Please select the eligibility criteria that correspond to the clinical trial below.
Title: N/A
Brief Summary: The purpose of this study is to investigate whether fish oil supplements may reduce the frequency and duration of paroxysmal atrial fibrillation episodes.

Atrial fibrillation is a heart condition which effects a large percentage of the population .

Atrial fibrillation is a condition frequently experienced by people who have had pacemakers inserted .

Certain Pacemakers have sophisticated monitoring features that are able to recognise episodes of atrial fibrillation.

Fish oil supplements may be of benefit to patients with heart problems.Recent evidence suggests that fish oils may be beneficial to patients with rhythm disturbances.

By interrogating pacemakers this study will investigate the effect of fish oil supplements on the frequency and duration of episodes of atrial fibrillation.


Options:
A: Inclusion Criteria:

* Patients who have had at least 2 previous episodes of atrial fibrillation and an implanted pacemaker.

Exclusion Criteria:

* Patients with chronic atrial fibrillation
B: Inclusion Criteria:

* Both men and women
* Age \> 18 years
* Liver fat diagnosed on normal clinical grounds including in most cases liver assessed by Kleiner scoring system to classify severity, with no known aetiological factors for underlying liver disease (e.g. exclusion of hepatitis A, B \& C, primary biliary cirrhosis, autoimmune hepatitis, haemochromatosis). Last liver biopsy will be within 3 years of recruitment to the study.
* Liver fat diagnosed by ultrasound, CT or magnetic resonance imaging (MRI) in patients who also have either diabetes and/or features of the metabolic syndrome, without evidence of known aetiological factors for underlying liver disease (e.g. exclusion of hepatitis A, B \& C, primary biliary cirrhosis, autoimmune hepatitis, haemochromatosis).
* Alcohol consumption ≤ 14 units / week for women ≤ 21 units / week for men.

Exclusion Criteria:

* Alcohol consumption \> 15 units /week for women and \> 22 units /week for men.
* Decompensated acute or chronic liver disease.
* A history of viral hepatitis, diarrhoea, diverticulosis, irritable bowel syndrome, inflammatory bowel diseases, coeliac disease (seropositivity for anti-endomysial immunoglobulin A antibodies; immunoglobulin A (IgA) EMA).
* Previous bariatric or other abdominal surgery.
* Continuous use of antibiotics that may change gut microflora, probiotics, or antisecretory drugs capable of causing achlorhydria within the 2 months preceding enrolment, or evidence of immunoglobulin A or immunoglobulin deficiency (both of which produce confounding effects during assessments of intestinal permeability and small intestinal bacterial overgrowth).
C: Inclusion Criteria:

* Eligible participants had a total cholesterol level of ≧250mg/dL(6.5m mol/L) at baseline.
* Hyperlipidemic patients with serum total cholesterol of 250mg/dL or more. (Measurement of serum total cholesterol)
* Serum total cholesterol should be measured twice at interval of 2-4weeks. A single measurement is acceptable if the cholesterol is measured by blood collection at fasting under strict compliance with dietary advice after withdrawal of the antihyperlipemic drug.
* (Wash Out) The wash out period of 4weeks (8 weeks for probucol) is necessary in patients under treatment with antihyperlipemic drug. However, if treatment with the antihyperlipemic drug was started within 6 months of the initiation of the study, the patient can participate in the study without the washout period.

Exclusion Criteria:

* Acute myocardial infarction occurring within last 6 months
* Unstable angina pectoris
* A history or complication of serious heart disease(severe arrhythmia, heart failure, cardiac myopathy, valvular disease, congenital disease, etc.)
* Receiving cardiovascular reconstruction within last 6 months
* Cerebrovascular disorders occurring within last 6 months
* Complication of serious hepatic disease or renal disease
* Malignant tumor
* Uncontrollable diabetes
* Hyperlipidemia arising from the following disease: Nephrotic syndrome, hypothyroidism, Cushing's syndrome, secondary hyperlipidemia due to other disease
* Hyperlipidemia due to some drugs such as steroid hormone
* Hemorrhage(hemophilia, capillary fragility, gastrointestinal ulcer, urinary tract hemorrhage, hemoptysis, vitreous hemorrhage, etc.)
* Hemorrhagic diathesis
* Hypersensitivity to the study drug formulation
* Patients intending to undergo surgery
* Patients judged to be inappropriate by the physician in charge
D: Inclusion Criteria:

* 63 to 79 years old
* healthy men and women
* able to attend clinic at a study sites

Exclusion Criteria:

* illiteracy or inability to understand the protocol
* unable to undergo neurophysiological tests
* morbid obesity (BMI greater than or equal to ≥ 40 kg/m2)
* uncontrolled diabetes (HbA1c\>85)
* uncontrolled hypertension
* prior cerebrovascular accident
* any relevant psychiatric illness, including major depression
* advanced cognitive deterioration, dementia
* other neurodegenerative diseases (i.e. Parkinson's disease)
* any chronic illness expected to shorten survival (heart, liver, cancer, etc)
* bereavement in the first year of loss
* bad dentures unless fixable dental prostheses are used
* allergy to walnuts
* customary us of fish oil or flaxseed oil supplements
* eye related exclusion criteria

Answer: A