Mapping density, it may be reasonable to hypothesize that increasing density from 80 to 500 points may be clinically ultra impactful. Multielectrode mapping catheters are mainly incorporated in the magnetically based mapping system.

Summary of Various Electrode Configurations, Sizes, and Relative Spacing With Commonly Used Catheters
Model Manufacturer Electrodes Tip Electrode Size, mm Ring Electrode Size, mm Spacing (Edge-to-Edge) Spacing Recorded
ThermoCool ST Biosense Webster 4 3.5 1 1/6/2002 3.25
ThermoCool SF Biosense Webster 4 3.5 1 2/5/2002 4.25
Navistar Biosense Webster 4 8-Apr 1 1/7/2004 3.5
CoolFlex St. Jude Medical 4 4 1 0.5-5-2 2.75
Safire/Cool Path St. Jude Medical 4 4 2 2/5/2002 5
FlexAbility St. Jude Medical 4 4 1 1/4/2001 3.5
Tacticath St. Jude Medical 4 3.5 1 2/5/2002 4.25
Blazer II/OI Boston Scientific 4 4 2 2.5-2.5-2.5 4.5
MiFi Boston Scientific 4 1 1.5 mm 2.5
PentaRay Biosense Webster 20 1 2/6/2002 3
Decapolar Biosense Webster 10 2.4 1 2/8/2002 3
Lasso Biosense Webster 20 1 2/6/2002 3
Duodecapolar (Livewire) St. Jude Medical 20 2 1 2/2/2002 3
IntellaMap Orion Boston Scientific 64 0.9×0.45 1.6 mm 2.5
Constellation (60mm) Boston Scientific 64 1.5 mm 5 6.5
Inquiry Optima St. Jude Medical 24 1 1-4.5-1
Inquiry AFocus II St. Jude Medical 20 1 4


  • Minimally-invasive heart disease & electrophysiology procedures using its new real-time 3D intracardiac echocardiography (ICE) catheter.
  • Real-time 3D/4D visualization of Left Atrial Appendage (LAA) with ICE ultrasound catheter.
  • Doppler imaging of blood flow and velocity, and myocardial wall motion. 
  • Four-way steering to 160°, for precise positioning and new views of the heart.

Presently Available Intracardiac Imaging Devices and Their Capabilities

Device Name Company Features
VeriSight Pro Philips’ ICE catheter  Philips’ ICE catheter VeriSight Pro uses the same ultrasound technology, miniaturized
to fit on the tip of a 3.0mm diameter (9 French) catheter so that it can be navigated to the patient’s heart via their vasculature – the same route used to introduce other catheters during minimally-invasive cardiac surgery. General anesthesia is typically not required, reducing patient risk, and opening up procedures to patients who are not good anesthesia candidates.
UltraICE® Boston Scientific 9 Fr non-steerable rotational motor driven Greyscale only system
AcuNav® Siemens, Biosense-Webster side-looking 64-element phased array 4 way steerability, 8 and 10 Fr. Greyscale, color Doppler, tissue Doppler, 3D localization with Cartosound
EP Med View Flex Catheter® St Jude Medical runs side-looking 64-element catheter on the Viewmate® scanner 10FR introducer, 2 way flex Color Doppler Grey scale, tissue Doppler 8-2MHz
ClearICE® St Jude Medical derived from the Hockey Stick, 64-element side-looking highly steerable 4 ways side
looking array with two sets of electrodes for integration of 3D localization with NavX®. Runs on the GE Vivid i scanner. Grey scale Tissue Doppler, Synchronization mapping 2D speckle tracking
SoundStar Catheter Biosense-Webster This is a new catheter, just now marketed as a 10Fr (3.33mm) device with integrated ultrasound array (like AcuNav), but with the CARTO magnetic sensor in the tip (this is now FDA approved (FDA 510(k) number is K070242, May 15, 2007.
Increase insight into the heart during transseptal punctures. The ACUSON
AcuNav™ Catheter provides high resolution 2D grayscale and Doppler models that help better understand structural orientation, visualize cardiac chamber borders and verify tissue contact. 
The ACUSON AcuNav™ Catheter is intended for intracardiac and intraluminal visualization of cardiac & great vessel anatomy and physiology as well as visualization of other devices in the heart. Adverse events related to cardiac catheterization have been documented. It shall be more clearly stated that ultrasound help mitigates the risk of complications but it does not avoid any. There is always a risk for the patient.