Understanding the technology
About This Technology.
The EnSite X EP System is a 3D electroanatomic mapping system. During an electrophysiology study or ablation, it builds a model of the heart chamber on screen, shows the timing and strength of electrical signals in color, and tracks catheter positions live. Doctors use it to locate an arrhythmia's source, plan ablation points, and help reduce X-ray use.
What Is the EnSite X EP System?
An arrhythmia, or heart rhythm disorder, often starts from a small spot or a specific electrical pathway inside the heart. To treat it with ablation, your doctor needs to know where that source is. The EnSite X EP System is a 3D electroanatomic mapping system made by Abbott. It combines the shape of the heart chamber (anatomy) with its electrical activity in one map on screen during an electrophysiology study and catheter ablation.
How the System Builds a Map
Several adhesive electrode patches are placed on your chest and back. Using a combination of magnetic fields and electrical impedance measurements, the system tracks where the catheter tip is inside the heart. As the catheter touches the heart wall, the system collects many points and turns them into several types of map:
- Anatomical map. A 3D model of the heart chamber that can be rotated and viewed from any angle.
- Activation map. Colors show the order in which electrical signals spread, so the origin of an arrhythmia or its circuit can be identified.
- Voltage map. Colors show signal strength; areas with weak signals may indicate scar tissue.
- Ablation markers. Each ablated point is marked on the map, so your doctor can see the ablation line as it forms.
When 3D Mapping Is Used
3D mapping is mainly used for arrhythmias whose source is hard to trace with standard recordings, such as atrial fibrillation, atypical atrial flutter, atrial tachycardia, extra beats and tachycardia from the lower chambers, and repeat ablations. For some simple arrhythmias, your doctor may not need it. The level of detail also depends on the catheter used; mapping catheters such as HD Grid record many points at once.
What You Will Experience
Mapping is part of an electrophysiology study or ablation, so preparation, anesthesia, and recovery follow that procedure, as described on the Electrophysiology (EP) Laboratory page. You will not feel the mapping itself. You may only notice the patches on your skin and, at times, a racing heartbeat when the doctor triggers an arrhythmia to map it.
Limits and Your Doctor's Decision
The map is a guide, not a treatment. Its reliability depends on catheter contact with the heart wall, breathing movements, and whether the arrhythmia occurs during the procedure. X-ray may still be used at certain steps, for example when inserting the catheters. Your electrophysiologist decides whether 3D mapping is needed for your procedure.
Clinical use
Uses and Benefits.
Whether this technology suits your condition is decided by a doctor after an evaluation.
- Building a 3D model of the heart chambers during the procedure
- Locating the origin or circuit of an arrhythmia
- Mapping scar tissue that can give rise to ventricular tachycardia
- Guiding and marking ablation points, including in atrial fibrillation and atrial flutter
- Assessing earlier ablation lines during a repeat procedure
- Helping reduce X-ray use during the procedure
Benefits for the Doctor's Assessment
Seeing the Catheter Without Constant X-Ray
Catheter positions are shown on the 3D model, so your doctor does not have to rely on X-ray for every catheter movement.
Timing and Voltage Maps
The order in which signals spread and their strength are shown as colors on the heart model, helping your doctor tell the origin of an arrhythmia apart from scar tissue.
A Record of Every Ablation Point
Each ablation point is saved on the map, so your doctor can check whether an ablation line is complete or still has gaps.
One System for Many Arrhythmias
The same system is used for arrhythmias in the upper and lower chambers and works with several types of mapping catheter, including HD Grid.
Brief Technical Information
- Technology type
- 3D electroanatomic mapping system
- Manufacturer
- Abbott
- Catheter tracking
- Combined magnetic field and electrical impedance
- Radiation
- Mapping itself uses no X-ray; fluoroscopy may still be used at certain steps
- Used during
- Electrophysiology studies and catheter ablation
- Service location
- Electrophysiology (EP) Laboratory, Arrhythmia and Device Center
