System and method for processing electrophysiological signals

Method of amplifying an electrophysiological signal in a signal channel, the method comprising the steps of:

• receiving the electrophysiological signal as an analog signal;
• amplifying the electrophysiological signal during a diagnostic phase and signal with a gain according to a gain setting;
• converting the analog signal into a digital signal corresponding to the electrophysiological signal;
• monitoring the electrophysiological signal to obtain a magnitude of a DC component of the electrophysiological signal;
• controlling the gain setting of the adjustable gain element in response to:
• an increase of the magnitude of the DC component by activation of intracardiac ablation energy, and a decrease of the magnitude of the DC component by deactivation of the intracardiac ablation energy;
• and
• providing the digital signal as an output.

Electrophysiology system comprising:

• one or more signal channels, wherein at least one signal channel is configured to process an electrophysiological signal that includes intracardiac ablation energy, along a signal path extending from an input port configured to receive the electrophysiological signal as an analog signal, via at least one adjustable gain element configured to amplify the electrophysiological signal with a gain according to a gain setting, and via an analog-to-digital (ADC) element configured to convert the analog signal into a digital signal corresponding to the electrophysiological signal, to an output port configured to provide the digital signal as an output;
• a monitoring element configured to generate a monitoring signal representative of a magnitude of a DC component of the electrophysiological signal;
• and
• a gain control element configured to generate a control signal in response to the monitoring signal, wherein the control signal is configured to control the gain setting of the adjustable gain element so as to cause a decrease in gain responsive to an increase in the magnitude of the DC component caused by activation of the intracardiac ablation energy and/or an increase in gain responsive to a decrease in the magnitude of the DC component caused by deactivation of the intracardiac ablation energy.