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Cocoa Flavanols in Renal Disease

This study has been completed.
Information provided by (Responsible Party):
Klinik für Kardiologie, Pneumologie und Angiologie, Heinrich-Heine University, Duesseldorf Identifier:
First received: August 5, 2011
Last updated: November 12, 2013
Last verified: November 2013

Purpose of the study is to characterize the potential acute and long-term improvement of dietary flavanols on vascular function in patients with end-stage renal disease (ESRD).

Patients will twice daily receive either a flavanol-poor or a flavanol-rich drink. In a double blind, placebo-controlled crossover study the safety, efficacy and acute beneficial effects of flavanol ingestion will be assessed in 10 patients with ESRD. In a 30 day long-term, double blind, placebo-controlled parallel study the chronic effects of dietary flavanols on vascular function in 52 patients with ESRD will be evaluated.

Condition Intervention Phase
End Stage Renal Disease
Endothelial Dysfunction
Other: Cocoa
Phase 1
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: The Impact of Dietary Flavanols on Cardiovascular Dysfunction in End-stage Renal Disease

Resource links provided by NLM:

Further study details as provided by Heinrich-Heine University, Duesseldorf:

Primary Outcome Measures:
  • The effect of flavanols on endothelial function as measured by flow-mediated dilation (FMD) after forearm ischemia and reperfusion. [ Time Frame: 30 days ]
    To study the effect of flavanols on flow mediated dilation of the brachial artery after 5 minutes of forearm ischemia and reperfusion in patients with ESRD

Enrollment: 22
Study Start Date: August 2011
Study Completion Date: December 2012
Primary Completion Date: December 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Flavanol rich cocoa Other: Cocoa
dissolved in water twice daily
Experimental: Flavanol poor Other: Cocoa
dissolved in water twice daily


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

Inclusion Criteria:

  • end stage renal disease
  • >18 years
  • chronic intermittent hemodialysis

Exclusion Criteria:

  • acute Infection
  • acute renal failure
  • heart failure (NYHA IV)
  • pregnancy
  • anuria
  Contacts and Locations
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Please refer to this study by its identifier: NCT01412320

Duesseldorf, NRW, Germany, 40225
Sponsors and Collaborators
Klinik für Kardiologie, Pneumologie und Angiologie
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Klinik für Kardiologie, Pneumologie und Angiologie, Christos Rammos, MD Clinic for Cardiology, Pneumology and Angiology, Heinrich-Heine University, Duesseldorf Identifier: NCT01412320     History of Changes
Other Study ID Numbers: ESRD_2010
Study First Received: August 5, 2011
Last Updated: November 12, 2013

Additional relevant MeSH terms:
Kidney Diseases
Kidney Failure, Chronic
Renal Insufficiency, Chronic
Urologic Diseases
Renal Insufficiency processed this record on May 24, 2017