SOFA: Study on Omega-3 Fatty Acids and Ventricular Arrhythmia

Wageningen Centre for Food Sciences546 enrolled

Overview

The objective of the SOFA trial is to investigate whether supplemental intake of n-3 polyunsaturated fatty acids (n-3 PUFA) from fish oil can reduce the recurrence of life-threatening ventricular arrhythmias in patients with an implantable cardioverter defibrillator (ICD).

Previous human observational studies and clinical trials provide strong indications that n-3 PUFA from fish can prevent cardiovascular disease. Striking is that these studies show a strong relation between n-3 PUFA and sudden death, but not between n-3 PUFA and non-fatal heart disease. Sudden death is one of the most common and often the first manifestation of coronary heart disease. The majority of sudden deaths are directly caused by acute ventricular arrhythmia. Our hypothesis is that n-3 PUFA prevents sudden death by suppressing life-threatening cardiac arrhythmia. Therefore, we investigate in a randomized controlled clinical trial whether supplemental intake of n-3 PUFA from fish can reduce the incidence of life-threatening cardiac arrhythmias. Our population consists of patients with an implantable cardioverter defibrillator (ICD), because this device records all arrhythmic events in a memory chip. As the ICD enables continuous monitoring of events in nonhospitalised patients, this population is very suitable for testing a possible antiarrhythmic effect of n-3 PUFA. The objective of the SOFA trial is to investigate the effect of fish oil on the incidence of recurrent ventricular arrhythmia in patients with an ICD. The SOFA is a randomised, parallel, placebo-controlled, double-blind intervention study which is currently being carried out in 26 cardiology centers in Europe. Five hundred forty six patients with an ICD are randomised to receive either 2g/d of fish oil or placebo oil for a period up to 12 months. The primary outcome is spontaneous ventricular tachyarrhythmias as detected by the ICD or all-cause mortality within 12 months.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

DOUBLE

Enrollment

546

Conditions

Arrhythmia

Interventions

Supplementation with fish oil versus placeboPROCEDURE

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * ICD is capable of recording ECG strips for at least 10 of its (attempted) therapeutic interventions * 18 years or older * written informed consent Exclusion Criteria: * Primary prophylactic indication * ICD implantation as a 'bridge' to heart transplantation * Refractory supraventricular arrhythmias with rapid ventricular rates despite antiarrhythmic therapy * a projected lifespan of less than 1 year * participation in another trial (during or within 30 days before SOFA) * use of any supplemental n-3 fatty acid during the last 3 months * intake of more than 8g of n-3 fatty acids from fish per month as judged by a fish frequency questionnaire * pregnant women and women of childbearing potential who do not use adequate contraception * patients known to have a history of recent drug or alcohol abuse

Locations (27)

Wilhelminenspital

Vienna, Austria

Outcomes

Primary Outcomes

Occurrence of appropriate ICD intervention (shock or antitachycardia pacing) for spontaneous ventricular tachyarrhythmias, or all-cause mortality

Secondary Outcomes

All cause mortality (separately from ventricular tachyarrhythmia)

Cardiac mortality

Myocardial infarction

All arrhythmic events as documented by the ICD Core laboratory

Change in the prescription of antiarrhythmic drugs

Data from ClinicalTrials.gov

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