■12 leads ECG cable for data collection and analysis simultaneously. QRS waveform can be distinguished by high precision. The cardiograph during sampling can be printedout on-line . ■Record and savewhole course cardiograph data simultaneously. ■The change of ST segment can be observed in the course of collection. The lead which the operator choses can be magnified, and the ST segment data can be calculated automatically . ■ Advanced original creation of screen waveform antijamming technology is adopted, which makes the screen waveform much more precise, the details of cardiograph much more extrude. ■ Anti-jamming technology is adopted to ensure the stabilization of the baseline, reducing effect on cardiograph from myoelectric jamming, baseline excursion, and industry electric wave jamming. ■ The machine can adopt both standard exercise scheme and user-defined exercise scheme, and set instantaneous printing and blood pressure measurement tip. ■Operator can mark events during exercising, the marked event cardiograph waveform can be compared with current waveform, the event can be observed, edited and printed. ■Be provided with several types of displaying and printing trend graph. Mainly includes: HR, BP, METS, HR*BP, exercise trend, ST segment level/influence/slope/3D/J level and ST/HR, etc. The provided types of trend graph include: line graph, column graph, trapezia graph and grid graph etc. ■The function of dynamic retrospect after exercising which can replay the whole exercise testing process is provided. During the course of replay, the speed can be adjusted, such as speedup, slowdown, pause and skip. ■With static review function, user can look up ECG waveform of any time, and modify the attribute of QRS complex. ■Powerful case management function is provided, including advanced search of archives , modify case info, delete archives, update archives etc. ■The function of "Import/Export Case" Is privided. The exported cases are compressed, which exhaust less disk space. The compressed cases are associated with the operation system file type. This design makes the import operation much more simple and quickly. ■The function of "System Settings" includes several setting items. For example, switching Chinese/English language, format and mode of displaying waveform (12 leads * 1screen / 6leads * 2screens / 3 leads * 2 screens / 3 leads * 1 screen, etc), the color of background grid and print setting, filter setting, and display optional parameters , etc. ■The system has friendly interface, multiple info can be preseted according to users’ operating habit, including : IME, tooltips, and doctors’ information. Latest setting will be memorized and autosaved as "Operator’s Favorite Settings". Then the settings can be recovered as start up next time. ■Several useful tools are provided, which are used for equipments management, cases history information management and some other operations. ■The wireless cardiograph data collection equipments improve the anti-jamming capability. And the system is compatible with the wired cardiograph data