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Coronary Artery Bypass and Nitrate Oral Supplementation (CABANOS)

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT01348971
First Posted: May 6, 2011
Last Update Posted: September 26, 2013
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Eddie Weitzberg, Karolinska Institutet
  Purpose
The purpose of this study is to determine whether oral sodium nitrate administration prior to coronary artery bypass surgery can reduce perioperative levels of troponin T. In addition, plasma and urine surrogate markers of renal, hepatic and brain injury will be monitored.

Condition Intervention Phase
Coronary Artery Disease Dietary Supplement: Sodium nitrate Other: Sodium chloride Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Basic Science
Official Title: Effects of Oral Nitrate During Coronary Artery Bypass Surgery

Resource links provided by NLM:


Further study details as provided by Eddie Weitzberg, Karolinska Institutet:

Primary Outcome Measures:
  • Troponin T release over the perioperative 72-hour period. [ Time Frame: 72 hours ]

Secondary Outcome Measures:
  • Troponin T release over the perioperative 24-hour period. [ Time Frame: 24 h ]
  • Creatinine kinase myocardial fraction (CKMB) release over the perioperative 72-hour period [ Time Frame: 72 hours ]
  • Creatinine kinase myocardial fraction (CKMB) release over the perioperative 24-hour period [ Time Frame: 24 hours ]
  • Pro Brain natriuretic peptide (proBNP) release over the perioperative 72-hour period. [ Time Frame: 72 hours ]
  • Aspartate aminotransferase (AST) release over the perioperative 72-hour period. [ Time Frame: 72 hours ]
  • Alaninaminotransferas (ALAT) release over the perioperative 72-hour period. [ Time Frame: 72 hours ]
  • Alkaline phosphatase (ALP) release over the perioperative 72-hour period. [ Time Frame: 72 hours ]
  • Bilirubin release over the perioperative 72-hour period [ Time Frame: 72 hours ]
  • Creatinine release over the perioperative 72-hour period [ Time Frame: 72 h ]
  • Cystatin C release over the perioperative 72-hour period [ Time Frame: 72 ]

Estimated Enrollment: 100
Study Start Date: March 2011
Study Completion Date: February 2013
Primary Completion Date: February 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Sodium nitrate
Preoperative oral administration of sodium nitrate. 700 mg the night before surgery and 700 mg three hours before surgery
Dietary Supplement: Sodium nitrate
Preoperative oral administration of sodium nitrate. 700 mg the night before surgery and 700 mg three hours before surgery
Placebo Comparator: Placebo
Preoperative oral administration of sodium chloride the night before surgery and three hours before surgery
Other: Sodium chloride
Preoperative oral administration of sodium chloride the night before surgery and three hours before surgery

Detailed Description:

Nitric oxide (NO) is an important mediator in the cardiovascular system and has been shown to have protective properties in ischemia-reperfusion injury. Inorganic nitrate, an oxidation product from endogenous NO production and also a constituent in green leafy vegetables, can be recycled, via nitrite, back to bioactive NO in the body. Recent research has shown beneficial effects of nitrate and nitrite in animal models of myocardial ischemia-reperfusion injury. Moreover, dietary nitrate reduces blood pressure and oxygen cost during exercise in humans.

During coronary bypass surgery the heart undergoes ischemia-reperfusion injury and troponin T is most often released from the myocardium. The aim of the present study is to investigate if preoperative inorganic nitrate, in doses easily achievable from the diet, can affect troponin T release as well as other surrogate markers of injury to the liver, kidneys and the brain. In addition, plasma and urine samples will be collected for markers of oxidative stress and inflammation (sCRP and cytokines). Patients planned for bypass surgery who give their written informed consent will, the night before surgery, get a standardized, low-nitrate meal where after they receive sodium nitrate on two occasions preoperatively; the night before and in the morning before surgery. Plasma and urine samples will be collected at various time points up to 72 hours after surgery.

  Eligibility

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Ages Eligible for Study:   18 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Patients undergoing coronary artery bypass surgery
  • Over 18 years of age

Exclusion Criteria:

  • Over 80 years of age
  • Pregnancy
  • Reoperation
  • Intended heart valve or additional surgery
  • Angina or troponin release above 45 nmol/L < 48 hours before surgery
  • Medication with organic nitrates/nitrites < 24 hours before surgery
  • Medication with glibenclamide or corticosteroids
  • Significant renal, pulmonary or hepatic disease
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01348971


Locations
Sweden
Karolinska University Hospital
Stockholm, Sweden, S-171 76
Sponsors and Collaborators
Karolinska Institutet
Investigators
Principal Investigator: Eddie T Weitzberg, MD,PhD Karolinska Institutet
  More Information

Responsible Party: Eddie Weitzberg, Professor, Karolinska Institutet
ClinicalTrials.gov Identifier: NCT01348971     History of Changes
Other Study ID Numbers: KI-101
First Submitted: May 4, 2011
First Posted: May 6, 2011
Last Update Posted: September 26, 2013
Last Verified: September 2013

Keywords provided by Eddie Weitzberg, Karolinska Institutet:
sodium nitrate
coronary artery bypass surgery
ischemia-reperfusion
myocardial injury

Additional relevant MeSH terms:
Coronary Artery Disease
Myocardial Ischemia
Coronary Disease
Heart Diseases
Cardiovascular Diseases
Arteriosclerosis
Arterial Occlusive Diseases
Vascular Diseases