A networkable kardiomonitor CM-3 is described as well as the associated central monitoring device CEMON. CM-3 allows archiving as well as efficient control of all relevant measurements, alarms and trend data in the last 2 years of use of the equipment. This data is easily reviewed, printed or saved on removable media to be included in the hospital patient documentation. The network is based on standard Ethernet bus architecture and PC Ethernet adapters. This high speed medium allows efficient real time control and immediate reaction to each alarm situation. Easy integration with other parts of the hospital information system is possible. In addition, critical monitor files can be efficiently backed up and possibilities are open for hierarchical storage with high security options.