Boston scientific received information that the patient implanted with this left ventricular (lv) lead complained of muscle stimulation and lack of sleep.The lead has been electrically repositioned several times with limited success.The lead was electrically deactivated but the patient¿s heart failure worsened so the lead was programmed back on.The associated device is pending replacement for normal battery depletion.At that time the lv lead will be upgraded.No additional adverse patient effects were reported.
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