It was reported that a pacing failure was observed on the his lead.The lead was explanted and replaced with an right ventricular (rv) lead.During the lead replacement procedure, the left ventricular (lv) lead exhibited a high, undefined pacing impedance when reconnected to the cardiac resynchronization therapy pacemaker (crt-p).It was suspected that there was a loose connection.An x-ray was taken, blood that had adhered to the lead was wiped out, and the crt-p was explanted and replaced.When the lv lead was connected to the new device, all measurements were normal.The lv lead remains in use.No patient complications have been reported as a result of this event.
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