Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2012 Dec 19;15(5):697–703. doi: 10.1093/europace/eus410

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author [2012]. Published by Oxford University Press on behalf of the European Society of Cardiology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc/3.0/), which permits non-commercial use, distribution, and reproduction in any medium, provided that the original authorship is properly and fully attributed; the Journal, Learned Society and Oxford University Press are attributed as the original place of publication with correct citation details given; if an article is subsequently reproduced or disseminated not in its entirety but only in part or as a derivative work this must be clearly indicated. For commercial re-use, please contact journals.permissions@oup.com.

PMC Copyright notice

Example of redundant messaging following ventricular lead fracture in patient with ICD implanted for secondary prevention. Top event notification flagged (red exclamation mark on yellow background) for out of range ventricular lead impedance. The lead impedance trend (below) had been stable, (black dots) but then suddenly increased during sleep (2.52 am) promptly triggering an event notification (red dot on trend). The patient was unaware of this critical device integrity failure which occurred 7 days after a normal conventional check at an office visit (marked FU 8/28/2007). The patient was called immediately the same day (FU 9/5/2007), and lead replacement scheduled. System continued to transmit daily in the interim – a total of 8 redundant messages were sent until problem resolution, i.e. lead replacement and defibrillation threshold testing (marked VF event notification) with return of impedance to normal range (9/15/2007). With a conventional ICD, the issue may have remained unidentified until next device check 1 year later, putting patient at risk, but in this case automatic remote monitoring enabled same-day physician evaluation.