DETECTION AND DISPLAY OF IRREGULAR PERIODIC WAVEFORMS

• US 20160166165A1
• Filed: 12/16/2014
• Published: 06/16/2016
• Est. Priority Date: 12/16/2014
• Status: Active Grant

• Current Assignee: Biosense Webster Incorporated (Johnson & Johnson)
• Original Assignee: Biosense Webster Incorporated (Johnson & Johnson)
• Inventors: Govari, Assaf, Ephrath, Yaron
• Granted Patent: US 9,681,818 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2018/00351 Heart
• CPC Class Codes: A61B 2018/00642 with feedback, i.e. closed loop control
• CPC Class Codes: A61B 2018/00839 Bioelectrical parameters, e.g. ECG, EEG
• CPC Class Codes: A61B 5/287 Holders for multiple electrodes, e.g. electrode catheters for electrophysiological study [EPS]
• CPC Class Codes: A61B 5/316 Modalities, i.e. specific diagnostic methods
• CPC Class Codes: A61B 5/339 Displays specially adapted therefor
• CPC Class Codes: A61B 5/35 by template matching
• CPC Class Codes: A61B 5/352 Detecting R peaks, e.g. for synchronising diagnostic apparatus; Estimating R-R interval
• CPC Class Codes: A61B 5/361 Detecting fibrillation
• CPC Class Codes: A61B 5/366 Detecting abnormal QRS complex, e.g. widening
• CPC Class Codes: A61B 5/6852 Catheters
• CPC Class Codes: A61B 5/7475 User input or interface means, e.g. keyboard, pointing device, joystick
• CPC Class Codes: G06T 11/206 Drawing of charts or graphs
• CPC Class Codes: G06T 11/60 Editing figures and text; Combining figures or text
• CPC Class Codes: G06T 2210/41 Medical
• CPC Class Codes: G09G 2320/10 Special adaptations of display systems for operation with variable images
• CPC Class Codes: G09G 2340/12 Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
• CPC Class Codes: G09G 2340/14 Solving problems related to the presentation of information to be displayed
• CPC Class Codes: G09G 2380/08 Biomedical applications
• CPC Class Codes: G09G 5/00 : Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators image data processing or generation, in general G06T
• CPC Class Codes: G09G 5/10 : Intensity circuits
• CPC Class Codes: G09G 5/377 : for mixing or overlaying two or more graphic patterns G09G5/02, G09G5/397 take precedence
• CPC Class Codes: G16H 40/63 : for local operation

Abstract

A method for display, consisting of acquiring an electrical signal from a heart of a subject over multiple heart cycles. The electrical signal is partitioned into a succession of synchronized segments having respective start times at a selected annotation point in the heart cycles. The method includes overlaying respective graphical representations of the synchronized segments in the succession on a display screen, such that each segment is first presented on the display screen with an initial display intensity at a respective display time corresponding to a respective start time of the segment. The method further includes gradually decreasing a display intensity of each segment overlaid on the display screen as a decaying function of a time elapsed since the respective display time.

Claims

1. A method for display, comprising:

acquiring an electrical signal from a heart of a subject over multiple heart cycles;

partitioning the signal into a succession of synchronized segments having respective start times at a selected annotation point in the heart cycles;

overlaying respective graphical representations of the synchronized segments in the succession on a display screen, such that each segment is first presented on the display screen with an initial display intensity at a respective display time corresponding to a respective start time of the segment; and

gradually decreasing a display intensity of each segment overlaid on the display screen as a decaying function of a time elapsed since the respective display time.

2. The method according to claim 1, wherein overlaying the respective graphical representations comprises summing the display intensity of the synchronized segments at overlapping points of the synchronized segments.

3. The method according to claim 2, wherein summing the display intensity comprises summing the display intensity for a selected portion of the synchronized segments, and wherein the selected portion is smaller than the synchronized segments.

4. The method according to claim 1, wherein overlaying the respective graphical representations comprises summing the display intensity of the synchronized segments at points, of the synchronized segments, within a selected number of pixels of the display screen from each other.

5. The method according to claim 1, wherein the selected annotation point is derived from a QRS complex of the heart signal.

6. The method according to claim 1, wherein overlaying the respective graphical representations comprises aligning respective baselines of the synchronized segments.

7. The method according to claim 1, wherein overlaying the respective graphical representations comprises aligning the selected annotation point of each of the synchronized segments with one another.

8. Apparatus, comprising:

a display screen; and

a processor, which is configured to;

acquire an electrical signal from a heart of a subject over multiple heart cycles,

partition the signal into a succession of synchronized segments having respective start times at a selected annotation point in the heart cycles,

overlay respective graphical representations of the synchronized segments in the succession on the display screen, such that each segment is first presented on the display screen with an initial display intensity at a respective display time corresponding to a respective start time of the segment, and

gradually decrease a display intensity of each segment overlaid on the display screen as a decaying function of a time elapsed since the respective display time.

9. The apparatus according to claim 8, wherein overlaying the respective graphical representations comprises summing the display intensity of the synchronized segments at overlapping points of the synchronized segments.

10. The apparatus according to claim 9, wherein summing the display intensity comprises summing the display intensity for a selected portion of the synchronized segments, and wherein the selected portion is smaller than the synchronized segments.

11. The apparatus according to claim 8, wherein overlaying the respective graphical representations comprises summing the display intensity of the synchronized segments at points, of the synchronized segments, within a selected number of pixels of the display screen from each other.

12. The apparatus according to claim 8, wherein the selected annotation point is derived from a QRS complex of the heart signal.

13. The apparatus according to claim 8, wherein overlaying the respective graphical representations comprises aligning respective baselines of the synchronized segments.

14. The apparatus according to claim 8, wherein overlaying the respective graphical representations comprises aligning the selected annotation point of each of the synchronized segments with one another.