Please select the eligibility criteria that correspond to the clinical trial below.
Title: Standard Medical Management in Secondary Prevention of Ischemic Stroke in China.
Brief Summary: The purposes of the study are to analyse the cross-section data of secondary stroke prevention in China and to carry out a standard medical management including medicine and interactive education program,and to evaluate the efficacy and safety of the standard medical management in secondary stroke prevention.


Options:
A: Inclusion criteria Patients with non-valvular atrial fibrillation (AF), at moderate to high risk of stroke, or systemic embolism with at least one additional risk factor (i.e. previous ischemic stroke, TIA, or systemic embolism, left ventricular dysfunction, age \>=75 years, age \>=65 with either diabetes mellitus, history of coronary artery disease or hypertension)

Exclusion criteria

1. Prosthetic heart valves requiring anticoagulation per se, or hemodynamically relevant valve disease that is expected to require surgical intervention during the course of the study
2. Severe, disabling stroke within the previous 6 months, or any stroke within the previous 14 days
3. Conditions associated with an increased risk of bleeding
4. Contraindication to warfarin treatment
5. Reversible causes of atrial fibrillation (e.g., cardiac surgery, pulmonary embolism, untreated hyperthyroidism).
6. Plan to perform a pulmonary vein ablation or surgery for cure of the AF
7. Severe renal impairment (estimated creatinine clearance \<=30 mL/min)
8. Active infective endocarditis
9. Active liver disease
10. Women who are pregnant, lactating, or of childbearing potential who refuse to use a medically acceptable form of contraception throughout the study
11. Anaemia (haemoglobin \<100g/L) or thrombocytopenia (platelet count \<100 x 109/L)
12. Patients who have developed transaminase elevations upon exposure to ximelagatran
13. Patients who have received an investigational drug in the past 30 days or are participating in another drug study
14. Patients considered unreliable by the investigator concerning the requirements for follow-up during the study and/or compliance with study drug administration, has a life expectancy less than the expected duration of the trial due to concomitant disease, or has any condition which in the opinion of the investigator, would not allow safe participation in the study (e.g., drug addiction, alcohol abuse)
15. Any known hypersensitivity to galactose if the warfarin used contains galactose.
B: Inclusion Criteria:

* Newly diagnosed atrial fibrillation

Exclusion Criteria:

* Age \< 18 years
* unwillingness to participate
C: Inclusion Criteria:

1. Ischemic cerebral infarction or TIA within 30 days.
2. Aged above 18 years old.
3. Hospitalized.
4. Cranial CT or MRI scan exclude intracranial hemorrhagic diseases
5. Stable clinical and neurological conditions.
6. A Modified Rankin score less than 4 at enrollment
7. Informed consent is obtained.

Exclusion Criteria:

Patients will be excluded from entry if any of the criteria listed below are met

1. Documented stroke caused by conditions other than atherosclerosis, ie, surgical or vascular intervention procedure.
2. Severe co-morbid or unstable medical condition, ie, heart failure, respiratory failure and renal failure, severe liver dysfunction, malignancy with likelihood of death within the next 2 years
3. Significant memory or behavioural disorder, ie, Alzheimer disease, etc, daily care needed.
4. A Modified Rankin score is more than 4
5. Concurrent participation in another clinical trial
6. Pregnant
7. Unable to give informed consent.
D: Inclusion Criteria:

* 21 years of age or older; male or female.
* Able to provide written informed consent.
* History of documented AF within the prior 12 months
* A moderate to high risk of stroke, as defined by CHADS2 index score of at least 2

Exclusion Criteria:

* Transient atrial fibrillation secondary to other reversible disorders
* Subjects with moderate or severe mitral stenosis, unresected atrial myxoma, or a mechanical heart valve
* Subjects with any contraindication for anticoagulant agents;
* Subjects with conditions associated with high risk of bleeding or have known or suspected hereditary or acquired bleeding disorders
* Females of childbearing potential including the following:

  * Females with a history of tubal-ligation
  * Females less than 2 years post-menopausal

Answer: C