METHOD AND SYSTEM FOR IDENTIFYING POTENTIAL ATRIAL FLUTTER AREAS FOR MEDICAL DECISION SUPPORT

摘要

A decision support computer system (100), computer implemented method, and computer program product for supporting diagnostic analysis of atrial flutter types. The system includes an interface component (110) to receive an electrical reference signal (RS) generated by a reference sensor (CSCS). The reference signal (RS) provides a time reference for electrical activity of one or more atria of a patient wherein the time interval between two subsequent electrical activities is referred to as basic cycle length (BCL). The interface further receives a plurality of electrical signals (P1 to Pi) generated by one or more further sensors (S1 to Sn) wherein the plurality of electrical signals (P1 to Pi) relate to a plurality of locations in the one or more atria. The plurality of locations comprising locations different from the location of the reference sensor (CSCS). A signal analyzer component (120) of the system determines, for each signal of at least a subset of the received signals originating from locations within a selected area of the one or more atria, an active interval when electrical activity occurs, and a resting interval when no electrical activity occurs. Based on the determined intervals, a subset cycle length coverage is computed as the ratio of duration of activity (DoA) and the basic cycle length (BCL) wherein the duration of activity includes the active intervals for the entire subset of signals. A visualizer component (130) of the system indicates the selected area as an area including a potential focal source if the subset cycle length coverage is smaller than a predefined ratio. Else it indicates the selected area as an area including a potential re-entry.