Reported Reactions

Devices › Ventricular (assist) bypass

Device brand name · Ventricular assisst bypass

Heartware Ventricular Assist System-Battery: medical device reports filed with FDA

448 reports name it, 2015–2019. Manufacturer given most often on reports: Heartware. Product code DSQ.

448
device reports naming the brand
0% of all MAUDE reports · about 42 a year
0
reports, 12 months to August 2026
0 in the 12 months before
100%
classified as malfunction
37% across the product code
0%
classified as death, as reported
0 reports · not verified by FDA

FDA's MAUDE database holds 448 reports that name the brand "Heartware Ventricular Assist System-Battery" (ventricular assisst bypass), received between November 2015 and August 2019; the manufacturer given most often on reports is Heartware. Spellings of one product vary from report to report.

0 reports arrived in the 12 months to August 2026, and none in the 12 months before. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases. The event types recorded are malfunction (100%); across all ventricular (assist) bypass reports (product code DSQ) death is recorded in 14.6% and malfunction in 37%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are battery problem (91.3%), material integrity problem (4.2%) and connection problem (3.3%). The patient problems coded most often are no patient involvement, anxiety and complaint, ill-defined. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."

Reports by month, five years

No report naming Heartware Ventricular Assist System-Battery was received in the five years to August 2026; the latest was received in August 2019.

By year received

01442872015: 420152017: 9920172018: 28720182019: 582019

Event type and report source

Event type, as classified on the report

Death0%0
Injury0%0
Malfunction100%448
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%448
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 158,083 reports carrying product code DSQ. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
Battery problema problem with the battery40991.3%6.5%
Material integrity problema problem with the device material194.2%1.9%
Connection problema connection problem153.3%2.5%
Material deformation92%0.9%
Power problem71.6%4.5%
Device displays incorrect message40.9%0.6%
Failure to charge40.9%0.4%
Charging problem30.7%0%
Failure to power up30.7%0.2%
Breakthe device broke10.2%2.6%
Communication or transmission problemthe device could not communicate or transmit10.2%0.8%
Complete loss of power10.2%1.7%
Crackthe device cracked10.2%0.1%
Date/time-related software problem10.2%0.1%
Device misassembled during manufacturing /shipping10.2%0%
Manufacturing, packaging or shipping problem10.2%0%
Restricted flow rate10.2%0.1%

FDA's device problem codes as entered on the report; one report can carry several. Generic codes such as "no apparent adverse event" are left out.

Patient problems coded

Patient problem (FDA code)ReportsShare
No patient involvement40.9%
Anxietyanxiety10.2%
Complaint, ill-defined10.2%

Patient problem codes are present mainly in reports filed since 2019 and are often blank.

In context

MeasureHeartware Ventricular Assist System-BatteryProduct code DSQAll MAUDE reports
Reports448158,08326,136,888
Share of that pool—0.3%0%
Classified as death, per 1,000 reports01469
Classified as injury0%48.3%36.2%
Classified as malfunction100%37%62.3%
Filed by the manufacturer100%97%94.9%

Shares are of reports, not of devices in use. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."

Other brands with product code DSQ

BrandReportsLatest 12 monthsClassified as death
HeartWare Ventricular Assist System - Pump36,4501,30413.4%
Heartware Ventricular Assist System14,55006.9%
HeartMate 3 LVAS Implant Kit13,50062638%
Thoratec HeartMate 3 LVAS Implant Kit8,1303,00829.7%
HeartMate 3 Left Ventricular Assist System5,85812218.6%
HeartWare Ventricular Assist System - Controller 2.05,8311320.5%
HeartWare Ventricular Assist System - Battery5,010470%
Thoratec HeartMate 3 System Controller3,5911,3870%
HeartMate 3 System Controller3,4732470.3%
HeartWare Ventricular Assist System - Driveline3,0031591.5%
HeartWare Ventricular Assist System - Pump/Driveline2,16014716.6%
Heartmate Mobile Power Unit Na2,09640.1%
Heartware Ventricular Assist System-Pump1,424019.9%
Heartware Ventricular Assist System- Pump1,306035.4%
Heartmate Mobile Power Unit N/A1,2345190%

Ordered by report count for navigation only. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA also states that "common products may have a higher number of adverse events due to the higher total number of people using the product."

Questions about Heartware Ventricular Assist System-Battery reports

How many FDA reports name Heartware Ventricular Assist System-Battery?

448 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 0 in the latest 12 months.

What kinds of events are reported?

malfunction (100%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

battery problem (91.3%), material integrity problem (4.2%), connection problem (3.3%), material deformation (2%) and power problem (1.6%). These are FDA's device problem codes as entered on the report.

Who files these reports?

manufacturer reports (100%). Manufacturers and user facilities are required to report; voluntary reports come from health professionals and the public.

Do these reports show that Heartware Ventricular Assist System-Battery was at fault?

No. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA adds that "a causal relationship cannot be established between product and reactions listed in a report."

How do I report a problem with a medical device?

Through FDA MedWatch (Form FDA 3500 for health professionals and consumers), or to the manufacturer. See the guide on how to report.

Where this comes from. Counts are built from the openFDA Device Adverse Event (MAUDE) bulk export released 28 Sep 2026, which holds reports FDA received through 31 Aug 2026. Brand, generic and manufacturer names are as written on the reports; product code names come from FDA's device classification. A report counts here when any device it lists carries this brand name after punctuation and capitalisation are normalised. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.

Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.