Minimal defibrillation thresholds and the correlation with implant position in subcutaneous implantable-defibrillator patients.
Action Potentials
Adult
Aged
Arrhythmias, Cardiac
/ diagnosis
Defibrillators, Implantable
Electric Countershock
/ adverse effects
Electrophysiologic Techniques, Cardiac
Female
Heart Rate
Humans
Male
Middle Aged
Prospective Studies
Prosthesis Design
Radiography, Thoracic
Time Factors
Treatment Outcome
conversion testing
defibrillation threshold testing
implant technique
induced arrhythmias
subcutaneous ICD
Journal
Journal of cardiovascular electrophysiology
ISSN: 1540-8167
Titre abrégé: J Cardiovasc Electrophysiol
Pays: United States
ID NLM: 9010756
Informations de publication
Date de publication:
11 2019
11 2019
Historique:
received:
02
05
2019
revised:
20
08
2019
accepted:
06
09
2019
pubmed:
13
9
2019
medline:
21
10
2020
entrez:
13
9
2019
Statut:
ppublish
Résumé
Since the introduction of the subcutaneous implantable-defibrillator (S-ICD) knowledge of factors elevating the defibrillation threshold (DFT), have increased. Optimal device positioning most likely results in a decrease in DFT. The PRAETORIAN score is a tool to systematically evaluate S-ICD implant position and predict conversion success by estimating the DFT on a chest X-ray. The objective of this study is to determine DFT in de novo S-ICD patients. De novo S-ICD patients were enrolled with DFT testing using a single 30 J shock or a prespecified step-down protocol. Chest X-rays were obtained and implant position was evaluated using the PRAETORIAN score. Fifteen patients, age 47 (±18) years and body mass index (BMI) 25(±3) kg/m DFT in S-ICD patients with optimal device positioning is lower than previously reported. Conversion testing using a low shock output reduced time to therapy by 6 seconds on average.
Sections du résumé
BACKGROUND
Since the introduction of the subcutaneous implantable-defibrillator (S-ICD) knowledge of factors elevating the defibrillation threshold (DFT), have increased. Optimal device positioning most likely results in a decrease in DFT. The PRAETORIAN score is a tool to systematically evaluate S-ICD implant position and predict conversion success by estimating the DFT on a chest X-ray. The objective of this study is to determine DFT in de novo S-ICD patients.
METHODS
De novo S-ICD patients were enrolled with DFT testing using a single 30 J shock or a prespecified step-down protocol. Chest X-rays were obtained and implant position was evaluated using the PRAETORIAN score.
RESULTS
Fifteen patients, age 47 (±18) years and body mass index (BMI) 25(±3) kg/m
CONCLUSION
DFT in S-ICD patients with optimal device positioning is lower than previously reported. Conversion testing using a low shock output reduced time to therapy by 6 seconds on average.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
2441-2447Informations de copyright
© 2019 Wiley Periodicals, Inc.