A method for displaying patient ECG data on at least one display device, the method comprising: receiving, using an application program, ECG data including an ECG waveform from a database, wherein the application program and the database are comprised by a server system; receiving, using a data analyzer also comprised by the server system, analyzed ECG data including a detected arrhythmic event; generating using the application program, an indicia of the detected arrhythmic event; displaying, on the at least one display device, the indicia of the detected arrhythmic event in relation to the ECG waveform at a position associated with a time of the detected arrhythmic event; characterised in that the method further comprises: classifying, using the data analyzer, the patient into one of a plurality of patient groups based on at least a detected recency of the detected arrhythmic event, wherein the plurality of patient groups include at least a first group of patients that have experienced a recent arrhythmic event, and a second group of patients that have not experienced a recent arrhythmic event; generating group indicia associated with each of the plurality of patient groups, wherein each group indicia includes a visual indication of the detected recency of the detected arrhythmia event; and displaying, on the at least one display device, the group indicia associated with each of the plurality of patient groups. receiving, using an application program, ECG data including an ECG waveform from a database, wherein the application program and the database are comprised by a server system; receiving, using a data analyzer also comprised by the server system, analyzed ECG data including a detected arrhythmic event; generating using the application program, an indicia of the detected arrhythmic event; displaying, on the at least one display device, the indicia of the detected arrhythmic event in relation to the ECG waveform at a position associated with a time of the detected arrhythmic event; characterised in that the method further comprises: classifying, using the data analyzer, the patient into one of a plurality of patient groups based on at least a detected recency of the detected arrhythmic event, wherein the plurality of patient groups include at least a first group of patients that have experienced a recent arrhythmic event, and a second group of patients that have not experienced a recent arrhythmic event; generating group indicia associated with each of the plurality of patient groups, wherein each group indicia includes a visual indication of the detected recency of the detected arrhythmia event; and displaying, on the at least one display device, the group indicia associated with each of the plurality of patient groups. classifying, using the data analyzer, the patient into one of a plurality of patient groups based on at least a detected recency of the detected arrhythmic event, wherein the plurality of patient groups include at least a first group of patients that have experienced a recent arrhythmic event, and a second group of patients that have not experienced a recent arrhythmic event; generating group indicia associated with each of the plurality of patient groups, wherein each group indicia includes a visual indication of the detected recency of the detected arrhythmia event; and displaying, on the at least one display device, the group indicia associated with each of the plurality of patient groups.