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Understanding ICDs – Implantable Cardioverter Defibrillator

Heart & Blood Health | Last Active: Feb 6, 2019 | Replies (12)
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@johnbishop

My daughter who has long QT syndrome had a S-ICD implanted but finally had to have it removed and have a pacemaker implanted in it's place. She was constantly getting shocked by the S-ICD due to what she describes as false readings.

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Replies to "My daughter who has long QT syndrome had a S-ICD implanted but finally had to have..."
Kanaaz Pereira, Connect Moderator | @kanaazpereira | Feb 5, 2019

Hi @johnbishop,

A reported drawback of subcutaneous implantable cardioverter defibrillators or S-ICD is the potential for generating false positives, or inappropriate shocks. Apparently, this is because of "positional attenuation of the R waves that may activate the device algorithm to increase the amplitude of the cardiac signals, resulting in oversensing of atrial fibrillation waves.”

I thought you might be interested in viewing this article about some advancements in the newer devices.
"S-ICD Sensing Filter At Least Halved Inappropriate Shocks” https://www.medpagetoday.com/meetingcoverage/hrs/72853

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