Cardiac Ablation Site Selection Using Reversible Pulsed Fields
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Solution Overview
Problem
Existing methods for determining treatment sites for cardiac arrhythmias, such as activation mapping and entrainment mapping, are time-consuming, require specialized equipment, and are limited in their ability to identify focal sources of arrhythmias, particularly in unstable or unmappable conditions.
Innovation Solution
The use of reversible pulsed field energy and reversible electroporation to deliver interrogating energy to potential treatment sites, measuring the electrical response to determine if irreversible therapy is needed, allowing for precise identification of arrhythmia-causing tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If activation mapping or entrainment mapping is used to determine treatment sites, then treatment sites can be identified, but the process becomes time-consuming and requires specialized equipment
Solution Approach 1:
The patent extracts the essential function of tissue characterization from complex mapping procedures by using simple electrical impedance measurements. Instead of performing full activation or entrainment mapping, the system takes out only the critical measurement component (impedance change detection) to identify treatment sites, thereby reducing procedure time while maintaining identification accuracy.
Solution Approach 2:
The patent replaces complex mechanical mapping systems with an electrical field-based approach. By using electrical impedance measurements rather than mechanical catheter manipulation or complex electrical mapping systems, the invention simplifies the procedure and reduces time requirements while still achieving accurate treatment site identification.
2Reliability
If traditional mapping methods are used, then some treatment sites can be identified, but focal sources of arrhythmias cannot be reliably identified in unstable or unmappable conditions
Solution Approach 1:
The patent enables the tissue itself to reveal its arrhythmia-generating properties through passive electrical impedance measurements. The tissue's inherent electrical characteristics change in response to the applied field, automatically indicating whether it is a focal source without requiring complex external mapping or stable arrhythmia conditions. This self-revealing property increases reliability across various arrhythmia types.
Solution Approach 2:
The patent changes the measurement parameter from complex electrical activity recording to simple electrical impedance measurement. This parameter change allows the system to detect tissue properties that indicate focal sources of arrhythmia regardless of arrhythmia stability, thereby improving reliability and expandability to unstable or unmappable conditions.
3Reliability
If point-by-point therapy is delivered to treat arrhythmias, then abnormal electrical signals can be blocked, but unnecessary tissue damage may occur
Solution Approach 1:
The patent performs preliminary electrical impedance measurements to identify which tissue points are actual focal sources of arrhythmia before delivering therapeutic energy. This preliminary characterization ensures that therapy is applied only to tissue that will benefit from treatment, preventing unnecessary damage to normal or non-contributing tissue while maintaining treatment effectiveness.
Solution Approach 2:
The patent applies different treatment approaches based on local tissue characteristics identified through impedance measurements. By characterizing each tissue point's electrical properties locally, the system determines whether a point is a focal source requiring therapy or normal tissue that should not be treated, thereby eliminating unnecessary tissue damage while maintaining arrhythmia treatment effectiveness.
Data Source
AI summary
Devices, systems, and methods for treating cardiac arrhythmia are disclosed herein. In some embodiments, devices, systems, and methods disclosed herein deliver interrogating energy to tissue at a position on a wall of an anatomical structure of a patient. If the devices, systems, and methods disclosed herein detect a change in electrical activity of the anatomical structure in response to the interrogating energy, the devices, systems, and methods disclosed herein can apply irreversible therapy to the tissue. In some embodiments, the change in electrical activity corresponds to slowing or termination of a detected arrhythmia.