
The benefits of implantable cardioverter-defibrillators (ICDs) have been shown in randomized clinical trials. The factors that affect the risk–benefit ratio in a community setting, however, have not been evaluated.

The benefits of implantable cardioverter-defibrillators (ICDs) have been shown in randomized clinical trials. The factors that affect the risk–benefit ratio in a community setting, however, have not been evaluated.