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A man with an ischemic cardiomyopathy and chronic obstructive pulmonary disease underwent subcutaneous implantable cardioverter-defibrillator (S-ICD) placement under general anesthesia. Following induction of ventricular fibrillation (VF), defibrillation testing (65J) failed, requiring external rescue. Repeat shock testing with reversed polarity (65J) failed. A third shock and external defibrillation failed (80J and 200J), followed by a second external defibrillation (200J), which did not immediately terminate VF, and a device shock 2 seconds later (80J, successful). Repeat shock testing (80J) under conscious sedation without mechanical ventilation was successful. We discuss this case of failed defibrillation testing during S-ICD placement, potentially due to lung hyperinflation, requiring double sequential defibrillation.
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http://dx.doi.org/10.1016/j.cjca.2019.07.624 | DOI Listing |
Eur Heart J Case Rep
August 2025
Department of Cardiovascular Medicine, University of Oxford, Wellington Square, Oxford OX1 2JD, UK.
Background: Implantable cardioverter-defibrillators (ICDs) prevent sudden cardiac death due to ventricular arrhythmia. A novel extravascular ICD (EV-ICD) system provides improved functionality over previous transvenous (TV-ICD) and subcutaneous (S-ICD) alternatives, particularly in younger patients. This includes limited bradycardia pacing, anti-tachycardia pacing therapy, and lower energy defibrillation, all within a smaller device profile compared to the S-ICD.
View Article and Find Full Text PDFEur Heart J Case Rep
August 2025
Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, 6-1 Kishibeshimmachi, Suita, Osaka 564-8565, Japan.
Background: A subcutaneous implantable cardioverter defibrillator (S-ICD) is an alternative to a conventional transvenous implantable cardioverter defibrillator for preventing sudden cardiac death. Although posterior chest S-ICD implantation has been recommended for better defibrillation outcomes, little is known about the optimal S-ICD positioning for R-wave detection. Herein, we report two cases of S-ICD recipients in whom antero-inferior chest positioning improved R-wave detection after posterior chest positioning failed.
View Article and Find Full Text PDFJ Innov Card Rhythm Manag
July 2025
Department of Pediatrics, Division of Pediatric Cardiology, Indiana University School of Medicine, Indianapolis, IN, USA.
Hypertrophic cardiomyopathy (HCM) is an inherited disease present in 1 in 500 individuals and is the most common cause of sudden cardiac death in children. We present the case of a 17-year-old boy with HCM and a primary prevention subcutaneous implantable cardioverter-defibrillator (S-ICD) who developed left ventricular outflow tract obstruction and a myocardial bridge of the left anterior descending coronary artery. The patient underwent a septal myectomy/myotomy and muscular bridge unroofing.
View Article and Find Full Text PDFEuropace
February 2025
Institute of Cardiology, IRCCS Azienda Ospedaliero Universitaria di Bologna, Via Massarenti n. 9, Bologna 40138, Italy.
Aims: The subcutaneous implantable cardioverter defibrillator (S-ICD) is an alternative to traditional ICDs. The PRAETORIAN score, based on chest radiographs, has been validated to predict the probability of successful S-ICD defibrillation testing by assessing factors like fat thickness between the coil and sternum and generator placement. This study evaluated the correlation between the PRAETORIAN score and clinical characteristics, as well as implantation variables.
View Article and Find Full Text PDFEur Heart J Case Rep
August 2024
Institute for Diagnostic and Interventional Radiology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.
Background: Fibromas are rare primary benign cardiac tumours that can become symptomatic due to expansive growth, ventricular rhythm disturbances, and sudden cardiac death. Distinguishing fibromas from other (malign) cardiac masses is essential for accurate diagnosis and treatment. While there is some experience in management of cardiac fibromas in children, management of adult patients is unknown.
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