Boston scientific v173 pacer s/n (b)(4) implanted on (b)(6) 2013 with normal lead function on prior check, had a fatal error, reverted to backup pacing.Patient presented w/ recurrent syncope, and acute pacemaker failure with intermittent failure to output requiring transcutaneous pacing and emergent generator change.We have seen two other patients with similar error messages in this model pacemaker all occurring within the last year of battery longevity, although these patients did not suffer syncope.Fda safety report id # (b)(4).
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