Reported Reactions

Devices › Ventricular (assist) bypass

Device brand name · Circulatory assist system

Heartware Ventricular Assist System - Controller 1 0: medical device reports filed with FDA

433 reports name it, 2015–2024. Manufacturer given most often on reports: Heartware. Product code DSQ.

433
device reports naming the brand
0% of all MAUDE reports · about 40 a year
0
reports, 12 months to August 2026
2 in the 12 months before
96.3%
classified as malfunction
37% across the product code
2.3%
classified as death, as reported
10 reports · not verified by FDA

433 medical device reports received by FDA name the brand "Heartware Ventricular Assist System - Controller 1 0" (circulatory assist system); the manufacturer given most often on reports is Heartware; received from September 2015 to October 2024. Brand names are as the reporter or manufacturer wrote them, so one product can appear under several spellings.

0 reports arrived in the 12 months to August 2026, against 2 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 (96.3%), death (2.3%) and injury (1.4%); 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 power problem (39.5%), loose or intermittent connection (17.8%) and connection problem (11.8%). The patient problems coded most often are anxiety, death and syncope. 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

012Sep 2021: 0Oct 2021: 1Nov 2021: 0Dec 2021: 12022Jan 2022: 0Feb 2022: 0Mar 2022: 0Apr 2022: 0May 2022: 0Jun 2022: 0Jul 2022: 0Aug 2022: 0Sep 2022: 0Oct 2022: 0Nov 2022: 0Dec 2022: 02023Jan 2023: 0Feb 2023: 0Mar 2023: 0Apr 2023: 0May 2023: 0Jun 2023: 0Jul 2023: 0Aug 2023: 0Sep 2023: 0Oct 2023: 0Nov 2023: 0Dec 2023: 02024Jan 2024: 0Feb 2024: 1Mar 2024: 1Apr 2024: 0May 2024: 0Jun 2024: 0Jul 2024: 0Aug 2024: 1Sep 2024: 0Oct 2024: 2Nov 2024: 0Dec 2024: 02025Jan 2025: 0Feb 2025: 0Mar 2025: 0Apr 2025: 0May 2025: 0Jun 2025: 0Jul 2025: 0Aug 2025: 0Sep 2025: 0Oct 2025: 0Nov 2025: 0Dec 2025: 02026Jan 2026: 0Feb 2026: 0Mar 2026: 0Apr 2026: 0May 2026: 0Jun 2026: 0Jul 2026: 0Aug 2026: 0

Reports by the month FDA received them. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases.

By year received

01072142015: 420152016: 1920162017: 21420172018: 3820182019: 13420192020: 1320202021: 620212024: 52024

Event type and report source

Event type, as classified on the report

Death2.3%10
Injury1.4%6
Malfunction96.3%417
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%433
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
Power problem17139.5%4.5%
Loose or intermittent connection7717.8%0.9%
Connection problema connection problem5111.8%2.5%
Device displays incorrect message409.2%0.6%
Protective measures problem368.3%0.1%
Date/time-related software problem306.9%0.1%
Disconnection214.8%2%
Pumping stopped143.2%3.2%
No audible alarm112.5%0.4%
Electrical /electronic property probleman electrical or electronic problem81.8%1.9%
Data problem71.6%0.2%
Material integrity problema problem with the device material71.6%1.9%
Device alarm system51.2%0.4%
Material twisted/bent51.2%1%
No display/image51.2%0.2%
Incomplete or inadequate connection40.9%0%
Device inoperablethe device could not be used30.7%0.1%
Overheating of device30.7%0.3%
Battery problema problem with the battery20.5%6.5%
Complete loss of power20.5%1.7%

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
Anxietyanxiety102.3%
Deaththe patient died; cause not stated by this term81.8%
Syncopefainting51.2%
Loss of consciousnesspassing out30.7%
Dizzinesslight-headedness or unsteadiness20.5%
Dyspneashortness of breath20.5%
No patient involvement20.5%
Seizures20.5%
Arrhythmia10.2%
Cardiopulmonary arrest10.2%
Cyanosis10.2%
Falla fall10.2%
Respiratory failurethe lungs could not supply enough oxygen10.2%
Stroke/cva10.2%
Ventricular tachycardiaa fast rhythm from the lower heart chambers10.2%

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

In context

MeasureHeartware Ventricular Assist System - Controller 1 0Product code DSQAll MAUDE reports
Reports433158,08326,136,888
Share of that pool—0.3%0%
Classified as death, per 1,000 reports231469
Classified as injury1.4%48.3%36.2%
Classified as malfunction96.3%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 - Controller 1 0 reports

How many FDA reports name Heartware Ventricular Assist System - Controller 1 0?

433 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 (96.3%), death (2.3%) and injury (1.4%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

power problem (39.5%), loose or intermittent connection (17.8%), connection problem (11.8%), device displays incorrect message (9.2%) and protective measures problem (8.3%). 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 - Controller 1 0 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.