Heart-starting devices show early promise for a new set of patients.

Devices small enough to fit in the palm of the hand — yet powerful enough to shock an ailing heart back to life — offer protection to hundreds of thousands of heart patients.

Preliminary research boosts hope that the benefits of the devices, implantable cardioverter-debrillators (ICDs), may extend life-saving support even to some patients without coronary artery disease or a heart attack. The news means potentially far more demand for ICDs, and more questions about living with them from an expanding number of patients. …

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