The reported events of high pacing impedance and inadequate capture were not confirmed while the reported event of the guidewire failure to advance and remove was confirmed.As received, a complete lead was returned in one piece for analysis.Visual inspection, x-ray examination, and electrical testing did not find anomalies.The guidewire insertion test was performed and found the guidewire could not advance through the lead due to inner coil clogged with blood.The cause of the reported event the guidewire failure to advance and remove was isolated to the inner coil clogged with blood.
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