Blood vessel test may predict heart attack risk
NCT ID NCT00868855
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at whether measuring a natural clot-busting substance (t-PA) released from heart arteries could predict future heart attacks or death in people with mild to moderate coronary artery disease. Researchers gave a small dose of bradykinin into the heart artery during a routine catheterization and measured t-PA levels. The study was small (16 participants) and terminated early, so results are limited.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 1
The first testing in people. Mainly checks safety and dose, usually in a small group.
- Participants
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16 people
The number who actually took part.
- Start date
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Dec 2003
- Finished
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Dec 2010
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Age \>18 year old male and female patients 2. All patients are referred for elective cardiac catheterization based on clinical indication 3. Cath shows mild or moderate (\<70% stenosis) CAD that does not require mechanical intervention Exclusion Criteria: 1. Severe stenosis requires intervention. 2. Significant left main coronary artery disease (\>40%). 3. Acute MI or acute coronary syndrome with enzyme elevation or ischemic EKG changes 4. Patients with severe left ventricular dysfunction (EF\<35%) 5. Prior history of myocardial infarction 6. History of stroke within 3 months. 7. Recent history of thrombolytic 8. History of coronary intervention within previous 6 months. 9. Patients with history of coronary spasm 10. Patients with congestive heart failure (class III and IV).
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Vanderbilt University Medical Center
Nashville, Tennessee, 37232, United States
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Other studies related to the condition(s) this trial covers.
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