DGM

DGM
Directed Graph Mapping

Solving heart problems one arrhythmia at a time

Learn more

Announcement

We are proud to announce that our team has created a first release of DGM. DGM is an intuitive software package that can analyze any cardiac arrhythmia by converting data into a directed network of excitation. Currently, DGM requires the local activation times (LAT) and the spatial coordinates of the measured electrodes. However, there is no requirement for any spatial organization of the electrodes, allowing the software to analyze clinical, experimental and computational data. DGM creates directed networks of the activation, which are analyzed with fast algorithms to search for reentry and focal sources. DGM has mainly been optimized to work with AT measured by CARTO (Biosense Webster) or RHYTHMIA (Boston Scientific), but can also analyze other arrhythmia. For more information, please read our novel manuscript or browse through the website.

Software paper

We are currently looking for EPs who are willing to test the software post-ablation on cases of atrial tachycardia measured by CARTO of RHYTHMIA.

We would like to test cases for which the following information is stored:

  1. Interpretation of the EP on the mechanism of the AT
  2. Order of ablation points
  3. Change of AT after a certain ablation line - new map in case the AT changed
  4. Detailed entrainment measurements
  5. Information on complexity of the case with current mapping system: very sure about mechanism of the AT - intermediate - too complex to interprete

Also, be aware that this is a closed beta testing phase, so it is likely that you will encounter bugs, or the software is not optimized for your workflow. We are therefore looking for research minded EPs in the first phase of testing, who are willing to contribute to the improvement of DGM.

Experimentalists and computer modelers are also welcome to test DGM. Again, we would appreciate that bugs are reported, and other relevant feedback is given.

Hope to hear from the cardiac community and please spread our website!
The DGM team
Enid Van Nieuwenhuyse - Sander Hendrickx - Robin Van den Abeele - Nele Vandersickel

electrophysiologist

DGM is being developed to retrospectively automatically analyze your clinical cases of atrial tachycardia (AT). One simple click to show where the AT is located (reentry or focal).

Our goal is to help EPs make better decisions on where to ablate. If you have any questions, would like to analyze a different type of clinical dataset or want to collaborate, do not hesitate to contact us.

We are always interested in obtaining data to further optimize our software

researcher

DGM is a versatile tool and can handle any type of electrode system. Have a look at our research page to find out which studies have already been realized with DGM. You can use DGM for clinical, experimental or in-silico data.

You can use the software in its current version for the analysis of your data, rendering both 2D and 3D simulations. Or we can help you with setting up the the software to analyze your own specific type of study.

mapping systems

Even though our current focus is towards research, we would still like to hear from you! As our final goal is to bring our research and software to the patient by embedding DGM into existing mapping systems, we are happy to show you our progress at any stage of the development.

Feel free to contact us with any questions.

News

October 15th 2021 · First closed beta release of DGM

We are proud to announce that our team has created a first release of DGM. DGM is an intuitive software package that can analyze any cardiac arrhythmia by converting data into a directed network of excitation. Currently, DGM requires the local activation times (LAT) and the spatial coordinates of the measured electrodes. However, there is no requirement for any spatial organization of the electrodes, allowing the software to analyze clinical, experimental and computational data. DGM creates directed networks of the activation, which are analyzed with fast algorithms to search for reentry and focal sources. DGM has mainly been optimized to work with AT measured by CARTO (Biosense Webster) or RHYTHMIA (Boston Scientific), but can also analyze other arrhythmia. For more information, please read our novel manuscript or browse through the website.

September 23-25th 2021 · Karlsruhe - Invited talk · Congres: Atrial Signals 2021

Title: Directed graph mapping -DGM- to analyze any cardiac arrhythmia

http://www.atrial-signals.kit.edu/

April 27th 2021 · Published article · Improving the management of cardiac arrhythmias

Cardiac arrhythmias are the leading cause of death in the Western world. The management of cardiac arrhythmias and related diseases currently accounts for about 9 per cent of the total healthcare expenditure across the European Union.

https://edition.pagesuite-professional.co.uk/html5/reader/...

April 15th 2021 · New paper on Directed Graph Mapping & Phase mapping

Directed graph mapping exceeds phase mapping in discriminating true and false rotors detected with a basket catheter in a complex in-silico excitation pattern.

https://www.sciencedirect.com/science/article/pii/S001048252100175X

April 1st 2021 · New paper on the evaluation of Directed Graph Mapping in Complex Atrial Tachycardias

DGM is a new tool - based on network theory - which can fully automatically detect the source of complex ATs and is able to compete with the latest mappings systems! Follow us for more applications with DGM!

https://www.sciencedirect.com/science/article/pii/S2405500X20313189

Features

Advanced user interface

Loops

Automatically show the reentry loops in the given arrhythmia. This reentry can be anatomical or functional

Focal sources

Automatically detect the focal sources in a given arrhythmia. These are regions with only outgoing arrows

Predefined input

Autoparsing for input files of several known mapping systems

Show ablation and PPI

Load data to add ablation or PPI points to your rendering

Create movies

Create movies of your rendering. One cycle or between two set timestamps

Post-processing

Files generated by DGM can easily be used to do your own post-processing, for example using Paraview

Loops
Loop band
Rendering of 2D simulated data
Movie of loop band

contact us

We'd like to hear from you! If you are interested in using DGM, in collaborating with us or want to provide us with valuable feedback, simply fill out the form below and we will contact you as soon as possible.