Aspirin-Myocardial Infarction Study (AMIS)

Cardiovascular Diseases Clinical Trial

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00000491
• Other study ID #: 10
• Status: Completed
• Phase: Phase 3
• First received: October 27, 1999
• Last updated: March 24, 2016
• Start date: October 1974
• Est. completion date: August 1979

Study information

• Verified date: April 2012
• Source: National Heart, Lung, and Blood Institute (NHLBI)
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Federal Government
• Study type: Interventional

Clinical 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.

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 0
• Est. completion date: August 1979
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 30 Years to 69 Years
• Eligibility: Men and women, ages 30 to 69. Had a documented myocardial infarction.

Study Design

Allocation: Randomized, Masking: Double-Blind, Primary Purpose: Prevention

Related Conditions & MeSH terms

• Cardiovascular Diseases
• Coronary Artery Disease
• Coronary Disease
• Heart Diseases
• Infarction
• Myocardial Infarction
• Myocardial Ischemia

Intervention

Drug:
• aspirin

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
National Heart, Lung, and Blood Institute (NHLBI)

References & Publications (13)

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

An intervention study-the aspirin myocardial infarction study. Lipids. 1977 Jan;12(1):59-63. — View Citation

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.

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

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. — View Citation

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.

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. — View Citation

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. — View Citation

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. — View Citation

Schoenberger JA. Recruitment experience in the Aspirin Myocardial Infarction Study. Control Clin Trials. 1987 Dec;8(4 Suppl):74S-78S. — View Citation

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. — View Citation

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

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. — View Citation

* Note: There are 13 references in all — Click here to view all references