1. Heterogeneous scar with functional block in ventricular tachycardia circuit: Visualization of moderate high-density mapping
- Author
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Keijiro Nakamura, Yasutake Toyoda, Sugi Kaoru, Masato Nakamura, Yoshinari Enomoto, and Naohiko Sahara
- Subjects
Wall thickness ,business.industry ,Heterogeneous scar ,medicine.medical_treatment ,High density ,Case Report ,Ventricular tachycardia ,Catheter ablation ,medicine.disease ,Activation pattern ,Visualization ,Functional block ,Dense scar ,medicine ,Voltage mapping ,Interelectrode spacing ,Sinus rhythm ,Cardiology and Cardiovascular Medicine ,business ,Biomedical engineering ,Block (data storage) - Abstract
In this paper, we propose a novel method of voltage-map reconstruction using the Advisor™ HD Grid (Abbott Laboratories, Abbott Park, IL) to elucidate the 3-dimensional anatomical and electrophysiological substrates. High-density mapping makes it possible to clarify the activation pattern during ventricular tachycardia and a substrate during sinus rhythm on the endocardial surface. To enhance the mapping resolution, the use of catheters with smaller electrodes and closer interelectrode spacing can be used.1 In contrast, the unipolar or bipolar with wider interelectrode can be a clue for estimating the substrate in 3 dimensions because of far-field potential sensing.2,3 In this case report, we describe the successful identification of a heterogeneous scar within a dense scar with the use of a reconstructed voltage map with wider interelectrode spacing and suggest the involvement of the heterogeneous scar in the mechanism of functional block. more...
- Published
- 2021
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