Cardiology Research, ISSN 1923-2829 print, 1923-2837 online, Open Access
Article copyright, the authors; Journal compilation copyright, Cardiol Res and Elmer Press Inc
Journal website http://www.cardiologyres.org

Case Report

Volume 10, Number 2, April 2019, pages 128-130

Air Entrapment Causing Inappropriate Shock From a Subcutaneous Implantable Cardioverter Defibrillator

Figures

Figure 1.
Figure 1. The tracing shows oversensing of the S-ICD with subsequent inappropriate shock. Note the wandering baseline starting from 2 to 14 s. The oversensing was also noted at the same time of device’s inappropriate shock delivery. After the shock, sinus rhythm continued.
Figure 2.
Figure 2. Tracing of the air entrapment in the S-ICD pocket causing abnormal sensing (from 8 to 12 s) and wandering baseline pattern (from 4 to 27 s).
Figure 3.
Figure 3. The tracing after reprogramming the device to sense a different vector. Only QRS complexes were sensed without any T wave oversensing at baseline.
Figure 4.
Figure 4. Radiolucency below the sternum (arrows) represents a small area of air entrapment within the substernal subcutaneous pocket.