+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Contribution of ethylenetetrafluoroethylene (ETFE) insulation to the electrical performance of Riata® silicone leads having externalized conductors



Contribution of ethylenetetrafluoroethylene (ETFE) insulation to the electrical performance of Riata® silicone leads having externalized conductors



Journal of Interventional Cardiac Electrophysiology 37(2): 141-145



The insulation of St. Jude Medical Riata® leads contains a polytetrafluoroethylene (PTFE) liner, silicone tubing, and ethylenetetrafluoroethylene (ETFE) coating on individual cable conductors. ETFE has sufficient dielectric strength to assure electrical function. This investigation intended to analyze performance of leads with and without externalized conductors and with intact and breached ETFE. Testing was performed on ETFE-coated conductors to determine their ability to deliver high-voltage therapy. Tests were performed on samples under different conditions and current leakage was measured. A high-voltage test and a cyclic pulse test were performed, and the effect of lead modifications on the potential gradient from a high-voltage shock was used to determine functionality. Measurements from modified Riata® leads were compared with a control lead with all insulation and conducting elements intact. Current leakage for all conditions tested, was within the acceptance criteria for the high-voltage test and the cyclic pulse test. In conductors that underwent cyclic testing, the highest value of current leakage was within the limit of acceptability for both phases of the test. Testing of leads with externalized conductors and breached ETFE showed similar potential gradients compared with a control lead. Testing of ETFE-coated conductors following multiple preconditioning steps showed that ETFE serves as a redundant layer of insulation. In the event that the ETFE coating is breached, the potential gradient seen resulting from a high-voltage defibrillation shock was similar to a lead with no breach to the ETFE, even after 100 shocks.

(PDF emailed within 0-6 h: $19.90)

Accession: 036823010

Download citation: RISBibTeXText

PMID: 23529220

DOI: 10.1007/s10840-013-9790-x


Related references

Prevalence of externalized conductors in Riata and Riata ST silicone leads: results from the prospective, multicenter Riata Lead Evaluation Study. Heart Rhythm 10(12): 1778-1782, 2014

Prevalence and presentation of externalized conductors and electrical abnormalities in Riata defibrillator leads after fluoroscopic screening: report from the Netherlands Heart Rhythm Association Device Advisory Committee. Circulation. Arrhythmia and Electrophysiology 5(6): 1059-1063, 2013

High prevalence of insulation failure with externalized cables in St. Jude Medical Riata family ICD leads: fluoroscopic grading scale and correlation to extracted leads. Heart Rhythm 9(8): 1218-1224, 2013

Failure of fluoroscopy to detect "inside-out" insulation failure and externalized conductors in a Riata ICD lead. Heart Rhythm 10(12): 1827-1828, 2014

Long-term Electrical Survival Analysis of Riata and Riata ST Silicone Leads—National VA Experience. 2012

Long-term electrical survival analysis of Riata and Riata ST silicone leads: National Veterans Affairs experience. Heart Rhythm 9(12): 1954-1961, 2013

Externalized conductors and insulation failure in Biotronik defibrillator leads: History repeating or a false alarm?. World Journal of Clinical Cases 5(2): 27-34, 2017

Externalized Conductor Cables in QuickSite Left Ventricular Pacing Lead and Riata Right Ventricular Lead in a Single Patient: A Common Problem With Silicone Insulation. Cardiology Research 3(5): 230-231, 2012

Fluoroscopic and electrical assessment of a series of defibrillation leads: prevalence of externalized conductors. Pacing and Clinical Electrophysiology 35(12): 1498-1504, 2013

Riata externalized conductors: cosmetic defect or manifestation of a more serious design flaw?. Heart Rhythm 9(8): 1225-1226, 2013

Longitudinal follow-up of externalized Riata leads. American Journal of Cardiology 112(10): 1616-1618, 2014

Lead thrombi associated with externalized cables on Riata ICD leads: a case series. Journal of Cardiovascular Electrophysiology 24(9): 1047-1050, 2014

Riata and Riata ST defibrillator leads failure: cable externalization is one problem, but other electrical failures seem more preoccupant. European Heart Journal 34(Suppl 1): P1396-P1396, 2013

Increasing lead burden correlates with externalized cables during systematic fluoroscopic screening of Riata leads. Journal of Interventional Cardiac Electrophysiology 37(1): 63-68, 2014

Insulation defects in Riata implantable cardioverter-defibrillator leads. Internal Medicine 51(19): 2689-2694, 2013