An electronic health record (EHR) is the systematized collection of patient and population electronically-stored health information in a digital format.
EHRs may includes a range of data, which include
Pateint demographics,
Medical history
Mmedication
Allergies
Immunization status.
Laboratory test results.
Radiology images
Vital signs.
Personal information like age and weight, and billing information.
EThese records can be shared across different health care settings. Records are shared through network-connected, enterprise-wide information systems or other information networks and exchanges.
Ref:
https://en.wikipedia.org/wiki/Electronic_health_record