Patients with cryptogenic stroke	Class	References
Patients should initially undergo brain diffusion-weighted MRI imaging for the diagnosis of cryptogenic stroke.		204 , 205
AF is more likely to be detected after cryptogenic stroke with more intense investigation with longer and more sophisticated monitoring.		205–207
Long-term ECG monitoring techniques, such as trans-telephonic ECG monitoring or cardiac event recorders or ILR can increase yield of AF diagnosis after cryptogenic stroke in selected patients.		205 , 206
The use of an ILR should be considered for detecting AF in selected patients who are at higher risk of AF development, including the elderly, patients with cardiovascular risk factors or comorbidities.		80 , 207
TOE may lead to the reclassification of cryptogenic stroke because many cases are embolic and due to a cardiogenic source, mainly AF.		205 , 206