Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

Understanding the Genetic Basis of Atherosclerosis and Peripheral Arterial Disease (GenePAD)

This study has been completed.
National Heart, Lung, and Blood Institute (NHLBI)
Information provided by (Responsible Party):
John P Cooke, MD, Stanford University Identifier:
First received: September 22, 2006
Last updated: May 27, 2015
Last verified: May 2015

September 22, 2006
May 27, 2015
April 2004
July 2008   (Final data collection date for primary outcome measure)
Identifying genetic variations that may cause inherited differences in plaque distribution [ Time Frame: Measured at participants' study visit ]
Not Provided
Complete list of historical versions of study NCT00380185 on Archive Site
Not Provided
Not Provided
Not Provided
Not Provided
Understanding the Genetic Basis of Atherosclerosis and Peripheral Arterial Disease
The Genetic Determinants of Peripheral Arterial Disease
Atherosclerosis, a condition in which fatty deposits build up along the inner walls of arteries, can occur throughout the body. The purpose of this study is to examine the possible genetic differences that may influence where atherosclerosis occurs.

Plaque build-up caused by atherosclerosis increases the risk of blood clots, heart attack, and stroke. Blockages of plaque can occur in different areas of the body. PAD, a circulatory disorder in which blockages occur in the peripheral arteries, is one manifestation of atherosclerosis. Individuals with PAD experience reduced blood flow to the legs, which may cause leg pain while walking. Coronary artery disease (CAD), in which plaque builds up in arteries leading to the heart, is another atherosclerosis-related condition. Individuals with PAD and CAD have similar atherosclerosis risk factors, but it remains unknown why some individuals develop one disease and not the other. Genetic differences may influence where atherosclerosis develops. The goal of the study is to identify genetic variations that may cause inherited differences in plaque distribution.

This study will enroll individuals with PAD who have been referred by their doctor for a coronary angiogram to confirm the presence of CAD. A control group composed of individuals who do not have PAD, but have similar risk factors for atherosclerosis, will also be enrolled. All participants will attend one study visit. They will undergo a coronary angiogram, a procedure in which a special dye is inserted intravenously into an artery of the heart. X-rays will be taken to document how blood flows through the artery. Questionnaires assessing quality of life, exercise habits, tobacco exposure, and family medical history will be completed. Participants will also undergo blood pressure measurements and blood collection for genetic analysis. Yearly follow-up phone calls will occur for 5 years to document any hospitalizations.

Observational Model: Case Control
Time Perspective: Prospective
Not Provided
Retention:   Samples With DNA
Serum, Plasma, White Cells
Non-Probability Sample
Subjects are recruited from individuals undergoing elective coronary angiography for suspected CAD at Stanford University or Mount Sinai Medical Centers.
Peripheral Vascular Diseases
Not Provided
  • 1
    Subjects with no hemodynamically significant disease (NHSD) of the coronary or peripheral arteries
  • 2
    Subjects with coronary artery disease only
  • 3
    Subjects with both coronary artery disease and peripheral arterial disease
Sadrzadeh Rafie AH, Stefanick ML, Sims ST, Phan T, Higgins M, Gabriel A, Assimes T, Narasimhan B, Nead KT, Myers J, Olin J, Cooke JP. Sex differences in the prevalence of peripheral artery disease in patients undergoing coronary catheterization. Vasc Med. 2010 Dec;15(6):443-50. doi: 10.1177/1358863X10388345.

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Not Provided
July 2008   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Hemodynamically significant PAD, as documented by an ankle-brachial index less than 0.9; control group participants will not have PAD
  • Received a referral for an elective coronary angiogram
  • Suspected CAD

Exclusion Criteria:

  • History of radiation treatment
  • History of organ transplant
  • History of viral diseases (i.e. HIV, hepatitis)
Sexes Eligible for Study: All
40 Years and older   (Adult, Senior)
Contact information is only displayed when the study is recruiting subjects
United States
R01HL075774 ( US NIH Grant/Contract Award Number )
Not Provided
Not Provided
Not Provided
John P Cooke, MD, Stanford University
Stanford University
National Heart, Lung, and Blood Institute (NHLBI)
Principal Investigator: John P. Cooke, MD, PhD Stanford University
Stanford University
May 2015

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP