Keeping Oral o Parental AnticoaguLation in the Acute Phase of Cardioembolic Ischemic Stroke

Inclusion Criteria: * Ischemic stroke of less than 24 hours since beginning of symptoms or last seen normal * Mayor cardioembolic source (atrial fibrilation or flutter, mechanical heart valve prosthesis, recient miocardic infarction, rheumatic mitral valve stenosis, dilated cardiomyopathy, atrial myxoma, left ventricular focal akynesia. * Previous treatment with oral anticoagulants (vitamin K antagonists or direct oral anticoagulants), having received the last dose within the previous 24 hours. Treatment with intravenous or subcutaneos heparin is also valid. * Age \>18 years-old * Signed informed consent (by patient or representative) Exclusion Criteria: * History of Intracraneal or extracraneal haemorrhage that contraindicates anticoagulant therapy * Patients treated with intravenous thrombolysis as a reperfusion therapy * Intracraneal haemorrhage on initial CT scan * Health status with a short survival prevision * Patients in which a neurosurgery intervention could be indicated * Child-bearing woman or in breast-feeding period.