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Trial record 1 of 1 for:    NCT00553774
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Effect of Cocoa Flavanols on Vascular Function (Cocoa)

This study has been completed.
University of California, Davis
Information provided by (Responsible Party):
Yerem Yeghiazarians, University of California, San Francisco Identifier:
First received: November 2, 2007
Last updated: October 25, 2016
Last verified: October 2016
Endothelial dysfunction is associated with a higher incidence of adverse cardiovascular events in patients with coronary artery disease (CAD). CAD patients also show impaired function and number of endothelial progenitor cells (EPCs, adult stem cells) which circulate in adult blood and contribute to endothelial repair. Clinical studies suggest that endothelial function can be improved in CAD patients by consumption of flavanol-rich cocoa. Yet, the mechanism is not known. It is also not known whether flavanol-rich cocoa provides an additive, positive effect in patients who are already receiving the maximal recommended therapies for risk factor modification. Therefore, the researchers propose to perform an investigator-initiated, randomized controlled cross-over study administering flavanol-rich cocoa or a placebo for two months in CAD patients on optimal medical therapy. An improvement of endothelial function as measured by flow-mediated dilation (FMD) will be the primary endpoint of this study. The researchers propose to also measure determinants of FMD such as microvascular response, inflammatory markers, metabolites of nitric oxide, as well as the number and function of EPCs in the blood. Importantly, detailed food questionnaires and plasma flavanols/metabolites will help to further support a causal link between flavanol-intake and improved vascular function.

Condition Intervention Phase
Coronary Artery Disease
Dietary Supplement: Cocoa Flavanols
Other: Placebo
Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double Blind (Participant, Investigator)
Primary Purpose: Supportive Care
Official Title: Effect of Cocoa Flavanols on Vascular Function in Optimally Treated Coronary Artery Disease Patients: Interaction Between Endothelial Progenitor Cells, Reactivity of Micro- and Macrocirculation

Resource links provided by NLM:

Further study details as provided by Yerem Yeghiazarians, University of California, San Francisco:

Primary Outcome Measures:
  • An improvement of endothelial function as measured by flow-mediated dilation (FMD) [ Time Frame: 1 month ]

Enrollment: 16
Study Start Date: March 2007
Study Completion Date: February 2008
Primary Completion Date: February 2008 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Flavanol
Cocoa Flavanol
Dietary Supplement: Cocoa Flavanols
Cocoa Flavanols (BD for 21 - 28 days)
Placebo Comparator: Placebo Other: Placebo
Placebo (BD 21 - 28 Days)


Ages Eligible for Study:   18 Years to 100 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • CAD patients over 18 years of age
  • Contact university for more details.

Exclusion Criteria:

  • Contact university for more details.
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Please refer to this study by its identifier: NCT00553774

United States, California
University of California
San Francisco, California, United States, 94143
Sponsors and Collaborators
University of California, San Francisco
University of California, Davis
Principal Investigator: Yerem Yeghiazarians, MD University of California, San Francisco
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Yerem Yeghiazarians, Proffessor of Clinical Medicine, University of California, San Francisco Identifier: NCT00553774     History of Changes
Other Study ID Numbers: CHR#H47369-28112
Study First Received: November 2, 2007
Last Updated: October 25, 2016

Keywords provided by Yerem Yeghiazarians, University of California, San Francisco:
CAD Patients on Optimal Treatment

Additional relevant MeSH terms:
Coronary Artery Disease
Myocardial Ischemia
Coronary Disease
Heart Diseases
Cardiovascular Diseases
Arterial Occlusive Diseases
Vascular Diseases processed this record on May 25, 2017