Device interaction between cardiac contractility modulation (CCM) and subcutaneous defibrillator (S-ICD)

J Cardiovasc Electrophysiol. 2021 Nov;32(11):3095-3098. doi: 10.1111/jce.15198. Epub 2021 Sep 22.

Abstract

Combined implantation of cardiac contractility modulation (CCM) with subcutaneous implantable cardioverter-defibrillator (S-ICD) appears a suitable option to reduce the amount of intracardiac leads and complications for patients. Here we report on a patient with ischemic cardiomyopathy carrying an S-ICD in which a CCM device was implanted. During crosstalk testing post-CCM implantation, the S-ICD misannotated QRS complexes and T waves. The problem was solved through reprogramming the CCM, while preserving S-ICD functionality and improving heart failure symptoms. In conclusion, S-ICD combined with CCM seems to be a good and safe option for patients when device interference is being ruled out.

Keywords: CCM; S-ICD; T wave oversensing; crosstalk test; heart failure; interferences; noise.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Arrhythmias, Cardiac
  • Defibrillators
  • Defibrillators, Implantable*
  • Electrocardiography*
  • Humans
  • Myocardial Contraction
  • Treatment Outcome