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Related Experiment Video

Updated: Jun 13, 2025

Electrophysiological Assessment of Murine Atria with High-Resolution Optical Mapping

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Published on: February 22, 2018

Visualization of Electrophysiologically Defined Superior Vena Cava-Right Atrium Junction With High-Resolution Mapping

Masahiro Ishikura¹, Yoshiaki Kawase¹, Taiji Miyake¹

¹Department of Cardiology, Gifu Heart Center, Gifu, Japan.

Journal of Cardiovascular Electrophysiology

|March 26, 2025

Summary

This summary is machine-generated.

High-resolution mapping with atrial extrastimulus pacing improves visualization of the superior vena cava-right atrium junction. This technique may enhance the effectiveness of superior vena cava isolation and sinus node localization.

Keywords:

ablation atrial fibrillation high‐resolution mapping superior vena cava superior vena cava isolation

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Ablation of Ischemic Ventricular Tachycardia Using a Multipolar Catheter and 3-dimensional Mapping System for High-density Electro-anatomical Reconstruction

Published on: January 31, 2019

Area of Science:

Electrophysiology
Cardiac Mapping
Atrial Arrhythmias

Background:

Diagonal conduction block lines at the superior vena cava (SVC)-right atrium (RA) junction are useful for SVC isolation (SVCI).
These block lines are not consistently observed, necessitating alternative isolation strategies.

Purpose of the Study:

To visualize the SVC-RA junction using high-resolution mapping with atrial extrastimulus pacing.
To compare visualization during sinus rhythm versus extrastimulus pacing.

Main Methods:

Twenty-five patients underwent high-resolution 3D mapping (CARTO 3).
Mapping was performed during sinus rhythm (Sinus map) and with atrial extrastimulus pacing (S2 map).
Slow conduction or block lines were assessed and compared between map types.

Main Results:

S2 mapping revealed significantly longer slow/block lines (52.5 mm) than Sinus mapping (35.6 mm).
A slow/block line covering over half the junction was seen in all patients during S2 mapping.
The sinus node was consistently located inferior to the visualized line.

Conclusions:

High-resolution mapping with atrial extrastimulus pacing enhances SVC-RA junction visualization.
This improved visualization may lead to more effective SVCI and sinus node localization.