Trial Search Results

Angiotensin Converting Enzyme (ACE) Inhibition and Cardiac Allograft Vasculopathy

Cardiac transplantation is the ultimate treatment option for patients with end stage heart failure.

Cardiac allograft vasculopathy remains a leading cause of morbidity and mortality after transplantation.

Angiotensin converting enzyme inhibitors are used in less than one half of transplant recipients. Preliminary data suggest that angiotensin converting enzyme inhibitors retard the atherosclerotic plaque development that is the hallmark of cardiac allograft vasculopathy. Moreover, this class of drug appears to increase circulating endothelial progenitor cell number and has anti-inflammatory properties, both of which improve endothelial dysfunction, the key precursor to the development of cardiac allograft vasculopathy.

The objective of this project is to investigate the role of an angiotensin converting enzyme inhibitor, ramipril, in preventing the development of cardiac allograft vasculopathy. During the first month after cardiac transplantation subjects will undergo coronary angiography with intravascular ultrasound measurements of plaque volume in the left anterior descending coronary artery. Using a coronary pressure wire, epicardial artery and microvascular physiology will be assessed. Finally, endothelial function and mediators of endothelial function, including circulating endothelial progenitor cells, will be measured. Subjects will then be randomized in a double blind fashion to either ramipril or placebo. After 1 year, the above assessment will be repeated. The primary endpoint will be the development of cardiac allograft vasculopathy based on intravascular ultrasound-derived parameters. The second aim will be to assess the effect of ramipril on endothelial dysfunction early after transplantation. The final aim is to determine the impact of ramipril on coronary physiology early after transplantation.

Stanford is currently not accepting patients for this trial.

Lead Sponsor:

Stanford University

Collaborator: VA Palo Alto Health Care System

Stanford Investigator(s):


  • Drug: ramipril
  • Drug: Placebo




Inclusion Criteria:

   - Heart transplant recipient within the first month of transplant;

   - 12 years of age or older;

   - Must have a serum creatinine less than 2.0 mg/dl;

   - Will provide written informed consent;

   - Female patients of childbearing potential must have negative pregnancy test;

   - For pediatric patient, parent(s) will provide consent and the child will sign assent.

Exclusion Criteria:

   - Less than 12 years of age;

   - Have more than one solid organ transplant at time of heart transplant;

   - Has serum creatinine greater than 2.0 mg/dl;

   - Pregnancy.

Ages Eligible for Study

12 Years - N/A

Genders Eligible for Study


Not currently accepting new patients for this trial

Contact Information

Stanford University
School of Medicine
300 Pasteur Drive
Stanford, CA 94305
William Fearon