FDA Adverse Event Injury Summary report: N

LIFEVEST WCD 4000 SYSTEM

MDR report key: 24742314 · Received March 31, 2026

Report

Report Number: 3008642652-2026-03097
Event Type: Injury
Date Received: March 31, 2026
Date of Event: March 19, 2026
Report Date: March 31, 2026
Manufacturer: ZOLL MANUFACTURING CORPORATION
Product Code: MVK
UDI-DI: 00855778005005
PMA / PMN Number: P010030
Adverse Event: Yes
Report Source: Manufacturer report
Reporter Location: PA, US
Reporter Occupation: OTHER

Narratives

Additional Manufacturer Narrative · 0

THE MONITOR AND ELECTRODE BELT HAVE NOT BEEN RETURNED FOR EVALUATION. BASED ON THE DATA AVAILABLE AT THIS TIME, THERE IS NO INDICATION OF A DEVICE MALFUNCTION CAUSING OR CONTRIBUTING TO THE INAPPROPRIATE TREATMENT. INAPPROPRIATE DEFIBRILLATIONS ARE AN ANTICIPATED RISK ASSOCIATED WITH THE USE OF THE LIFEVEST. PATIENTS ARE INSTRUCTED THROUGH ALARMS, VOICE MESSAGES, IFU, AND TRAINING TO PRESS THE RESPONSE BUTTONS TO PREVENT AN INAPPROPRIATE DEFIBRILLATION. THE CURRENT COMMERCIAL INAPPROPRIATE DEFIBRILLATION RATE IS CONSISTENT WITH THE OBSERVED RATE DURING THE PIVOTAL CLINICAL TRIAL G960083 (0.69% PER PATIENT-MONTH WITH 90% CONFIDENCE). A SUMMARY OF THE SAFETY AND EFFECTIVENESS DATA (SSED), INCLUDING THE INAPPROPRIATE DEFIBRILLATION SAFETY OBJECTIVE SUPPORTING FDA'S APPROVAL OF THE LIFEVEST, CAN BE FOUND AT HTTP://WWW.ACCESSDATA.FDA.GOV/CDRH_DOCS/PDF/P010030B.PDF.

Description of Event or Problem · 0

A PATIENT RECEIVED AN INAPPROPRIATE SHOCK. AF WITH RVR CONTRIBUTED TO THE FALSE DETECTION. THE RESPONSE BUTTONS WERE NOT PRESSED DURING THE EVENT. THE PATIENT CONTINUES WEARING LIFEVEST.

Devices

Seq	Brand	Generic	Product Code	Manufacturer	Model	Lot	UDI-DI
799463	LIFEVEST WCD 4000 SYSTEM	WEARABLE CARDIOVERTER DEFIBRILLATOR	MVK	ZOLL MANUFACTURING CORPORATION	LIFEVEST WCD 4000 SYSTEM		00855778005005

Patients

Seq	Age	Sex	Outcome	Treatment
1	NA	Unknown