Biosense Webster (israel) Ltd.

Biosense Webster, Inc.

Yaron Kadoshi

Natan Sharon Katz

Aharon Turgeman

Benjamin Cohen

Lior Zar

Elad Nakar

Eliyahu Ravuna

Refael Itah

Gal Hayam

Lior Botzer

Ziyad Zeidan

Tal Haim Bar-on

Yoav Benaroya

Michal Alroy Levy

Nuno Miguel Rocha Cortez-Diaz

Tal Haim Bar-On

Michal Alroy

A method includes assigning, to first voxels in a model of tissue of a chamber of a heart, respective first values of a parameter at respective locations on the tissue, the first voxels representing the locations, respectively. Some of the locations are on an endocardial surface of the tissue, and others of the locations are on an epicardial surface of the tissue. The method further includes assigning respective second values to second voxels in the model, a subset of which represent a portion of the tissue between the endocardial surface and the epicardial surface, by interpolating the first values. Other embodiments are also described.

Volumetric LAT map

A method includes receiving a bipolar signal sensed by a pair of electrodes at a location in a heart of a patient. One or more electrocardiogram (ECG) signals are received, sensed by body-surface electrodes attached to the patient. Two or more successive QRS complexes are identified in the bipolar signal. One or more activations are detected in the bipolar signal, which occur within a window-of-interest that begins at least a given time with respect to the identified QRS complexes. The detected activations are checked whether they are late potentials, by verifying whether (i) the activations do not coincide with a predefined event observed in the ECG signals, and (ii) the activations are repeatable in the successive QRS complexes. In response to deciding that at least one of the detected activations is a late potential, the latest of the at least one of the late potentials is visualized to a user.

Annotation of late potentials comprising local abnormal ventricular activation (LAVA) signals

Methods, apparatus, and systems for medical procedures are disclosed herein and include detecting points of an intra-cardiac area that exhibits abnormal activations, such as local abnormal ventricular activations (LAVAs). Points that exhibit such abnormal activations may be referred to as seed points that are identified during a first step of the process disclosed herein. The seed points may be identified using one or more inputs such as unipolar and bipolar mapping channels, body surface ECGs, past activations, neighboring points and the like during the first step which prioritizes high specificity over sensitivity. During a second step which prioritizes high sensitivity, electrical activations of neighboring points near the seed points are analyzed to determine if the activations are similar (e.g., have a similar time) as the abnormal activations corresponding to the corresponding seed points.

Method and apparatus to find abnormal activations in intra-cardiac electrocardiograms based on specificity and sensitivity

A method for mapping atrial fibrillation (AF) in a heart, the method includes receiving an electrogram (EGM) signal, which is acquired at a given position in the heart, and is exhibiting the AF. Two or more primary peaks are identified in the EGM signal, and a cycle length (CL) is calculated between adjacent primary peaks. One or more secondary peaks are identified in the EGM signal within the CL. A local fragmentation index (FI) that is indicative of a number of the secondary peaks per CL, is calculated. The local FI is visualized on a map of at least part of the heart.

Mapping atrial fibrillation using fragmentation index

Growing community of inventors

Hosha'aya, Israel

Yaron Kadoshi