We are proposing a personal computer local network system for collecting data and managing of both cardiovascular in- and outpatients. The six PCs used as work stations are located in the following areas: reception desk, ergometry, holter, echocardiography, secretarial and coronary care unit and cardiology department. Starting from a commercially available DBMS program, an "Iceberg" applied program was first made in a single personal computer and then transferred to a local network. The tree-structured data base includes the cardiopathies list, the vasculopathies list, some cardiovascular clinical data and all information regarding cardiological instrumental tests. The data are descriptive, numeric, date, text and comment. The operative program allows us to change the data base without the help of the software house staff, so the system is adaptable to cardiological departments with different instrumental equipment and sections. The report of instrumental tests and the issuing of the discharge letter are made with the local work station, with simultaneous compiling, storing and printing. It is then possible, using any work station, to restore and print quickly a summary of all data concerning each patient. This summary permits us, in nearly all cases, to identify the patient's history and present condition, as well as the diagnostical steps taken.