Identifying ambiguous cardiac signals for electrophysiologic mapping
First Claim
1. A system for use in monitoring cardiac signals comprising:
- an electrode apparatus comprising a plurality of electrodes configured to be located proximate tissue of a patient;
a display apparatus comprising a graphical user interface, wherein the graphical user interface is configured to present information for use in assisting a user;
computing apparatus coupled to the electrode apparatus and display apparatus, wherein the computing apparatus is configured to determine whether a signal acquired from the electrode apparatus is ambiguous, the computing apparatus configured to;
calculate a first derivative of the signal;
identify a first minimum value of the first derivative and a first time index associated therewith;
identify a second minimum value of the first derivative and a second time index associated therewith, within a time window that also includes the first minimum value;
calculate a ratio of the identified first and second minimum values of the first derivative;
calculate a difference between the first and second time indexes;
identify whether the signal is ambiguous or non-ambiguous based on the ratio and the difference between the first and second time indexes; and
display on the display apparatus an indication of the signal as ambiguous or non-ambiguous.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and associated method is disclosed for determining whether a signal is ambiguous. The system comprises a plurality of electrodes configured to be located proximate tissue of a patient. A display apparatus comprises a graphical user interface configured to present information to a user. A computing apparatus is coupled to the electrode apparatus. The computing apparatus is configured to calculate a first derivative of a signal acquired from the electrodes, determine a first minimum from the first derivative, determine a second minimum from the second derivative and a second index within a window, calculate a ratio of the first and second derivatives, calculate a difference between a first and second index. In response to determining the ratio and the difference between the first and second index, the display apparatus displays whether the signal is ambiguous.
155 Citations
20 Claims
-
1. A system for use in monitoring cardiac signals comprising:
-
an electrode apparatus comprising a plurality of electrodes configured to be located proximate tissue of a patient; a display apparatus comprising a graphical user interface, wherein the graphical user interface is configured to present information for use in assisting a user; computing apparatus coupled to the electrode apparatus and display apparatus, wherein the computing apparatus is configured to determine whether a signal acquired from the electrode apparatus is ambiguous, the computing apparatus configured to; calculate a first derivative of the signal; identify a first minimum value of the first derivative and a first time index associated therewith; identify a second minimum value of the first derivative and a second time index associated therewith, within a time window that also includes the first minimum value; calculate a ratio of the identified first and second minimum values of the first derivative; calculate a difference between the first and second time indexes; identify whether the signal is ambiguous or non-ambiguous based on the ratio and the difference between the first and second time indexes; and display on the display apparatus an indication of the signal as ambiguous or non-ambiguous. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for a multichannel mapping system comprising a processor connected to an electrode apparatus and a display apparatus, the electrode apparatus configured to be located proximate tissue of a patient, the method comprising:
-
acquiring a signal by the processor from the electrode apparatus; calculating a first derivative of the signal; determining minimum and maximum values of the first derivative; identifying first and second of the minimum values of the first derivative and their respective first and second time indexes within a time window; calculating a ratio of the identified first and second minimum values of the first derivative; calculating a difference between the first and second time indexes; identifying whether the signal is ambiguous or non-ambiguous based on the ratio and the difference between the first and second time indexes; and displaying on the display apparatus an indication of the signal as ambiguous or non-ambiguous. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification