Detection of Epicardial Late Potentials by Endocardial Wide-Bipolar Mapping in a Case of Cardiac Sarcoidosis.

ABSTRACT:

Background

Identifying substrates for ventricular tachycardia (VT) from the endocardium is often difficult when the arrhythmia originates from the epicardium.

Case summary

A 72-year-old man with sustained VT and a left ventricular aneurysm due to cardiac sarcoidosis underwent left ventricular mapping using a high-density mapping catheter. With conventional omnipolar configuration, no low-voltage area or abnormal potentials were identified. However, reconstruction of the isochronal late activation map with wide-bipolar configuration revealed low-frequency late potentials within the aneurysm. Subsequent epicardial mapping demonstrated extensive late potentials on the contralateral side, and ablation at this site was successful in eliminating VT.

Discussion

Wide-bipolar

SUBMITTER: Kobayashi N 

PROVIDER: S-EPMC12859572 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature