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Cardiovascular DiseasesPhase 3NCT00000503

Randomized Clinical Trial of Non-Surgical Reperfusion of the Coronary Arteries

A Phase 3 study testing nitroglycerin, streptokinase and heart catheterization in people with Cardiovascular Diseases and Coronary Disease, run by National Heart, Lung, and Blood Institute (NHLBI).

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

To assess the effect of non-surgical reperfusion on infarct size in patients with acute myocardial infarction. Read more about this study

Who is it for?
Ages 18 to 77 years
What is being tested?
nitroglycerin, streptokinase and heart catheterization
Type of treatment
Surgery or procedure
How many people
Not given
Where
No sites listed yet
Study dates
Aug 1982to Oct 1987
Phase
Phase 3
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 77 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Men and women, under 78 years of age. Suspected of having an acute myocardial infarction and who could be randomized within 12 hours of onset of qualifying pain.

About this study

To assess the effect of non-surgical reperfusion on infarct size in patients with acute myocardial infarction.

Read the detailed description

BACKGROUND:

Angiographic studies in the acute stage of myocardial infarction have shown complete occlusion in 75-85 percent and subtotal lesions in the remaining cases. Evidence for spasm in acutely occluded arteries has been reported. However, the majority of pathological as well as intraoperative examinations have yielded thrombotic material at the site of complete obstruction. Indirect evidence of thrombotic material was provided by successful intracoronary thrombolysis in 80 percent of infarct patients with complete obstruction. There could be causative relationships between spasm, intimal damage and coronary thrombosis. Selective applications of spasmolytic and/or thrombolytic substances into occluded vessels enabled high local concentrations with doses that caused little or no systemic effect. Angiographic verification of the results of this pharmacotherapy would help to clarify the role of spasm and thrombus in the pathogenesis of the acute coronary occlusion.

Reperfusion in man has been achieved by coronary by-pass surgery in the acute stage of infarction. Follow-up angiography revealed significant improvement of left ventricular function. Intracoronary streptokinase infusion resulted in recanalization of acute coronary occlusion in 80 percent of cases within 20-30 minutes of infusion time. Reperfusion achieved by intervention angiography has been associated with improved local wall motion as well as improved left ventricular function. Improvement in left ventricular function depended on the duration of symptoms prior to reperfusion and on the presence or absence of collateral blood flow. Available data suggested that improvement was more likely to occur if reperfusion was achieved within 3-4 hours. However, since the majority of patients reached the hospital after greater than 4 hours of chest pain, study of functional changes following late reperfusion was of great practical significance.

DESIGN NARRATIVE:

The study was a randomized trial of myocardial reperfusion in acute myocardial infarction by selective intracoronary infusion of nitroglycerin and/or intracoronary infusion of streptokinase. The trial was single-blinded as to the interventional therapy; it was double-blinded as to the drug infused. The primary endpoint was the ejection fraction on the 10th day of intervention. Patients were assigned to one of four treatment arms: an intracoronary infusion of streptokinase; an intracoronary infusion of nitroglycerin; combined infusions of nitroglycerin and streptokinase; a control group receiving conventional therapy without acute catheterization. All patients underwent anticoagulant therapy with intravenous heparin followed by warfarin for three months. Patients were followed for a minimum of two years.

The study completion date listed in this record was obtained from the Query/View/Report (QVR) System.

Being tested
nitroglycerin, streptokinase, heart catheterization
Medical subject headings
Cardiovascular Diseases, Coronary Disease, Heart Diseases, Myocardial Infarction, Myocardial Ischemia

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • nitroglycerinDrug

  • streptokinaseDrug

  • heart catheterizationProcedure or surgery

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted28 Oct 1999 (estimated)
  2. Study startAug 1982
  3. Study completionOct 1987

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomised
Masking
Double blind
IDs, dates and publications
ClinicalTrials.gov ID
NCT00000503
Sponsor's protocol ID
22
Other IDs
R01HL028843-05
Status last verified
Jan 2000
First submitted
27 Oct 1999
Last updated
26 Nov 2013
Results posted
No

Publications

  • Rentrop KP, Feit F, Sherman W, Stecy P, Hosat S, Cohen M, Rey M, Ambrose J, Nachamie M, Schwartz W, et al. Late thrombolytic therapy preserves left ventricular function in patients with collateralized total coronary occlusion: primary end point findings of the Second Mount Sinai-New York University Reperfusion Trial. J Am Coll Cardiol. 1989 Jul;14(1):58-64. doi: 10.1016/0735-1097(89)90054-5.

    PubMed 2500472
  • Zhan S, Wang J, Zhu M, Liu Y, Han F, Sun L, Wang Q, Huang Z. The Inhibitory Effects of NCT503 and Exogenous Serine on High-Selenium Induced Insulin Resistance in Mice. Nutrients. 2025 Jan 16;17(2):311. doi: 10.3390/nu17020311.

    PubMed 39861441

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing nitroglycerin, streptokinase and heart catheterization in people with Cardiovascular Diseases and Coronary Disease, run by National Heart, Lung, and Blood Institute (NHLBI).

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 26 Nov 2013. Status can change between updates, so confirm with the study contact before making plans.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00000503, which also lists 2 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 26 Nov 2013.

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