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Electrophysiology / RHYTHMIA™ Cardiac Mapping System / DIRECTSENSE™ Technology / Local Impedance

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A Localized Measure for Deeper Insights

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By providing a more localized impedance measurement, DIRECTSENSE™ Technology gives you deeper insights into tissue characteristics at the tip of your catheter, a better understanding of how your lesion may form and an unparalleled view into subsurface tissue heating.

How it Works | Localized Measure | Deeper Insights| Critical Feedback

Local Impedance Advantage

How DIRECTSENSE™ Technology Works

Generator impedance has long been a standard measurement during RF ablation procedures. DIRECTSENSE™ Technology builds on this principle by measuring local impedance only around the tip of the INTELLANAV MIFI™ Open Irrigated Ablation Catheter.

DIRECTSENSE™ Technology measures local impedance by sensing changes in an electric field generated from the catheter tip to the proximal ring electrode. The result is deeper, localized insights into what type of tissue you’re touching and how you’re influencing that tissue during ablation.

Local Impedance Advantage

Localized Measure

Obtain More Working Range1

With DIRECTSENSE™ Technology’s unique local impedance measurement, you receive approximately twice the working range of traditional generator impedance pre-ablation and around four times the range during ablation.
Bar chart showing DIRECTSENSE™ Technology’s unique local impedance measurement offers 2.2 times larger working range than generator impedance.
RHYTHMIA HDx™ high-definition cardiac map and DIRECTSENSE™ Technology interface.

Electrical Coupling Stability

 
Before delivering therapy, DIRECTSENSE™ Technology helps you understand your catheter proximity and stability to tissue through localized impedance readings.

Electrical Coupling Stability

 
Before delivering therapy, DIRECTSENSE™ Technology helps you understand your catheter proximity and stability to tissue through localized impedance readings.

Deeper Insights

Temperature and Local Impedance

Whether using standard or high-power ablation strategies, decreases in local impedance are highly correlated with temperature rise at and under the surface of the tissue (R=0.81).2
Chart showing the correlation between temperature and local impedance during RF ablation.
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Measuring Volumetric Changes

DIRECTSENSE™ Technology is able to detect and monitor local impedance changes up to 4mm deep in heart tissue, giving you unprecedented insights into subsurface tissue characteristics.
DIRECTSENSE™ Technology interface and INTELLANAV MIFI™ Open-Irrigated Ablation Catheter.

Critical Feedback

Resistive Load Insights

DIRECTSENSE™ Technology provides critical insights into the resistive load pre-ablation so you can better anticipate how your lesion may form.

Equation showing how critical insights into electrical coupling and tissue type help electrophysiologists better understand the resistive load pre-ablation.
Avoid Excessive Heating

Avoid Excessive Heating

Rapid and large decreases in local impedance may indicate a heightened risk for excessive heating and potential for steam pops.

Avoid Excessive Heating

Rapid and large decreases in local impedance may indicate a heightened risk for excessive heating and potential for steam pops.

Your Procedure. Your Endpoint. Your Tag.

AutoTag Software works with DIRECTSENSE™ Technology to help enable faster, more efficient characterization of lesion effectiveness during and post-ablation.

  • Customizable Drop Parameters and Coloring
  • Consistent Stability Measurement for Lesion Drop
  • Easier Tag Reprocessing
AutoTag Software interface showing customizable options during RF ablation procedures

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