exercise testing has been found to be a powerful tool for prognostication. Stress nuclear imaging was also performed at the end of 6 hours of observation instead of graded exercise stress testing alone. There will be a significant proportion of patients who will not be eligible for standard exercise treadmill stress test due to poor exercise tolerance. Even for those who underwent exercise testing, studies showed that 24.2% were inconclusive because of baseline ECG abnormalities (left ventricular hypertrophy, left bundle-branch block or patient on digoxin). Some patients may not be able to achieve the required exercise level. Studies have shown that the mean sensitivity and specificity for graded exercise testing to detect severe coronary artery disease were 68 and 77% respectively. The sensitivity of graded exercise test for detecting single vessel disease is lower. Stress nuclear imaging is valuable in establishing the prognosis of patients with a low likelihood of coronary artery disease. Stress nuclear scans have additive prognostic value to graded exercise test especially if the latter is abnormal or non-diagnostic.For those who cannot exercise, pharmacological stress tetrofosmin with dobutamine or adenosine will be performed instead. The efficacy of acute chest pain evaluation centre has not been compared with a conventional protocol in a prospective randomised clinical trial. Aims To compare the incidence of adverse cardiac events among patients discharged after evaluation through ACTION with those through conventional protocol. Adverse cardiac events are defined as any of the following: i) Cardiac related death ii) Ventricular fibrillation iii) Myocardial infarction iv) Cardiogenic shock requiring intra-aortic balloon pump circulatory assistance v) Acute pulmonary oedema requiring endotracheal intubation To study the sensitivity specificity graded exercises testing, stress tetrofosmin scan in predicting adverse cardiac event 5. Treatment Plan First 6 hours Once informed consent was obtained, the patient was then enrolled. They were put on continuous ECG monitoring. Ten mls of blood were drawn at 0,3,6 hours after arrival at the ED for myoglobin, CKMB and TnT analysis. Blood for LDL & HDL were also drawn at 0 hour as well with the cardiac markers. The old hospital case record of patient, if available, were retrieved and previous ECG's were also compared against the new ECG. Patients who develop recurring chest pain consistent with myocardial ischaemia, ST segment elevation or depression on continuous 12 lead ECG monitoring indicating myocardial necrosis, or have positive CKMB (> 5), Troponin T (> 0.01), were admitted to the Department of Cardiology. If the patient was not admitted at the end of 6 hours, he/she were reviewed by a ED Registrar/Associate Consultant/Consultant. The senior ED doctor reviewed the patient, his/ her 12 lead ECGs and blood results for serum markers for myocardial necrosis. After first 6 hours - Study Group (Intervention Protocol) The patient then underwent a stress tetrofosmin scan within 24 hours of presentation (exercise or pharmacological stress for those who cannot exercise). Tetrofosmin scans was be done at NHC or the Department of Nuclear Medicine, SGH. Patients were monitored until the test was completed. If the stress tetrofosmin scan turned out to be positive, the patient was then admitted to the hospital for further management. If the stress tetrofosmin scan was negative, the patient was released from ED with instructions for follow-up in the cardiology clinic as an outpatient. Control Group (conventional protocol) The patient with high or intermediate risk for coronary artery disease (CAD) as defined by Agency for HealthCare Policy and Research guidelines for Unstable Angina was admitted. The indicators for coronary artery disease are definite angina, T wave inversion> 1 mm in leads with dominant R waves and diabetes. If in doubt, patients were also admitted. Patients who were discharged from the ED will be reviewed by a cardiologist at the NHC cardiac clinic within two weeks. 6. Follow Up Patients were followed up at one month, six months and one year for any primary or secondary endpoints.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Chest Pain
Keywords
Stress nuclear scan, Acute chest pain

7. Study Design

Primary Purpose
Treatment
Study Phase
Phase 4
Interventional Study Model
Parallel Assignment
Masking
None (Open Label)
Allocation
Randomized
Enrollment
1690 (false)

8. Arms, Groups, and Interventions

Intervention Type
Procedure
Intervention Name(s)
Stress nuclear scan
Primary Outcome Measure Information:
Title
Cardiac related death
Title
Ventricular Fibrillation
Title
Myocardial Infarction
Title
Cardiogenic shock requiring intra-aortic balloon pump circulatory assistance
Title
Acute pulmonary oedema requiring endotracheal intubation
Secondary Outcome Measure Information:
Title
Requirement of emergency coronary revascularisation procedures like Percutaneous Transluminal Coronary Angioplasty (PTCA) or Coronary Artery Bypass Graft (CABG)

10. Eligibility

Sex
All
Minimum Age & Unit of Time
25 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria: 25 years and above Chest pain suggestive of the angina 12 leads ECG non-diagnostic for myocardial ischaemia or AMI diabetes mellitus family history of young AMI (less than 50 years old) There is no lower limit of age for those patients in the last two categories Exclusion Criteria: ECG diagnostic of AMI or acute myocardial ischaemia (as defined by the new Q wave , ST elevation or depression greater than 1mm or 0.1 millivolts in two or more contiguous leads) Congestive heart failure or hypotensive patients Persistent chest pain consistent with unstable angina
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Lim S Han, MBBS, FRCS
Organizational Affiliation
Department of Emergency Medicine, Singapore General Hospital
Official's Role
Principal Investigator
Facility Information:
Facility Name
Singapore General Hospital
City
Singapore
Country
Singapore

12. IPD Sharing Statement

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Acute Chest Pain Treatment and Evaluation (ACTION) Study

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