A method includes receiving, by a first computing system, a first package of electrocardiogram (ECG) data and metadata associated with the ECG data. The method further includes generating, by the first computing system, a report simulation page including strips of the ECG data and a summary of patient data based on the ECG data and the metadata. The method further includes displaying the report simulation page in a user interface (UI) and displaying a report build page in the UI. The report build page includes the ECG data and the metadata. The method further includes modifying the metadata in the report build page and automatically updating the report simulation page in response to the modifying the metadata.