510(k) · Cleared
ClearedZio XT ECG Monitoring System, Zio AT ECG Monitoring System
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
iRhythm Technologies, Inc. · DQK Computer, Diagnostic, Programmable
Cleared on Aug 23, 2019 as substantially equivalent to K181502 (iRhythm Technologies, Inc., 2018) after a 169-day review. Its family tree reaches back 13 generations to 1988. 4 later devices descend from it.
- Decided
- Aug 23, 2019
- Review
- 169 days
- Class
- Class II
- Product code
- DQK
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 13 generations to K882803 (1988). 54 ancestors in all, the oldest K881905 (1988). 4 later devices descend from it, 1 citing it directly.
- Root · 13 generations backK882803 ET HI-Flow Soft Tip/ET HI-Flow/Enhanced Torque STAdvanced Cardiovascular Systems, Inc. · 1988
- 9 generations between
- 3 generations backK133701 Nuvant MCT SystemCorventis, Inc. · 2014
- 2 generations backK163512 Zio AT ECG Monitoring SystemiRhythm Technologies, Inc. · 2017 · Recalled
- 1 generation backK181502 Zio AT ECG Monitoring System, ZEUS SystemiRhythm Technologies, Inc. · 2018
- This deviceK190593 Zio XT ECG Monitoring System, Zio AT ECG Monitoring SystemiRhythm Technologies, Inc. · 2019
- Descendant · cites it directly · 3 of its ownK202527 Zio ECG Utilization Software (ZEUS) SystemiRhythm Technologies, Inc. · 2021
- Descendant · 2 generations on · 1 of its ownK222389 ZEUS SystemiRhythm Technologies, Inc. · 2023
- Descendant · 3 generations on · 0 of its ownK252859 ZEUS Platform (FG0501US)iRhythm Technologies, Inc. · 2026
- Descendant · 2 generations on · 0 of its ownK213409 ZEUS System (Zio Watch)iRhythm Technologies, Inc. · 2022
Show all 13 generations
- Root · 13 generations backK882803 ET HI-Flow Soft Tip/ET HI-Flow/Enhanced Torque STAdvanced Cardiovascular Systems, Inc. · 1988
- 12 generations backK012241 Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model…Cardionet, Inc. · 2002
- 11 generations backK052240 Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model 1002Cardionet, Inc. · 2005
- 10 generations backK063222 Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model…Cardionet, Inc. · 2006
- 9 generations backK072558 Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model…Cardionet, Inc. · 2007
- 8 generations backK083287 Avivo Mobile Patient Management SystemCorventis, Inc. · 2009
- 7 generations backK090696 Nuvant Cardiac Event Monitoring System; Nuvant Mobile Cardiac…Corventis, Inc. · 2009
- 6 generations backK091971 Avivo Mobile Patient Management System, Nuvant Mobile Cardiac…Corventis, Inc. · 2009
- 5 generations backK111917 Nuvant, Mobile Cardiac TelemetryCorventis, Inc. · 2011
- 4 generations backK113372 Nuvant, Mobilc Cardiac TelemetryCorventis, Inc. · 2012
- 3 generations backK133701 Nuvant MCT SystemCorventis, Inc. · 2014
- 2 generations backK163512 Zio AT ECG Monitoring SystemiRhythm Technologies, Inc. · 2017 · Recalled
- 1 generation backK181502 Zio AT ECG Monitoring System, ZEUS SystemiRhythm Technologies, Inc. · 2018
- This deviceK190593 Zio XT ECG Monitoring System, Zio AT ECG Monitoring SystemiRhythm Technologies, Inc. · 2019
Most influential descendants
Showing 4 of 4 · See all- K202527Zio ECG Utilization Software (ZEUS) SystemiRhythm Technologies, Inc. · 2021 · cites it directly3descendants
- K222389ZEUS SystemiRhythm Technologies, Inc. · 2023 · 2 generations on1descendant
- K252859ZEUS Platform (FG0501US)iRhythm Technologies, Inc. · 2026 · 3 generations on0descendants
- K213409ZEUS System (Zio Watch)iRhythm Technologies, Inc. · 2022 · 2 generations on0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −13 | K882803 | ET HI-Flow Soft Tip/ET HI-Flow/Enhanced Torque ST | Advanced Cardiovascular Systems, Inc. | 1988 | — |
| −12 | K012241 | Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model CN1001 | Cardionet, Inc. | 2002 | — |
| −11 | K052240 | Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model 1002 | Cardionet, Inc. | 2005 | — |
| −10 | K063222 | Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model CN1004 | Cardionet, Inc. | 2006 | — |
| −9 | K072558 | Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model CN1005 | Cardionet, Inc. | 2007 | — |
| −8 | K083287 | Avivo Mobile Patient Management System | Corventis, Inc. | 2009 | — |
| −7 | K090696 | Nuvant Cardiac Event Monitoring System; Nuvant Mobile Cardiac Telemetry System | Corventis, Inc. | 2009 | — |
| −6 | K091971 | Avivo Mobile Patient Management System, Nuvant Mobile Cardiac Telemetry (MCT)… | Corventis, Inc. | 2009 | — |
| −5 | K111917 | Nuvant, Mobile Cardiac Telemetry | Corventis, Inc. | 2011 | — |
| −4 | K113372 | Nuvant, Mobilc Cardiac Telemetry | Corventis, Inc. | 2012 | — |
| −3 | K133701 | Nuvant MCT System | Corventis, Inc. | 2014 | — |
| −2 | K163512 | Zio AT ECG Monitoring System | iRhythm Technologies, Inc. | 2017 | 1 |
| −1 | K181502 | Zio AT ECG Monitoring System, ZEUS System | iRhythm Technologies, Inc. | 2018 | — |
| 0 (this device) | K190593 | Zio XT ECG Monitoring System, Zio AT ECG Monitoring System | iRhythm Technologies, Inc. | 2019 | — |
| +1 | K202527 | Zio ECG Utilization Software (ZEUS) System | iRhythm Technologies, Inc. | 2021 | — |
| +2 | K222389 | ZEUS System | iRhythm Technologies, Inc. | 2023 | — |
| +3 | K252859 | ZEUS Platform (FG0501US) | iRhythm Technologies, Inc. | 2026 | — |
| +2 | K213409 | ZEUS System (Zio Watch) | iRhythm Technologies, Inc. | 2022 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1988 | 2 | 0 |
| 1992 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 0 |
| 2004 | 4 | 0 |
| 2005 | 4 | 0 |
| 2006 | 1 | 0 |
| 2007 | 2 | 0 |
| 2008 | 2 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 1 | 0 |
| 2015 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2021 | 1 | 0 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2026 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA summary (predicates and indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in DQK? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new DQK device
- #1 K213682 HemoSphere Advanced Monitor, HemoSphere…score 26.6 · 28 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (1)
Devices the submitter claimed this one is substantially equivalent to (*), and reference devices cited for a specific test or feature (†), as written in the FDA summary.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | K181502 | Zio AT ECG Monitoring System, ZEUS SystemSummary page 4…t Codes: DQK III. Predicate Devices The following predicate device has been selected: − iRhythm Technologies, Inc. Zio® AT ECG Monitoring System [K181502] No reference devices were used in this submission.… | 2018 |
What descends from it? (4)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K202527 | Zio ECG Utilization Software (ZEUS) System | 2021 | 3 |
Has anything in its family been recalled? (0 Class I)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
What does this lineage say?
- The line of descent spans 31 years and passes through 4 companies; a new generation was cleared every 1.2 years on median.
- 2 of the 54 ancestors have a recall of any class.
- Of its descendants, K202527 (iRhythm Technologies, Inc., 2021) has gone furthest, with 3 descendants of its own.
- 1 other device also cites its predicate K181502.
How does its category compare?
All DQK devicesDQK Computer, Diagnostic, Programmable: FDA decisions, review times, recalls and adverse event reports over 20 years. 2019, this device’s year, is highlighted.
FDA decisions per year · DQK
23so far in 2026, the most since 2007
2026 to Oct 25, outlined.
Median 510(k) review, days · DQK
95in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · DQK
1in 2025
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · DQK
433in 2025
MAUDE reports naming product code DQK, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 13 | 83 | 4 | 18 |
| 2008 | 4 | 70 | 1 | 34 |
| 2009 | 12 | 93 | 2 | 40 |
| 2010 | 9 | 64 | 3 | 49 |
| 2011 | 12 | 69 | 2 | 55 |
| 2012 | 7 | 74 | 3 | 129 |
| 2013 | 13 | 68 | 1 | 180 |
| 2014 | 9 | 90 | 4 | 115 |
| 2015 | 7 | 125 | 2 | 131 |
| 2016 | 15 | 190 | 0 | 340 |
| 2017 | 7 | 146 | 2 | 252 |
| 2018 | 14 | 150 | 6 | 261 |
| 2019 | 15 | 113 | 1 | 218 |
| 2020 | 16 | 123 | 1 | 215 |
| 2021 | 16 | 132 | 1 | 351 |
| 2022 | 19 | 136 | 2 | 319 |
| 2023 | 21 | 133 | 2 | 340 |
| 2024 | 13 | 100 | 24 | 557 |
| 2025 | 22 | 95 | 1 | 433 |
| 2026 | 23 | 151 | 2 | — |
What is it indicated for?
The Zio ECG Utilization Service (ZEUS) System is intended to analyze and report symptomatic and asymptomatic cardiac events and continuous electrocardiogram information for long-term monitoring. After patient monitoring by Zio XT or Zio AT Patch, a final report is generated based on the beat-to-beat information from the entire ECG recording. It is indicated for use on patients 18 years or older who may be asymptomatic or who may suffer from transient…
Read the full statement (120 words)
The Zio ECG Utilization Service (ZEUS) System is intended to analyze and report symptomatic and asymptomatic cardiac events and continuous electrocardiogram information for long-term monitoring. After patient monitoring by Zio XT or Zio AT Patch, a final report is generated based on the beat-to-beat information from the entire ECG recording. It is indicated for use on patients 18 years or older who may be asymptomatic or who may suffer from transient symptoms such as palpitations, shortness of breath, dizziness, light-headedness, pre-syncope, syncope, fatigue, or anxiety and patients who are asymptomatic. The reports are provided for review by the intended user to render a diagnosis based on clinical judgment and experience. It is not intended for use on critical care patients.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K190593 · printed Nov 6, 2026
Cite this page
510(k) Report. “K190593: Zio XT ECG Monitoring System, Zio AT ECG Monitoring System.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K190593
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Record history
- FDA decision record loaded May 2, 2026
- Summary read Oct 13, 2026 (extraction version 9eaa42aa01ed)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026