Condition category
Circulatory System
Date applied
Date assigned
Last edited
Prospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status

Plain English Summary

Not provided at time of registration

Trial website

Contact information



Primary contact

Prof Steve Goodacre


Contact details

Medical Care Research Unit
University of Sheffield
Regent Court
30 Regent Street
S1 4DA
United Kingdom
+44 (0)114 222 0750

Additional identifiers

EudraCT number number

Protocol/serial number

HTA 06/302/19

Study information

Scientific title


RATPAC (Randomised Assessment of Treatment using Panel Assay of Cardiac markers)

Study hypothesis

To evaluate the clinical effectiveness and cost-effectiveness of the most promising point-of-care cardiac marker panel currently used in the Emergency Department.

Please note that, as of 11/05/2009, the anticipated end date of this trial has been updated from 31/03/2009 to 30/09/2009.

Ethics approval

Ethics approval received from the Leeds East Research Ethics Committee on the 27th March 2007 (ref: 07/Q1206/22).

Study design

A pragmatic randomised controlled trial

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Patient information sheet can be found at:


Chest pain due to suspected but not proven AMI


This is a pragmatic randomised controlled trial and economic evaluation of a point-of-care cardiac marker panel in the management of patients with suspected, but not proven, Acute Myocardial Infarction (AMI) in six Emergency Departments in the United Kingdom. Emergency Department staff will identify eligible patients, provide trial information and obtain written consent.

Participants will be randomised to receive either:
1. Diagnostic assessment using the point-of-care biochemical marker panel, or
2. Conventional diagnostic assessment without the panel.

The only difference between the two arms of the trial will be that patients in the intervention arm will receive testing with the point-of-care panel. The use of all other tests and treatments, and decision-making in the Emergency Department, will be at the discretion of the attending clinician.

The point-of-care cardiac marker panel will comprise Creatine Kinase - Myocardial Bands (CK-MB) (mass), myoglobin and troponin I, measured at presentation and 90 minutes later, using the Biosite Triage cardiac marker panel. This combination has been widely evaluated in practice. An independent evaluation by the Centre for Evidence-based Purchasing found that the Biosite system was reliable and easy to use, and that the ability of the point-of-care method to detect a positive troponin was similar to that of laboratory methods.

Intervention type



Not Specified

Drug names

Primary outcome measure

Proportion of patients successfully discharged home after Emergency Department assessment, defined as discharge with no adverse event (defined in next section) during the following three months.

Secondary outcome measures

1. Health utility measured using the Euro Quality of life (EQ-5D) self-complete questionnaire at one and three months after attendance
2. Satisfaction with care measured at one month after attendance using a modified Group Health Association of America questionnaire that has been used successfully in previous studies of diagnostic strategies for acute chest pain
3. The proportion of patients managed on the coronary care unit, receiving cardiac medications (such as heparin, clopidogrel or glycoprotein IIb/IIIa inhibitors) or receiving cardiac interventions (such as angiography, percutaneous intervention or bypass grafting)
4. Re-attendance at and/or re-admission to hospital over the following three months
5. Adverse events (death, non-fatal AMI, emergency revascularisation or hospitalisation for myocardial ischaemia)
6. The proportion of admitted patients ultimately diagnosed as having AMI by European Society of Cardiology (ESC)/American College of Cardiology (ACC) criteria

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

People presenting to the Emergency Department with chest pain due to suspected but not proven Acute Myocardial Infarction (AMI) in whom a negative point-of-care marker test could potentially rule out AMI and allow discharge home.

Participant type


Age group

Not Specified


Not Specified

Target number of participants


Participant exclusion criteria

1. Patients with diagnostic Electrocardiogram (ECG) changes for AMI or high-risk acute coronary syndrome (more than 1 mm ST deviation or more than 3 mm inverted T waves). These patients are at high risk of adverse outcome and require inpatient care even if marker tests are negative
2. Patients with known coronary heart disease presenting with prolonged (more than one hour) or recurrent episodes of typical cardiac-type pain. These patients have unstable angina and require inpatient care for symptom control even if marker tests are negative
3. Patients with proven or suspected serious non-coronary pathology (e.g. pulmonary embolus) that requires inpatient care even if AMI is ruled out
4. Patients with co-morbidity or social problems that require hospital admission even if AMI can be ruled out
5. Patients with an obvious non-cardiac cause (e.g. pneumothorax or muscular pain), in whom AMI can be excluded as a possible cause without resorting to further diagnostic testing
6. Patients presenting more than 12 hours after their most significant episode of pain, for whom a single troponin measurement would clearly be more appropriate than point-of-care panel testing
7. Previous participants in the RATPAC trial
8. Patients who are unable to understand the trial information due to cognitive impairment
9. Non-English speaking patients for whom translation facilities are not available

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

Medical Care Research Unit
S1 4DA
United Kingdom

Sponsor information


University of Sheffield (UK)

Sponsor details

Research Services Department
New Spring House
231 Glossop Road
S10 2GW
United Kingdom
+44 (0)114 222 1448

Sponsor type




Funder type


Funder name

NIHR Health Technology Assessment Programme - HTA (UK)

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Basic results (scientific)

Publication list

1. 2011 results in
2. 2011 results in
3. 2013 results in

Publication citations

  1. Results

    Goodacre SW, Bradburn M, Cross E, Collinson P, Gray A, Hall AS, , The Randomised Assessment of Treatment using Panel Assay of Cardiac Markers (RATPAC) trial: a randomised controlled trial of point-of-care cardiac markers in the emergency department., Heart, 2011, 97, 3, 190-196, doi: 10.1136/hrt.2010.203166.

  2. Results

    Goodacre S, Bradburn M, Fitzgerald P, Cross E, Collinson P, Gray A, Hall AS, The RATPAC (Randomised Assessment of Treatment using Panel Assay of Cardiac markers) trial: a randomised controlled trial of point-of-care cardiac markers in the emergency department., Health Technol Assess, 2011, 15, 23, iii-xi, 1-102, doi: 10.3310/hta15230.

  3. Results

    Collinson PO, Gaze DC, Thokala P, Goodacre S, Randomised Assessment of Treatment using Panel Assay of Cardiac markers--Contemporary Biomarker Evaluation (RATPAC CBE)., Health Technol Assess, 2013, 17, 15, v-vi, 1-122, doi: 10.3310/hta17150.

Additional files

Editorial Notes