Patients suspected of stroke by a prehospital provider will have a headset placed to record their headpulse during the encounter. These measurements will be used to assess the accuracy of the device at predicting the presence of large vessel occlusion (LVO) stroke. The MindRhythm, Inc., Harmony® 5000 device is intended to be used in the pre-hospital setting by medical professionals to diagnose large vessel occlusion stroke in adults suspected of having a stroke.