A system for determining signal quality of an electrophysiological signal measured at an acquisition time from an anatomical region using electrophysiology catheter , the system comprising: a signal quality processor configured to: receive as input information regarding proximal stability of the electrophysiology catheter relative to the anatomical region at the acquisition time, wherein the information regarding proximal stability comprises: information regarding a distance between the electrophysiology catheter and the anatomical surface at the acquisition time; and information regarding contact force between the electrophysiology catheter and the anatomical surface at the acquisition time; receive as input information regarding temporal stability of the electrophysiological signal; and compute a numerical signal quality score as a mathematical function of the information regarding proximal stability and the information regarding temporal stability; and a mapping processor configured to output a graphical representation of the numerical signal quality score, wherein the graphical representation of the numerical signal quality score comprises outputting a visual trace of the electrophysiology signal to a display using a color scale that corresponds to the computed numerical quality score. a signal quality processor configured to: receive as input information regarding proximal stability of the electrophysiology catheter relative to the anatomical region at the acquisition time, wherein the information regarding proximal stability comprises: information regarding a distance between the electrophysiology catheter and the anatomical surface at the acquisition time; and information regarding contact force between the electrophysiology catheter and the anatomical surface at the acquisition time; receive as input information regarding temporal stability of the electrophysiological signal; and compute a numerical signal quality score as a mathematical function of the information regarding proximal stability and the information regarding temporal stability; and receive as input information regarding proximal stability of the electrophysiology catheter relative to the anatomical region at the acquisition time, wherein the information regarding proximal stability comprises: information regarding a distance between the electrophysiology catheter and the anatomical surface at the acquisition time; and information regarding contact force between the electrophysiology catheter and the anatomical surface at the acquisition time; information regarding a distance between the electrophysiology catheter and the anatomical surface at the acquisition time; and information regarding contact force between the electrophysiology catheter and the anatomical surface at the acquisition time; receive as input information regarding temporal stability of the electrophysiological signal; and compute a numerical signal quality score as a mathematical function of the information regarding proximal stability and the information regarding temporal stability; and a mapping processor configured to output a graphical representation of the numerical signal quality score, wherein the graphical representation of the numerical signal quality score comprises outputting a visual trace of the electrophysiology signal to a display using a color scale that corresponds to the computed numerical quality score. <EOS>