MAUDE Adverse Event Report: ZOLL MANUFACTURING CORPORATION LIFEVEST WCD 4000 SYSTEM; WEARABLE CARDIOVERTER DEFIBRILLATOR

Model Number WCD 4000

Device Problems Signal Artifact/Noise (1036); Over-Sensing (1438); Inappropriate/Inadequate Shock/Stimulation (1574)

Patient Problem Sudden Cardiac Death (2510)

Event Date 02/25/2018

Event Type  Death  

Manufacturer Narrative

Device evaluation of monitor sn (b)(4) and belt sn (b)(4) has been completed.The reported problem (patient death) was investigated.As received, the monitor and belt passed incoming functional testing.During the incoming functional testing, a 1hz simulated normal sinus rhythm signal was applied to the ecg electrodes, followed by a 5hz simulated treatable arrhythmia signal which verified proper performance of the detection algorithm.During the transition to the 5hz signal, the device was confirmed to properly enter into a treatment sequence which includes a verification of the tactile vibration alarm, audio messaging, and siren alarms, as well as a test of the pulse delivery circuitry.The pulse delivery circuitry test verified proper charging of the high voltage capacitors and proper delivery of five full energy 150j biphasic pulses.The functional testing confirmed proper response button functionality, ecg acquisition, detection algorithm performance, and pulse delivery functionality.

Event Description

A us distributor contacted zoll to report that a patient passed away at home while wearing the lifevest.The patient's son found the patient unresponsive on the floor with the device alerting to initiate cpr.The patient's son contacted ems.Review of the event indicates that the patient entered vf at 05:18:05 with varying amplitude.The device delivered one 150j shock at 05:19:01.The post-shock rhythm was asystole for 14 seconds with a spontaneous return of bradycardia at 30bpm.The patient remained in bradycardia until the rhythm transitioned to an idioventricular rhythm at 10bpm.The device subsequently delivered one 150j shock.The post-shock rhythms were asystole.The patient remained in asystole and the device delivered a final 150j shock.Oversensing of low-amplitude cardiac signal contributed to the detection.Asystole is considered a non-life sustaining rhythm.The device was shutdown at 07:48:03.

• Brand Name: LIFEVEST WCD 4000 SYSTEM
• Type of Device: WEARABLE CARDIOVERTER DEFIBRILLATOR
• Manufacturer (Section D): ZOLL MANUFACTURING CORPORATION; 121 gamma drive; pittsburgh PA 15238 3495
• Manufacturer (Section G): ZOLL MANUFACTURING CORPORATION; 121 gamma drive; pittsburgh PA 15238 3495
• Manufacturer Contact: katelynn mains ; 121 gamma drive; pittsburgh, PA 15238-3495 ; 4129683333
• MDR Report Key: 7370689
• MDR Text Key: 103519095
• Report Number: 3008642652-2018-02897
• Device Sequence Number: 1
• Product Code: MVK
• UDI-Device Identifier: 00855778005005
• UDI-Public: 00855778005005
• Combination Product (y/n): N
• Reporter Country Code: US
• PMA/PMN Number: P010030
• Number of Events Reported: 1
• Summary Report (Y/N): N
• Report Source: Manufacturer
• Source Type: distributor
• Reporter Occupation: Other
• Type of Report: Initial
• Report Date: 03/22/2018

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Date FDA Received: 03/26/2018
• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Device Operator: Lay User/Patient
• Device Model Number: WCD 4000
• Was Device Available for Evaluation?: Device Returned to Manufacturer
• Date Returned to Manufacturer: 03/12/2018
• Was the Report Sent to FDA?: No
• Date Manufacturer Received: 02/28/2018
• Was Device Evaluated by Manufacturer?: Yes
• Date Device Manufactured: 10/24/2012
• Is the Device Single Use?: No
• Is This a Reprocessed and Reused Single-Use Device?: No
• Type of Device Usage: Reuse
• Patient Sequence Number: 1
• Patient Outcome(s): Death