FDA Adverse Event Injury Summary report: N

LIFEVEST WCD 4000 SYSTEM

MDR report key: 23905090 · Received December 29, 2025

Report

Report Number: 3008642652-2025-12396
Event Type: Injury
Date Received: December 29, 2025
Date of Event: December 6, 2025
Report Date: December 29, 2025
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 TWO INAPPROPRIATE SHOCKS. SVT CONTRIBUTED TO THE FALSE DETECTION. THE RESPONSE BUTTONS WERE PRESSED DURING THE EVENT. THE PATIENT IS TO RECEIVE AN ICD.

Devices

Seq	Brand	Generic	Product Code	Manufacturer	Model	Lot	UDI-DI
2600328	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