| 摘要 |
<p>A cardiac mapping and pacing system includes a cardiac catheter having multiple electrodes and further includes an electrophysiological biological recorder. An interface system coupled between the multiple electrodes and the biological recorder permits the biological recorder to receive, process and display data acquired from the electrodes even though the number of electrodes may exceed the number of available inputs to the biological recorder. An application specific integrated circuit (ASIC) makes this possible. The ASIC comprises a cross-switch matrix which can be programmed via a digital interface. The digital interface, in combination with the ASIC, makes it possible to effectively interface a number of individual electrodes with a variety of existing and custom biological recorders. A signal source resident on-chip and ASIC permits automatic detection of open and shorted electrodes. Additional on-chip identification voltage sources permit automatic identification and verification of proper connections. External pacing pulses can be applied to the heart through the ASIC in retrograde fashion. An on-chip counter keeps track of the number of pulses thus detected. The switching function provided by the ASIC can be used to decouple, and, hence, avoid saturation of, the inputs of a biological recorder.</p> |
