Inappropriate Shock Due to T-Wave Oversensing by a Subcutaneous ICD after Alcohol Septal Ablation for Hypertrophic Cardiomyopathy

Vincent F. Van Dijk*, Max Liebregts, Justin G. L. M. Luermans, Jippe C. Balt

*Corresponding author for this work

Research output: Contribution to journalEditorialAcademicpeer-review

4 Citations (Web of Science)


A 53-year-old female patient with hypertrophic obstructive cardiomyopathy (HOCM) was admitted for alcohol septal ablation (ASA). A subcutaneous internal cardioverter defibrillator (S-ICD) was implanted for primary prevention. After ASA, the patient developed a right bundle branch block, and the S-ICD delivered a total of five inappropriate shocks due to T-wave oversensing (TWOS). TWOS is a relatively frequent cause of inappropriate shocks in S-ICD patients. After invasive treatment for HOCM, there is a risk of developing intraventricular conduction delay and subsequent changes in QRS and T-wave morphology. This should be taken into consideration when ICD indication is evaluated in HOCM patients.
Original languageEnglish
Pages (from-to)307-309
JournalPacing and Clinical Electrophysiology
Issue number3
Publication statusPublished - Mar 2016


  • defibrillation - ICD
  • electrocardiogram
  • inappropriate shock

Cite this