Smartwatch and External Holter Monitoring to Detect Atrial Fibrillation in Patients With Cryptogenic Stroke

The primary objective is to demonstrate that the protocol of ambulatory cardiac monitoring with wearable devices for 12 months allows detection of a higher percentage of occult AF than monitoring for 30 days. The secondary objectives will be to demonstrate the internal validity of smartwatches against insertable cardiac recorders for the detection of AF. To evaluate the usability and adherence to the use of smartwatches in patients with stroke. Detect predictors that can help detect long-term occult AF. Determine the profile of vascular events in each group. Detect predictors of vascular recurrence defined as stroke recurrence, incidence of cerebral hemorrhage, heart failure, myocardial infarction or vascular death.

Inclusion criteria

• Age greater to or equal to 55 years
• Patients with diagnosis of cryptogenic stroke after a basic study that included neuroimaging, extra/intracranial vascular evaluation, 24-hour monitoring, and echocardiogram
• Patients with acute cortical infarction with the presence of intracranial occlusion (preferably)
• Modified Rankin Scale (mRS) lower to 4

Exclusion criteria

• Diagnosis of lacunar infarction or transient ischemic attack (TIA)
• Diagnosis of stroke of known source: atherothrombotic due to moderate or severe symptomatic extra/intracranial stenosis, major cardioembolic cause (atrial fibrillation, anterior or apical ventricular akinesis, causal PFO, post-AMI, flutter or mitral stenosis), unusual cause (thrombophilia, arterial dissection symptomatic, toxic)
• Use of pacemakers
• Circumstances that may preclude the clinical follow-up or reduce the possibilities of obtaining data to achieve the objectives of the study and/or limit contact with the investigator (for example, transfer to a social health center)
• Unwillingness to the use of cardiac monitoring wearable devices
• Not understanding study procedures