Fig legends
Fig 1A: Stored electrograms of the treated episode in the VF zone. It
shows oversensing of noise dissociated from the native QRS.
Fig 1B: The lower 2 panels are continuous tracings from another recent
episode where the therapy got aborted as the noise amplitude became
below the RV lead sensitivity. The lowest panel also shows undersensing
and inadvertent RV pacing after the 2nd QRS complex.
The LOC could be true or functional.
Fig 2: Preoperative chest X ray showing lead beyond cardiac silhouette
suggestive of perforation