A system for reporting cardiologic data includes a patient-portable monitoring device and circuitry. The monitoring device is configured to detect electrocardiogram (ECG) data and patient-initiated event data. The circuitry is configured to receive the ECG data and the patient-initiated event data； detect atrial fibrillation (AF) events in the ECG data； calculate the duration of each AF event by subtracting the respective start time from the respective stop time of each AF event； compare the duration of each AF event to a first duration threshold； store each AF event having a duration exceeding the first duration threshold； calculate a monitoring time period duration by subtracting the monitoring start time from the monitoring stop time； calculate, based on the stored AF events, AF burden； and output a graphical presentation of the patient-initiated event data, AF burden, and stored AF events. The first duration threshold is less than 30 seconds.
