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Fish Oil for Reduction of Atrial Fibrillation After Cardiac Surgery (FISH)

This study has been completed.
Information provided by:
University of Iowa Identifier:
First received: March 12, 2007
Last updated: May 10, 2010
Last verified: February 2007
The primary objective of this study is to determine if omega-3 polyunsaturated fatty acids reduce atrial fibrillation and other outcomes after cardiac surgery. In this placebo-controlled trial, patients undergoing elective coronary artery bypass graft surgery with or without valve repair will be treated with omega-3 polyunsaturated fatty acids perioperatively. The following hypotheses will be tested: 1. omega-3 polyunsaturated fatty acids reduces the incidence of atrial fibrillation (AF) after cardiac surgery, 2. omega-3 polyunsaturated fatty acids, administered in the perioperative period for cardiac surgery, decreases postoperative complication rates, and 3. omega-3 polyunsaturated fatty acids decrease intensive care unit and hospital length-of-stay.

Condition Intervention Phase
Atrial Fibrillation Drug: Omega Three Polyunsaturated fatty acids Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: Fish Oil to Inhibit Supraventricular Arrhythmias After Cardiac Surgery: The Fish Trial

Resource links provided by NLM:

Further study details as provided by University of Iowa:

Primary Outcome Measures:
  • The primary endpoint is the development of postoperative atrial fibrillation or flutter after bypass surgery. [ Time Frame: 14 days ]
    The primary outcome in this study is post-bypass atrial fibrillation documented by ECG or rhythm strip and requiring treatment.

Secondary Outcome Measures:
  • Time to post-operative atrial fibrillation. [ Time Frame: 14 days ]
    ICU and hospital lengths of stay, re-operation; bleeding, stroke, peri-operative myocardial infarction, re-hospitalization for any cardiovascular problem, Time to atrial fibrillation, Death.

Enrollment: 260
Study Start Date: February 2007
Study Completion Date: January 2010
Primary Completion Date: December 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: fish oil , corn oil
Highly purified pharmaceutical grade omega three polyunsaturated fatty acids
Drug: Omega Three Polyunsaturated fatty acids
2 grams orally twice daily pre-operatively and 2 grams oraly daily after until primary endpoint or 14 days.
Other Name: Lovaza, Omega three polyunsaturate ethyl esters

Detailed Description:

Atrial fibrillation is the most common complication after bypass surgery. It is a significant burden to the healthcare system because it is associated with increased hospital costs and a longer hospital length-of-stay. Atrial fibrillation occurring after bypass surgery is associated with increased morbidity and mortality. Atrial fibrillation is also associated with an increased risk for strokes, use of potentially harmful drugs, and the need for pacemaker therapy.

This study is for patients who are undergoing elective bypass surgery. Patients who meet study criteria and who consent to participate in the study will be randomized to treatment with omega-3 fatty acids or matching corn oil placebo, prior to surgery. After surgery, treatment will continue until the primary endpoint, atrial fibrillation, is reached, or 14 days, whichever is first.


Ages Eligible for Study:   18 Years to 85 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Age 18-85 years old.
  • Elective coronary CABG operation with or without concomitant valve surgery planned for at least 2 days after enrollment.
  • Signed, documented informed consent prior to admission to the study.

Exclusion Criteria:

  • Urgent or emergent bypass required to be performed <24 hrs after screening.
  • Unstable angina, requiring intervention or CABG <24 hrs after screening.
  • Decompensated congestive heart failure.
  • Chronic, persistent atrial fibrillation - patient in atrial fibrillation at the time of screening or enrollment or scheduled for a maze procedure or pulmonary vein isolation at the time of surgery.
  • Known sensitivity to Omacor (0mega-3 acid ethyl esters) and hypersensitivity to fish, fish products or corn oil.
  • Patients requiring warfarin or Lovenox the 2 days prior to bypass surgery.
  • Patients on Class I or III antiarrhythmic agents (quinidine, procainamide, disopyramide, flecainide, propafenone, moricizine, dofetilide, sotalol, amiodarone) or who have taken these drugs within 5 elimination half-lives of the drug (or within 2 months for amiodarone).
  • Patients who are pregnant or nursing.
  • Patients unable to provide/sign informed consent.
  • Patients currently enrolled in another clinical trial without a 30 day washout period.
  • Patients currently taking marine based omega-three fish oil supplements.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00446966

United States, Iowa
University of Iowa Hospitals and Clinics
Iowa City, Iowa, United States, 52246
Sponsors and Collaborators
University of Iowa
Study Chair: Chirag M Sandesara, MD Virginia Cardiovascular Associates
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Chirag M Sandesara, Virginia Cardiovascular Associates Identifier: NCT00446966     History of Changes
Other Study ID Numbers: 1733860001
Study First Received: March 12, 2007
Last Updated: May 10, 2010

Keywords provided by University of Iowa:
atrial fibrillation
coronary artery disease bypass graft surgery

Additional relevant MeSH terms:
Atrial Fibrillation
Arrhythmias, Cardiac
Heart Diseases
Cardiovascular Diseases
Pathologic Processes processed this record on June 23, 2017