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Aspirin in Patients With Myocardial Infarction and Thrombocytopenia
This study has been completed.
Sponsored by: M.D. Anderson Cancer Center
Information provided by: M.D. Anderson Cancer Center
ClinicalTrials.gov Identifier: NCT00501345
  Purpose

Primary Objective:

To determine the risk of bleeding from ASA therapy in thrombocytopenic patients who develop Acute Coronary Syndrome (ACS), and assess its effect on the overall morbidity and mortality in these patients as well as platelet functions.


Condition Intervention Phase
Thrombocytopenia
Myocardial Infarction
Drug: Aspirin
Phase III

MedlinePlus related topics: Cancer Heart Attack
Drug Information available for: Acetylsalicylic acid
U.S. FDA Resources
Study Type: Interventional
Study Design: Treatment, Non-Randomized, Open Label, Uncontrolled, Single Group Assignment, Efficacy Study
Official Title: Effects of Aspirin on Platelet Function and Clinical Outcome in Patients With Thrombocytopenia, Neoplasm, and Myocardial Infarction

Further study details as provided by M.D. Anderson Cancer Center:

Primary Outcome Measures:
  • To learn the benefits and risks of using aspirin in the treatment of heart attacks in patients with low platelet numbers. [ Time Frame: 8 Years ] [ Designated as safety issue: Yes ]

Enrollment: 30
Study Start Date: February 2002
Primary Completion Date: April 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
1: Active Comparator
Aspirin
Drug: Aspirin
325 mg PO On Day 1 Only, followed by 160 mg PO Daily

Detailed Description:

Aspirin is known to decrease death rate by as much as 50% in patients that suffer from heart attacks. Patients with low platelet count are not given aspirin for fear of an increased risk of bleeding. Researchers want to compare the risks versus the benefits of using aspirin in this patient population.

Participants in this study who suffer chest pain will be treated with a single enteric coated aspirin 325 mg instead of the current treatment without aspirin. Participants will then be tested to confirm that they had a heart attack by EKG (a test to measure the electrical activity of the heart) and blood tests (5ml of blood) will be drawn every 8 hours to detect enzymes that are released from the heart due to the heart attack. Blood samples will also be examined for platelet number.

Participants who are found to have had a heart attack and have a platelet count of between 100,000 and 20,000 will be continued on aspirin (160 mg per day). All other standard medications for heart attacks will also be given.

Participants who are found to have had a heart attack but whose platelet number is more than 100,000 will be given the standard therapy for heart attack, including enteric coated aspirin 325 mg per day, and will no longer take part in this study. Participants who are found to have had a heart attack but whose platelet number is less than 20,000 will be not be included in the study and will be treated as deemed appropriate by their primary physician.

Participants will be examined daily and evaluated for bleeding. Blood samples (30 ml of blood) will also be drawn before or after aspirin is given and 24 hours, 72 hours and 7 days after aspirin treatment to study platelet function. Participants will be followed up on the study for 7 days. Participants will be followed up in the cardiology clinic within 1-2 weeks after discharge from the hospital, then once a month for six month. Further follow up will be every 6 month. Patients are requested to follow up with cardiology by phone at any time for any bleeding.

Participants who are not found to have had a heart attack will not receive any further aspirin treatment.

This is an investigational study. Aspirin is an FDA approved drug for treatment of heart attacks and is commercially available. Aspirin is a standard therapy for patients who have had a heart attack. Thirty patients will take part in this study. All will be enrolled at M. D. Anderson.

  Eligibility

Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  1. Presenting for Cardiology consult at M.D. Anderson Cancer Center.
  2. Platelet count between 100,000 and 20,000.
  3. Acute Coronary Syndrome diagnosed with their first 12 lead EKG.
  4. Patients that continue to show evidence of MI by cardiac enzymes with CPK levels > 2 normal limits, CK-MB levels 10% above normal limits, and Troponin I levels > 1.4ug/L will be considered positive for MI.
  5. Ability to give consent.

Exclusion Criteria:

  1. Contraindications to aspirin including severe intolerance or true allergy, active bleeding, hemophilia, active retinal bleeding, severe untreated hypertension, active peptic ulcer, or other significant source of gastrointestinal or genitourinary bleeding, brain metastasis, and altered mental status.
  2. Unwillingness or inability to give consent.
  3. Progressive heart failure, unstable angina not responding to medical therapy for 24 hours, or ventricular tachycardia, necessitating thrombolysis, and angioplasty.
  4. Patients that rule out for MI by cardiac enzymes panel after the first 24 hours.
  5. Patients that rule in for MI and have Platelet count > 100,000.
  6. Patients with platelet count < 20,000.
  Contacts and Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00501345

Locations
United States, Texas
U.T.M.D. Anderson Cancer Center
Houston, Texas, United States, 77030
Sponsors and Collaborators
M.D. Anderson Cancer Center
Investigators
Principal Investigator: Jean-Bernard Durand, MD U.T.M.D. Anderson Cancer Center
  More Information

The University of Texas M.D.Anderson Cancer Center  This link exits the ClinicalTrials.gov site

Responsible Party: U.T.M.D. Anderson Cancer Center ( Jean-Bernard Durand, MD/Assistant Professor )
Study ID Numbers: ID01-674
Study First Received: July 13, 2007
Last Updated: December 30, 2008
ClinicalTrials.gov Identifier: NCT00501345  
Health Authority: United States: Institutional Review Board

Keywords provided by M.D. Anderson Cancer Center:
Thrombocytopenia
Platelet Function
Acute Coronary Syndrome
Myocardial Infarction
Heart Attack
Aspirin

Study placed in the following topic categories:
Heart Diseases
Hematologic Diseases
Myocardial Ischemia
Blood Platelet Disorders
Vascular Diseases
Ischemia
Thrombocytopathy
Necrosis
Thrombocytopenia
Aspirin
Acute Coronary Syndrome
Infarction
Myocardial Infarction

Additional relevant MeSH terms:
Anti-Inflammatory Agents
Molecular Mechanisms of Pharmacological Action
Cyclooxygenase Inhibitors
Hematologic Agents
Physiological Effects of Drugs
Enzyme Inhibitors
Fibrinolytic Agents
Cardiovascular Agents
Pharmacologic Actions
Fibrin Modulating Agents
Pathologic Processes
Analgesics, Non-Narcotic
Sensory System Agents
Therapeutic Uses
Platelet Aggregation Inhibitors
Cardiovascular Diseases
Anti-Inflammatory Agents, Non-Steroidal
Analgesics
Peripheral Nervous System Agents
Antirheumatic Agents
Central Nervous System Agents

ClinicalTrials.gov processed this record on January 16, 2009