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Inappropriate implantable cardioverter defibrillator shocks-incidence, effect, and implications for driver licensing.


ABSTRACT:

Purpose

Patients with implantable cardioverter defibrillators (ICDs) have an ongoing risk of sudden incapacitation that may cause traffic accidents. However, there are limited data on the magnitude of this risk after inappropriate ICD therapies. We studied the rate of syncope associated with inappropriate ICD therapies to provide a scientific basis for formulating driving restrictions.

Methods

Inappropriate ICD therapy event data between 1997 and 2014 from 50 Japanese institutions were analyzed retrospectively. The annual risk of harm (RH) to others posed by a driver with an ICD was calculated for private driving habits. We used a commonly employed annual RH to others of 5 in 100,000 (0.005%) as an acceptable risk threshold.

Results

Of the 4089 patients, 772 inappropriate ICD therapies occurred in 417 patients (age 61 ± 15 years, 74% male, and 65% secondary prevention). Patients experiencing inappropriate therapies had a mean number of 1.8 ± 1.5 therapy episodes during a median follow-up period of 3.9 years. No significant differences were found in the age, sex, or number of inappropriate therapies between patients receiving ICDs for primary or secondary prevention. Only three patients (0.7%) experienced syncope associated with inappropriate therapies. The maximum annual RH to others after the first therapy in primary and secondary prevention patients was calculated to be 0.11 in 100,000 and 0.12 in 100,000, respectively.

Conclusions

We found that the annual RH from driving was far below the commonly cited acceptable risk threshold. Our data provide useful information to supplement current recommendations on driving restrictions in ICD patients with private driving habits.

SUBMITTER: Watanabe E 

PROVIDER: S-EPMC5543197 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature

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Inappropriate implantable cardioverter defibrillator shocks-incidence, effect, and implications for driver licensing.

Watanabe Eiichi E   Okajima Katsunori K   Shimane Akira A   Ozawa Tomoya T   Manaka Tetsuyuki T   Morishima Itsuro I   Asai Toru T   Takagi Masahiko M   Honda Toshihiro T   Kasai Atsunobu A   Fujii Eitaro E   Yamashiro Kohei K   Kohno Ritsuko R   Abe Haruhiko H   Noda Takashi T   Kurita Takashi T   Watanabe Shigeyuki S   Ohmori Hiroya H   Nitta Takashi T   Aizawa Yoshifusa Y   Kiyono Ken K   Okumura Ken K  

Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing 20170720 3


<h4>Purpose</h4>Patients with implantable cardioverter defibrillators (ICDs) have an ongoing risk of sudden incapacitation that may cause traffic accidents. However, there are limited data on the magnitude of this risk after inappropriate ICD therapies. We studied the rate of syncope associated with inappropriate ICD therapies to provide a scientific basis for formulating driving restrictions.<h4>Methods</h4>Inappropriate ICD therapy event data between 1997 and 2014 from 50 Japanese institutions  ...[more]

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