Techniques for data retention upon detection of an event in an implantable medical device

An implantable medical device comprising:

• a monitoring element configured to sense one or more signals associated with a plurality of neurological events;
• a memory component configured to store a plurality of data records in a data structure and replace some of the data records of the plurality of data records stored on the data structure as new data records of the plurality of data records are received in the memory component, the plurality of data records associated with the neurological events;
• and
• a processing component, the processing component configured to detect the neurological events, create a data record of each neurological event and store a plurality of the data records in the memory component, determine a priority index for the plurality of data records based on severity levels of the detected neurological events, and selectively replace an existing data record of the plurality of data records on the data structure with a newer data record having a higher priority index than the existing data record.

An implantable medical device comprising:

• means for sensing a neurological event;
• means for creating a data record of the neurological event;
• means for determining a severity level of the neurological event;
• means for storing the data record in a data structure containing a plurality of data records, the plurality of data records representing information about a plurality of neurological events;
• means for determining a priority index for the plurality of data records based on severity levels of the determined neurological events;
• and
• means for selectively replacing an existing data record in the data structure with a newer data record that has a higher priority index.