Irregular heart rhythms are a common and dangerous problem for people at risk for sudden cardiac arrest. For several decades, miniature electronic devices called implantable cardioverter-defibrillators (ICDs) that detect and correct potentially deadly fast, irregular beats in the heart’s lower chambers have been a lifesaver for people prone to these episodes. Two recent advances in ICD technology are making these devices even safer and more effective to a wider range of people.
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