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Cardiovascular DiseasesPhase 3NCT00000491

Aspirin-Myocardial Infarction Study (AMIS)

A Phase 3 study testing aspirin 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 determine whether the daily administration of 1 gm of aspirin to individuals with a documented myocardial infarction would result in a significant reduction in mortality over a three year period. Read more about this study

Who is it for?
Ages 30 to 69 years
What is being tested?
aspirin
How many people
Not given
Where
No sites listed yet
Study dates
Oct 1974to Aug 1979
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 30 to 69 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Men and women, ages 30 to 69. Had a documented myocardial infarction.

About this study

To determine whether the daily administration of 1 gm of aspirin to individuals with a documented myocardial infarction would result in a significant reduction in mortality over a three year period.

Read the detailed description

BACKGROUND:

It had been postulated that thrombosis plays a major role in the late stages of coronary artery occlusion. Platelet aggregation is a large component in the formation of arterial thrombi. Theoretically, an agent which prevents the aggregation of platelets would be of value in people with coronary artery disease. Aspirin, in small doses, inhibits platelet aggregation for prolonged periods of time, and therefore might be expected to prevent or retard the occlusion of coronary arteries. This would be reflected in a decrease in the incidence of myocardial infarction and a decrease in mortality due to coronary artery disease.

Several studies had given preliminary evidence that regular administration of aspirin may be of benefit to patients with known coronary artery disease. A National Heart and Lung Institute-sponsored study, the Coronary Drug Project, ran a pilot trial of aspirin and placebo in men with previous myocardial infarctions. Preliminary results from this trial demonstrated its feasibility and led NHLBI to sponsor a more definitive controlled study of the benefit of aspirin in the secondary prevention of coronary heart disease.

An Institute Planning Committee met four times between October 1974 and April 1975 and developed a protocol, manual of operations, and data collection forms. Recruitment of patients began in June 1975, with the first patient randomized on July 2, 1975. Patients who were randomized had been seen at the AMIS Clinical Center for two initial visits and one baseline visit and were free of any reasons for exclusion, such as the current use of anticoagulants and a history of adverse reactions to aspirin. Patients took acetaminophen at times when they would normally take aspirin.

Follow-up was for a minimum of 3 years, with each patient seen at 4-month intervals and monitored for side effects and various nonfatal events, including cardiovascular problems. The primary endpoint was mortality. Annually, a detailed history was obtained and a complete physical examination performed. The study involved 30 clinical centers, a coordinating center, and a central laboratory.

The study completed patient recruitment in the scheduled one year period. A total of 4,524 post-MI patients were enrolled by the 30 clinical centers. Three-year minimum patient follow-up ended in August 1979.

DESIGN NARRATIVE:

Randomized, double-blind, fixed sample. Eligible patients were assigned to a treatment group receiving 1 gm of aspirin daily (the equivalent of three standard aspirin tablets) or to a control group receiving a placebo.

Being tested
aspirin
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.

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 startOct 1974
  3. Study completionAug 1979

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
Prevention
Allocation
Randomised
Masking
Double blind
IDs, dates and publications
ClinicalTrials.gov ID
NCT00000491
Sponsor's protocol ID
10
Status last verified
Apr 2012
First submitted
27 Oct 1999
Last updated
25 Mar 2016
Results posted
No

Publications

  • Aspirin Myocardial Infarction Research Group: A Study of Aspirin in Patients with Myocardial Infarction. Prostaglandins in Hematology. Spectrum Publications Inc, New York, l977, 36l-370.

  • An intervention study-the aspirin myocardial infarction study. Lipids. 1977 Jan;12(1):59-63. doi: 10.1007/BF02532973.

    PubMed 319319

  • A randomized, controlled trial of aspirin in persons recovered from myocardial infarction. JAMA. 1980 Feb 15;243(7):661-9.

    PubMed 6985998

  • Aspirin Myocardial Infarction Research Group: Aspirin Myocardial Infarction Study: Design, Methods and Baseline Results. DHEW Pub. No. (NIH) 80-2l06, l980.

  • The aspirin myocardial infarction study: final results. The Aspirin Myocardial Infarction Study research group. Circulation. 1980 Dec;62(6 Pt 2):V79-84.

    PubMed 7438383

  • Wasserman AG, Bren GB, Ross AM, Richardson DW, Hutchinson RG, Rios JC. Prognostic implications of diagnostic Q waves after myocardial infarction. Circulation. 1982 Jun;65(7):1451-5. doi: 10.1161/01.cir.65.7.1451.

    PubMed 7042113

  • Goldstein S, Friedman L, Hutchinson R, Canner P, Romhilt D, Schlant R, Sobrino R, Verter J, Wasserman A. Timing, mechanism and clinical setting of witnessed deaths in postmyocardial infarction patients. J Am Coll Cardiol. 1984 May;3(5):1111-7. doi: 10.1016/s0735-1097(84)80167-9.

    PubMed 6423716

  • Mattson ME, Curb JD, McArdle R. Participation in a clinical trial: the patients' point of view. Control Clin Trials. 1985 Jun;6(2):156-67. doi: 10.1016/0197-2456(85)90121-7.

    PubMed 4006489

  • Shekelle RB, Gale M, Norusis M. Type A score (Jenkins Activity Survey) and risk of recurrent coronary heart disease in the aspirin myocardial infarction study. Am J Cardiol. 1985 Aug 1;56(4):221-5. doi: 10.1016/0002-9149(85)90838-0.

    PubMed 3895879

  • Frost PH, Verter J, Miller D. Serum lipids and lipoproteins after myocardial infarction: associations with cardiovascular mortality and experience in the Aspirin Myocardial Infarction Study. Am Heart J. 1987 Jun;113(6):1356-64. doi: 10.1016/0002-8703(87)90648-x.

    PubMed 3591604

  • Schoenberger JA. Recruitment experience in the Aspirin Myocardial Infarction Study. Control Clin Trials. 1987 Dec;8(4 Suppl):74S-78S. doi: 10.1016/0197-2456(87)90009-2.

    PubMed 3440392

  • Furberg CD, Friedman LM, MacMahon SW: Women as Participants in Trials of the Primary and Secondary Prevention of Cardiovascular Disease: Part II. Secondary Prevention: The Beta-Blocker Heart Attack Trial and the Aspirin Myocardial Infarction Study, in: Coronary Heart Disease in Women. ED Eaker, B Packard, NK Wenger, TB Carkson, HA Tyroler (Eds). New York, Haymarket Doyma, pp 241-246, 1987.

  • Howard J, Whittemore AS, Hoover JJ, Panos M. How blind was the patient blind in AMIS? Clin Pharmacol Ther. 1982 Nov;32(5):543-53. doi: 10.1038/clpt.1982.201.

    PubMed 7127995

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing aspirin 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 25 Mar 2016. 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 NCT00000491, which also lists 13 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 25 Mar 2016.

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