Reported Reactions

Devices › Ventricular (assist) bypass

Device brand name · Ventricular assist bypass

Thoratec Heartmate System Monitor: medical device reports filed with FDA

327 reports name it, 2019–2026. Manufacturer given most often on reports: Thoratec. Product code DSQ.

327
device reports naming the brand
0% of all MAUDE reports · about 45 a year
9
reports, 12 months to August 2026
15 in the 12 months before
99.7%
classified as malfunction
37% across the product code
0%
classified as death, as reported
0 reports · not verified by FDA

327 medical device reports received by FDA name the brand "Thoratec Heartmate System Monitor" (ventricular assist bypass); the manufacturer given most often on reports is Thoratec; received from April 2019 to July 2026. Brand names are as the reporter or manufacturer wrote them, so one product can appear under several spellings.

9 reports arrived in the 12 months to August 2026, down 40% from 15 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 (99.7%) and injury (0.3%); 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 display or visual feedback problem (70%), display difficult to read (11.9%) and pumping stopped (3.1%). 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

0128255Sep 2021: 0Oct 2021: 2Nov 2021: 0Dec 2021: 02022Jan 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: 1May 2023: 2Jun 2023: 1Jul 2023: 0Aug 2023: 0Sep 2023: 0Oct 2023: 0Nov 2023: 1Dec 2023: 22024Jan 2024: 1Feb 2024: 1Mar 2024: 5Apr 2024: 2May 2024: 3Jun 2024: 255Jul 2024: 13Aug 2024: 2Sep 2024: 3Oct 2024: 5Nov 2024: 1Dec 2024: 12025Jan 2025: 1Feb 2025: 0Mar 2025: 2Apr 2025: 0May 2025: 0Jun 2025: 1Jul 2025: 1Aug 2025: 0Sep 2025: 1Oct 2025: 2Nov 2025: 0Dec 2025: 02026Jan 2026: 2Feb 2026: 1Mar 2026: 0Apr 2026: 0May 2026: 0Jun 2026: 2Jul 2026: 1Aug 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

01462922019: 320192020: 320202021: 820212023: 720232024: 29220242025: 820252026: 62026

Event type and report source

Event type, as classified on the report

Death0%0
Injury0.3%1
Malfunction99.7%326
Other0%0
Not given0%0

Who filed the report

Manufacturer report99.7%326
Voluntary report0.3%1
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
Display or visual feedback problem22970%0.7%
Display difficult to read3911.9%0.2%
Pumping stopped103.1%3.2%
Data problem82.4%0.2%
Communication or transmission problemthe device could not communicate or transmit61.8%0.8%
No display/image41.2%0.2%
Unexpected shutdown30.9%0.1%
Alarm not visible20.6%0.1%
Application program version or upgrade problem10.3%0%
Calibration problem10.3%0%
Failure to interrogate10.3%0.1%
Insufficient device problem information10.3%1.8%
Mechanical problema mechanical problem10.3%5.5%
No audible alarm10.3%0.4%
Noise, audible10.3%0.4%

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.

In context

MeasureThoratec Heartmate System MonitorProduct code DSQAll MAUDE reports
Reports327158,08326,136,888
Share of that pool—0.2%0%
Classified as death, per 1,000 reports01469
Classified as injury0.3%48.3%36.2%
Classified as malfunction99.7%37%62.3%
Filed by the manufacturer99.7%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 Thoratec Heartmate System Monitor reports

How many FDA reports name Thoratec Heartmate System Monitor?

327 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 9 in the latest 12 months.

What kinds of events are reported?

malfunction (99.7%) and injury (0.3%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

display or visual feedback problem (70%), display difficult to read (11.9%), pumping stopped (3.1%), data problem (2.4%) and communication or transmission problem (1.8%). These are FDA's device problem codes as entered on the report.

Who files these reports?

manufacturer reports (99.7%) and voluntary reports (0.3%). Manufacturers and user facilities are required to report; voluntary reports come from health professionals and the public.

Do these reports show that Thoratec Heartmate System Monitor 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.