Please select the eligibility criteria that correspond to the clinical trial below.
Title: Prospective, Multi Centre, International Registry of Male and Female Patients Newly Diagnosed With Atrial Fibrillation.
Brief Summary: The Global Anticoagulant Registry in the FIELD-Atrial Fibrillation (GARFIELD-AF Registry) is a non-interventional, observational study that characterized a global population of non-valvular atrial fibrillation patients. The registry was used to document global baseline characteristics, current treatment strategies and outcome measures. Characterisation of a number of AF sub-populations was also completed. GARFIELD-AF is an independent academic research initiative sponsored by the Thrombosis Research Institute (London, UK) and supported by an unrestricted research grant from Bayer AG (Berlin, Germany).


Options:
A: Inclusion Criteria:

* 18 years or older
* Documented non valvular atrial fibrillation
* Able to provide informed consent
* Able and willing to complete the study questionnaires on own or with assistance

Exclusion Criteria:

* Referral is for atrioventricular node ablation or pulmonary vein isolation.
* Patients who have failed antiarrhythmic medications
* Patients with moderate to severe mitral or aortic valvular heart disease
* Clinically unstable atrial fibrillation
* Cannot or unwilling to attend follow-up appointments
B: Inclusion Criteria:

Prospective Cohort

* Written informed consent
* Age 18 years and older
* New diagnosis of non-valvular atrial fibrillation (diagnosed within the last 6 weeks) with at least one additional risk factor for stroke and regardless of therapy.

Retrospective validation cohort

* Written informed consent
* Age 18 years and older
* Diagnosis of non-valvular AF (diagnosed 6-24 months prior to enrolment) with at least one additional risk factor for stroke and regardless of therapy.

Exclusion criteria:

* No further follow-up envisaged or possible within enrolling hospital or with associated family practitioner.
* Patients with transient AF secondary to a reversible cause.
* Patients recruited in controlled clinical trials.
C: Inclusion Criteria:

1. Age over 18 years
2. Patients with comorbid non-valvular AF, defined on the basis of physician-assigned diagnoses during the hospitalization or as previously documented in the medical record, and additionally documented on an electrocardiogram or 24-h Holter monitor, if available.
3. Patients that receive OAC at hospital discharge or are eligible for OAC therapy (CHA2DS2-VASc score ≥1 for males and ≥2 for females).

Exclusion Criteria:

1. Patients unable to communicate via telephone for study interviewing
2. Patients with any medical disorder that would interfere with completion or evaluation of clinical study results
3. Patients that lived in assisted-care facilities or had terminal illness.
4. Presence of metallic valves or moderate-to-severe mitral stenosis

Anticoagulated patients on an intentionally short-term OAC prescription under physician's recommendations (i.e. lone recent AF episode) will be excluded.
D: Inclusion Criteria:

To be enrolled in this study, patients must:

1. have AF and/or a MHV;
2. be scheduled to receive warfarin indefinitely (operationally defined as 2 years);
3. be using warfarin according to the criteria described in the Coumadin package insert (no off-label uses);
4. be expected to survive for the duration of the study;
5. not be suffering from intracranial bleeding (intracranial hemorrhage, subarachnoid hemorrhage, hemorrhagic stroke) or any other contraindication described in the Coumadin package insert;
6. be willing to perform PST;
7. be willing to be randomized;
8. possess adequate cognitive and language skills to follow the protocol and all related instructions;
9. be willing to participate for the full duration of the study;
10. sign the informed consent form; and
11. not be enrolled in another randomized clinical trial that involves a drug or device intervention.

Exclusion Criteria:

Patients are excluded in this study if:

1. subject has had intracranial hemorrhage, subarachnoid hemorrhage, hemorrhagic stroke, or any other absolute/major contraindication described in the warfarin package insert within the last month
2. subject enrolled in another randomized clinical trial that involves a drug or device intervention
3. subject is not able to follow the protocol and all related instructions, and does not have a caregiver with these skills

Answer: B