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. <EOS>