An attempt was made to use a resolute onyx coronary drug eluting stent to treat a lesion in the 1st obtuse marginal.It was reported that after advancing the guide to the lesion it was not possible to advance the stent completely at the lesion.When attempting to remove it, the stent detached from the balloon and remains in the proximal left main (lm) - circumflex (cx) - 1st proximal obtuse marginal.It was stated that there is an imminent need to withdraw the stent.No further patient injury was reported.Although not reported by the account, the stent was noted to be expired at the time of the event.
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