Patent ID: 9706937
Date: 2017-07-18
CPC Classifications: A61B

Claim:
1. A method of guiding a catheter medical procedure, comprising: providing a catheter, a plurality of body surface electrodes, and a display, wherein the catheter comprises a plurality of sensing electrodes, the sensing electrodes each being adapted to measure electrical activity; inserting the catheter into an atrium of a heart of a subject, and positioning said plurality of sensing electrodes at a plurality of respective positions in the atrium; detecting electrical activity in the atrium using the sensing electrodes over a time period, said detecting electrical activity comprising detecting local activation times (LAT) at a plurality of locations in the atrium; displaying a 4-dimensional LAT map on the display using electrical activity detected by said sensing electrodes in the atrium, the 4-dimensional LAT map comprising a 3-dimensional electroanatomic map which changes over the time period, the 4-dimensional LAT map being color-coded based on a color scale with different colors on the 4-dimensional LAT map indicating electrical activation at different respective times, and same colors on the 4-dimensional LAT map indicating concurrent electrical activation; attaching the plurality of body surface electrodes to the patient; detecting ventricular activity in the heart of the patient using the body surface electrodes during said time period, said ventricular activity comprising ventricular depolarization, the ventricular depolarization being identified by detecting at least one of a QRS complex and an R wave; displaying an icon on the display simultaneous to said displaying of the 4-dimensional LAT map, with the icon changing over the time period, with the icon displayed in an icon color according to said color scale during at least part of the time period, wherein the icon color when present is displayed in response to ventricular depolarization and corresponds to a ventricular depolarization time according to said color scale; and detecting both (i) ventricular depolarization and (ii) first electrical activity in the atrium at a first time point which is during said time period, and in response to said detecting of (i) ventricular depolarization and (ii) first electrical activity at the first time point simultaneously displaying both the icon and at least part of the 4-dimensional LAT map in a first color according to the color scale; wherein said simultaneous displaying of both the icon and at least part of the 4-dimensional LAT map in the first color indicates that said first electrical activity detected in the atrium potentially comprises a far-field signal from the ventricle.