Aspirin-Myocardial Infarction Study (AMIS)

This study has been completed.
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI) Identifier:
First received: October 27, 1999
Last updated: November 9, 2015
Last verified: April 2012
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.

Condition Intervention Phase
Cardiovascular Diseases
Coronary Disease
Heart Diseases
Myocardial Infarction
Myocardial Ischemia
Drug: aspirin
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Masking: Double-Blind
Primary Purpose: Prevention

Resource links provided by NLM:

Further study details as provided by National Heart, Lung, and Blood Institute (NHLBI):

Study Start Date: October 1974
Study Completion Date: August 1979
Detailed Description:


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.


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.


Ages Eligible for Study:   30 Years to 69 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Men and women, ages 30 to 69. Had a documented myocardial infarction.
  Contacts and Locations
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Please refer to this study by its identifier: NCT00000491

Sponsors and Collaborators
National Heart, Lung, and Blood Institute (NHLBI)
Investigator: Allan Barker Salt Lake Clinic Research Foundation
Investigator: David Berkson St. Joseph Hospital Health Center
Investigator: William Berstein Icahn School of Medicine at Mount Sinai
Investigator: Nemat Borhani University of California, Davis
Investigator: Elmer Cooper Santa Rosa Medical Center
Investigator: Leonard Dreifus Lankenau Hospital
Investigator: Noble Fowler University of Cincinnati
Investigator: Phillip Frost USPHS Hospital
Investigator: Mario Garcia-Palmieri University of Puerto Rico Medical Science Campus
Investigator: Hugh Gilmore University of Miami
Investigator: Sidney Goldstein Henry Ford Hospital
Investigator: Olga Haring Northwestern University
Investigator: J. Hoover University of Washington
Investigator: Richard Hutchinson University of Mississippi Medical Center
Investigator: William Krol University of Maryland at Baltimore
Investigator: Peter Kuo Rutgers Medical School
Investigator: Charles, Laubach Institute for Medical Education and Research
Investigator: Bernard Lewis Palo Alto Medical Research Foundation
Investigator: Jessie Marmorston University of Southern California
Investigator: J. McNamara Pacific Health Research Institute
Investigator: Dayton Miller U.S. Centers for Disease Control and Prevention
Investigator: Thaddeus Prout Greater Baltimore Medical Center
Investigator: David Richardson Virginia Commonwealth University
Investigator: Jorge Rios George Washington University
Investigator: Paul Samuel Long Island Jewish-Hillside Medical Center
Investigator: Stephen Scheidt Weill Medical College of Cornell University
Investigator: Robert Schlant Emory University
Investigator: Henry Schoch University of Michigan
Investigator: James Schoenberger Rush University Medical Center
Investigator: Marvin Segal Mount Sinai Hospital, New York
Investigator: Pantel Vokonas Boston Health and Hospitals Department
Investigator: C. Williams Ogden Research Foundation
Investigator: Gary Wilner NorthShore University HealthSystem Research Institute
  More Information

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.
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. Identifier: NCT00000491     History of Changes
Other Study ID Numbers: 10 
Study First Received: October 27, 1999
Last Updated: November 9, 2015
Health Authority: United States: Federal Government

Additional relevant MeSH terms:
Cardiovascular Diseases
Coronary Artery Disease
Coronary Disease
Myocardial Infarction
Myocardial Ischemia
Arterial Occlusive Diseases
Heart Diseases
Pathologic Processes
Vascular Diseases processed this record on February 04, 2016