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Trial registered on ANZCTR

Registration number
Ethics application status
Date submitted
Date registered
Date last updated
Date data sharing statement initially provided
Type of registration
Prospectively registered

Titles & IDs
Public title
Anti-anginal Efficacy of Ticagrelor in Coronary Slow Flow.
Scientific title
Ticagrelor In Coronary microvascular dysfunction (TIC) Program: Anti-anginal Efficacy in Primary Coronary Microvascular Disorders.
Secondary ID [1] 288501 0
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Coronary Slow Flow Phenomenon 297571 0
Condition category
Condition code
Cardiovascular 297767 297767 0 0
Diseases of the vasculature and circulation including the lymphatic system

Study type
Description of intervention(s) / exposure
Oral administration comprising the dose of 90mg Ticagrelor or Placebo twice daily for a total period of 8 weeks (4 weeks each) to assess the effect of ticagrelor on angina frequency in patients with Coronary Slow Flow who experience angina at least 3 times/week.

After the first 4 weeks (Phase 1) completed, two weeks washout period is allowed, patients will not need to take any study tablets specifically for this trial in the washout period.

The investigational product will be packed in bottle covering the period from one visit to the next. Each patient will receive and return the designated bottle at the regular site visits.
Intervention code [1] 293866 0
Treatment: Drugs
Comparator / control treatment
This study is designed as a double-­blind, placebo controlled, crossover study. Placebo drug will involve taking a drug (for 4 weeks) that looks similar in appearance to Ticagrelor but will not affect the patient in any way.

Placebo consists of lactose monohydrate, microcrystalline cellulose, and magnesium stearate. The composition of the film- coat is identical to that of the corresponding strength of ticagrelor active tablets.
Control group

Primary outcome [1] 297295 0
To assess the effect of ticagrelor 90mg bd on angina frequency in patients with Coronary Slow Flow who experience angina at least 3 times/week.

Patients will maintain an angina diary throughout this study period. This diary will describe the frequency and characteristics of chest pain (i.e. the time of day, severity, triggers, etc.). In addition, we will administer Seattle Angina Questionnaire (SAQ) at screening and at the end of each phases.
Timepoint [1] 297295 0
Before the administration of any drug : For 2 weeks using the angina diary and SAQ
Medication phase 1 : For 4 weeks using the angina diary
At the end of Phase 1: SAQ
Washout period : For 2 weeks using the angina diary
Medication phase 2 (cross over) : For 4 weeks using the angina diary
At the end of Phase 2: SAQ

Secondary outcome [1] 320650 0
(i) Frequency of prolonged angina episodes (ie episodes persisting > 20 minutes)
- assessed from patient's self reported angina diary
Timepoint [1] 320650 0
Angina diary is completed every week and frequency compared as below.
-At baseline (Before the administration of the drug)
-End of Phase 1
-End of Phase 2

Secondary outcome [2] 321637 0
Sublingual nitrate consumption assessed by angina diary
Timepoint [2] 321637 0
-At baseline (Before the administration of the drug)
-End of Phase 1
-End of Phase 2
Secondary outcome [3] 321638 0
Angina frequency as assessed by Seattle Angina Questionnaire (SAQ)
Timepoint [3] 321638 0
-At baseline (Before the administration of the drug)
-End of Phase 1
-End of Phase 2
Secondary outcome [4] 321639 0
Physical health summary scores assessed by Short form 36
Timepoint [4] 321639 0
-At baseline (Before the administration of the drug)
-End of Phase 1
-End of Phase 2
Secondary outcome [5] 321640 0
Plasma adenosine levels will be measured by high-performance liquid chromatography
Timepoint [5] 321640 0
-At baseline (Before the administration of the drug)
-End of Phase 1
-End of Phase 2
Secondary outcome [6] 321645 0
Patient medication compliance assessed by asking each patient to return their product containers and a tablet count performed at each visit.
Timepoint [6] 321645 0
-End of Phase 1
-End of Phase 2
Secondary outcome [7] 322061 0
mental health summary scores assessed by Short form 36
Timepoint [7] 322061 0
-At baseline (Before the administration of the drug)
-End of Phase 1
-End of Phase 2

Key inclusion criteria
For inclusion in the study subjects should fulfill the following criteria:
I. Provision of informed consent prior to any study specific procedures
II. Female and/or male patients aged greater than or equal to 18 years
III. Documented angiographic features of coronary slow flow. as defined by TIMI-2 flow (i.e. requiring more than 3 beats to opacify a major epicardial vessel) in the absence of obstructive coronary artery disease (i.e. no epicardial lesion greater than 50%).
IV. Chest pain occurring more than or equal to 3 times/week in the preceding two weeks.
Minimum age
18 Years
Maximum age
No limit
Both males and females
Can healthy volunteers participate?
Key exclusion criteria
Subjects should not enter the study if any of the following exclusion criteria are fulfilled:
I. Acute coronary syndrome admission within the preceding month; i.e. hospital admission for prolonged rest associated with new ischaemic ECG changes and/or a troponin rise.
II. Secondary causes of coronary slow flow including - the no-reflow phenomenon and myocarditis.
III. Secondary causes of angina including - clinically significant anaemia (haemoglobin less than 100g/dL), uncontrolled atrial fibrillation (i.e. ventricular response rate greater than 108 bpm), haemodynamically significant aortic stenosis (estimated mean aortic valve gradient equal to 50mmHg).

Exclusions from contraindications of Consumer Medical Information BRILINTA (Registered Trademark) ticagrelor product information Doc ID-001619899 v4.0
IV. Patients taking regular Aspirin, non-steroidal anti-inflammatory drugs and oral coagulants.
V. Patients scheduled for any surgeries

Study design
Purpose of the study
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
The Pharmacy Unit at the Queen Elizabeth Hospital will manage the randomisation so all Investigators and Participants are blinded throughout the study and analysis period.
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?
The people receiving the treatment/s

The people assessing the outcomes
The people analysing the results/data
Intervention assignment
Other design features
Phase 4
Type of endpoint(s)
Statistical methods / analysis
Assessment of Ticafrelor’s Anti-angina efficacy will be undertaken via blinded analysis of the angina diary endpoints and will be performed by comparison between patients with respect to treatment order utilizing Mann-Whitney U tests.

Based upon previous experience, the mean total angina episodes expected in this study population is 28+/-31 episodes/month. This study showed 56% of reduction in total angina frequency. Thus using a crossover study design to detect a 50% change in frequency with ticagrelor, 29 patients would be required for 80% power at alpha =0.05. Accounting for dropouts, 35 will be patients recruited.

Recruitment status
Date of first participant enrolment
Date of last participant enrolment
Date of last data collection
Sample size
Accrual to date
Recruitment in Australia
Recruitment state(s)
Recruitment hospital [1] 5248 0
The Queen Elizabeth Hospital - Woodville
Recruitment postcode(s) [1] 12716 0
5011 - Woodville South

Funding & Sponsors
Funding source category [1] 292914 0
Commercial sector/Industry
Name [1] 292914 0
AstraZeneca Pty Ltd
Address [1] 292914 0
5 Alma Road
North Ryde NSW 2113
Country [1] 292914 0
Primary sponsor type
University of Adelaide
University of Adelaide- The Queen Elizabeth Hospital campus
Level 5B- Dept of Medicine,
28, Woodville Road
Woodville South
SA 5011
Secondary sponsor category [1] 291669 0
Name [1] 291669 0
Address [1] 291669 0
Country [1] 291669 0

Ethics approval
Ethics application status
Ethics committee name [1] 294390 0
Human Research Ethics Committee (The Queen Elizabeth Hospital/Lyell McEwin Hospital/Modbury Hospital)
Ethics committee address [1] 294390 0
The Queen Elizabeth Hospital
Basil Hetzel Institute DX465101
28 Woodville Road
Woodville South SA 5011
Ethics committee country [1] 294390 0
Date submitted for ethics approval [1] 294390 0
Approval date [1] 294390 0
Ethics approval number [1] 294390 0

Brief summary
The Ticagrelor in Coronary microvascular dysfunction (TIC) program is an extensive research program investigating the potential therapeutic benefits of ticagrelor in patients with a condition referred as slow flow phenomenon, speculating that its benefits extend beyond its anti-platelet effects and suggesting that it may have an important role in the management of these patients. Ticagrelor has been developed as an anti- platelet agent and is currently utilised in the management of heart attack and unstable angina. Slow flow means heart muscle does not receive blood quickly enough and as a consequence patient may experience chest pain. Medical treatment is directed towards controlling the angina pain. Taking Ticagrelor orally twice a day, which has the ability to relax the small microscopic blood vessels in the heart, may lead to better blood flow to the heart muscle and reduce the associated symptoms of chest pain. However, at present, there is no scientific evidence available demonstrating how effective ticagrelor is in patients with slow flow. The aim of this study is to investigate whether taking ticagrelor (90mg twice daily for 4 weeks) can reduce frequency of chest pain in these slow flow patients.
Trial website
Trial related presentations / publications
Public notes

Principal investigator
Name 63394 0
Prof John Beltrame
Address 63394 0
The Queen Elizabeth Hospital
Level 5B Discipline of Medicine
28 Woodville Road
Woodville South, SA, 5011
Country 63394 0
Phone 63394 0
+61 8 8222 6740
Fax 63394 0
Email 63394 0
Contact person for public queries
Name 63395 0
Ms Sivabaskari Pasupathy
Address 63395 0
The Queen Elizabeth Hospital
Level 2 Basil Hetzel Institute
28 Woodville Road
Woodville South SA 5011
Country 63395 0
Phone 63395 0
+61 8 8222 7719
Fax 63395 0
Email 63395 0
Contact person for scientific queries
Name 63396 0
Ms Sivabaskari Pasupathy
Address 63396 0
The Queen Elizabeth Hospital
Level 2 Basil Hetzel Institute
28 Woodville Road
Woodville South SA 5011
Country 63396 0
Phone 63396 0
+61 8 8222 7719
Fax 63396 0
Email 63396 0

Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No/undecided IPD sharing reason/comment
What supporting documents are/will be available?
Summary results
No Results