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Study identifier: NCT03998319 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

A Study of Low-dose Intracoronary Thrombolytic Therapy in STEMI (Heart Attack) Patients.

Condition: STEMI · Elevated IMR (>32)  ·  Sponsor: University of Sydney

PhasePhase 3
Planned participants445
Who can joinAll sexes, 18 Years to no upper limit
Healthy volunteersNo

About this study

Heart attacks are caused by a blood clot blocking the blood vessels of the heart, preventing blood getting to the heart muscle. Opening up the artery with a balloon (angioplasty) and a small mesh tube (stent) although life saving can cause this clot to break up and get washed downstream, which can make the heart attack worse. The investigators can measure the amount of damage caused to the microcirculation by calculating the IMR (Index of Microcirculatory resistance). This can be measured by a wire in the coronary artery with a pressure sensor at the tip. If the IMR is elevated, it is suggestive of extensive microcirculatory damage. A clot dissolving medicine can be administered in the artery to try and reduce the IMR which can reduce damage to the heart muscle and improve outcomes. Impaired microcirculatory perfusion in patients as a result of ST-elevation myocardial infarction (STEMI) is associated with poor clinical outcomes. This project seeks to identify patients with impaired microcirculatory perfusion after STEMI and to assess whether acute improvement in microcirculatory perfusion in these patients by the use of intracoronary thrombolytic therapy results in improved clinical outcomes.

This description comes directly from the study's public registry record.

Talk to the study team

Martin Ng, MBBS (Hons)  ·  +614 3407 8507  ·  martin.ng@sydney.edu.au

Rebecca Mister  ·  +612 9562 5000  ·  RESTORE-MI.Study@sydney.edu.au

Always discuss trial participation with your own doctor first.

Locations (22)

Bankstown-Lidcombe HospitalBankstown, New South Wales, AustraliaNot Yet Recruiting
Royal Prince Alfred HospitalCamperdown, New South Wales, AustraliaRecruiting
Concord Repatriation General HospitalConcord, New South Wales, AustraliaRecruiting
Northern Beaches HospitalFrenchs Forest, New South Wales, AustraliaNot Yet Recruiting
Liverpool HospitalLiverpool, New South Wales, AustraliaRecruiting
John Hunter HospitalNew Lambton Heights, New South Wales, AustraliaRecruiting
Prince of Wales HospitalRandwick, New South Wales, AustraliaNot Yet Recruiting
Wollongong HospitalWollongong, New South Wales, AustraliaWithdrawn
Royal Adelaide HospitalAdelaide, South Australia, AustraliaRecruiting
Lyell McEwin HospitalElizabeth Vale, South Australia, AustraliaRecruiting
Box Hill HospitalBox Hill, Victoria, AustraliaRecruiting
Jessie McPherson Private HospitalClayton, Victoria, AustraliaRecruiting

+ 10 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT03998319