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February 17, 2013

Mtg: High-Resolution Infrared Thermography to Analyze Thermal Profiles of RF Cardiac Ablation Catheter Technologies

by @ 5:22 pm. Filed under ALL, BioEngineering, Electronics Design

WEDNESDAY February 20, 2013
SCV Engineering in Medicine and Biology Chapter
Speaker: Leslie Oley, product strategy consultant
Time: Optional dinner at 5:15 PM, cafeteria; Presentation at 7:30 PM
Cost: none for presentation
Place: Optional dinner at Stanford Hospital cafeteria; meeting at Room M-114, Stanford University Medical School, Stanford
RSVP: not required

Radiofrequency Ablation (RF) Catheters are often used to treat certain cardiac arrhythmias, like atrial fibrillation, during minimally-invasive cardiac ablation procedures.? During these procedures, RF energy is applied to discreet areas in the cardiac tissue to form small scars (or “lesions”), rendering the tissue no longer electrically conductive and eliminating the arrhythmogenic electrical pathway in the heart.? ? The physics behind lesion creation with different RF ablation catheter technologies has not been fully characterized, and is suspected to have an important effect on procedural safety and patient outcomes.
This research used High Resolution Infrared (IR) Thermography to characterize the real-time thermal dynamics of several RF Catheter electrode designs in an in vitro model.? An IR camera (ThermoVision A20M) acquired real-time thermal images during lesion formation with the catheters.? Localized temperatures around the electrodes and at various locations in the myocardial tissue were tracked, analyzed and compared for the different catheter designs.? This novel IR Thermography method determined that different RF electrode configurations and cooling mechanisms generated significantly different thermal profiles, and suggested that certain design characteristics may optimize lesion formation and procedural safety.

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