PMC6339773_01
PMC6339773_02
Delivery of 40-joule shock despite resolution of inappropriate VF sensing prior to the committed nature of therapy. Note that due to shock delivery, vigorous ventricular contraction occurs that resumes the lead chattering inappropriate sensing as VF (from top to bottom: marker channel, RV shock electrogram, and RV sense electrogram).
CRIC2019-2810396.001.jpg
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fig1
The intracardiac electrogram recording was shown (Figure 1).
Intermittent nonphysiologic noise signals upon ICD interrogation (from top to bottom: marker channel, RV shock electrogram, and RV sense electrogram).
CRIC2019-2810396.002.jpg
PMC6339773_02_CRIC2019-2810396.002.jpg
fig2
CCM signal-delivering leads in the upper and middle septum (blue arrows) and single chamber ICD lead at RV apex (green arrow) chattering each other at tricuspid annulus (red arrow).
CRIC2019-2810396.003.jpg
PMC6339773_02_CRIC2019-2810396.003.jpg
fig3