510(k) · Cleared
ClearedRhythmStar System
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
RhythMedix, LLC · QYX Outpatient Cardiac Telemetry
Cleared on Jul 8, 2024 as substantially equivalent to K141813 (RhythMedix, LLC, 2014) and 1 other predicate after a 244-day review. Its family tree reaches back 12 generations to 1988. 1 later device descends from it.
- Decided
- Jul 8, 2024
- Review
- 244 days
- Class
- Class II
- Product code
- QYX
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 12 generations to K882803 (1988). 63 ancestors in all, the oldest K881905 (1988). 1 later device descends from it, 1 citing it directly.
- Root · 12 generations backK882803 ET HI-Flow Soft Tip/ET HI-Flow/Enhanced Torque STAdvanced Cardiovascular Systems, Inc. · 1988
- 8 generations between
- 3 generations backK113372 Nuvant, Mobilc Cardiac TelemetryCorventis, Inc. · 2012
- 2 generations backK133701 Nuvant MCT SystemCorventis, Inc. · 2014
- 1 generation backK163512 Zio AT ECG Monitoring SystemiRhythm Technologies, Inc. · 2017 · Recalled
- This deviceK233584 RhythmStar SystemRhythMedix, LLC · 2024
- Descendant · cites it directly · 0 of its ownK250793 RhythmStar System (SL)RhythMedix, LLC · 2026
Show all 12 generations
- Root · 12 generations backK882803 ET HI-Flow Soft Tip/ET HI-Flow/Enhanced Torque STAdvanced Cardiovascular Systems, Inc. · 1988
- 11 generations backK012241 Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model…Cardionet, Inc. · 2002
- 10 generations backK052240 Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model 1002Cardionet, Inc. · 2005
- 9 generations backK063222 Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model…Cardionet, Inc. · 2006
- 8 generations backK072558 Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model…Cardionet, Inc. · 2007
- 7 generations backK083287 Avivo Mobile Patient Management SystemCorventis, Inc. · 2009
- 6 generations backK090696 Nuvant Cardiac Event Monitoring System; Nuvant Mobile Cardiac…Corventis, Inc. · 2009
- 5 generations backK091971 Avivo Mobile Patient Management System, Nuvant Mobile Cardiac…Corventis, Inc. · 2009
- 4 generations backK111917 Nuvant, Mobile Cardiac TelemetryCorventis, Inc. · 2011
- 3 generations backK113372 Nuvant, Mobilc Cardiac TelemetryCorventis, Inc. · 2012
- 2 generations backK133701 Nuvant MCT SystemCorventis, Inc. · 2014
- 1 generation backK163512 Zio AT ECG Monitoring SystemiRhythm Technologies, Inc. · 2017 · Recalled
- This deviceK233584 RhythmStar SystemRhythMedix, LLC · 2024
Most influential descendants
Showing 1 of 1 · See all- K250793RhythmStar System (SL)RhythMedix, LLC · 2026 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −12 | K882803 | ET HI-Flow Soft Tip/ET HI-Flow/Enhanced Torque ST | Advanced Cardiovascular Systems, Inc. | 1988 | — |
| −11 | K012241 | Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model CN1001 | Cardionet, Inc. | 2002 | — |
| −10 | K052240 | Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model 1002 | Cardionet, Inc. | 2005 | — |
| −9 | K063222 | Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model CN1004 | Cardionet, Inc. | 2006 | — |
| −8 | K072558 | Cardionet Ambulatory Ecg Monitor with Arrhythmia Detection, Model CN1005 | Cardionet, Inc. | 2007 | — |
| −7 | K083287 | Avivo Mobile Patient Management System | Corventis, Inc. | 2009 | — |
| −6 | K090696 | Nuvant Cardiac Event Monitoring System; Nuvant Mobile Cardiac Telemetry System | Corventis, Inc. | 2009 | — |
| −5 | K091971 | Avivo Mobile Patient Management System, Nuvant Mobile Cardiac Telemetry (MCT)… | Corventis, Inc. | 2009 | — |
| −4 | K111917 | Nuvant, Mobile Cardiac Telemetry | Corventis, Inc. | 2011 | — |
| −3 | K113372 | Nuvant, Mobilc Cardiac Telemetry | Corventis, Inc. | 2012 | — |
| −2 | K133701 | Nuvant MCT System | Corventis, Inc. | 2014 | — |
| −1 | K163512 | Zio AT ECG Monitoring System | iRhythm Technologies, Inc. | 2017 | 1 |
| 0 (this device) | K233584 | RhythmStar System | RhythMedix, LLC | 2024 | — |
| +1 | K250793 | RhythmStar System (SL) | RhythMedix, LLC | 2026 | — |
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 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 0 |
| 2003 | 1 | 0 |
| 2004 | 4 | 0 |
| 2005 | 6 | 0 |
| 2006 | 2 | 0 |
| 2007 | 2 | 0 |
| 2008 | 3 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 2 | 0 |
| 2014 | 2 | 0 |
| 2015 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 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 QYX? 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 QYX device
- #1 K250793 RhythmStar System (SL)score 14.8 · 13 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (2)
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 |
|---|---|---|---|
| * | K141813 | Rhythmstar SystemSummary page 5…Common Name Telephone electrocardiograph transmitter and receiver 510(k) Submitter / Holder RhythMedix, LLC 510(k) Number K141813 Regulation Number 21 CFR Part 870.2920 Classification Panel Cardiovascular Product Code… | 2014 |
| * | K163512 | Zio AT ECG Monitoring SystemSummary page 5…ring System Common Name Outpatient cardiac telemetry 510(k) Submitter / Holder iRhythm Technologies, Inc. 510(k) Number K163512 Regulation Number 21 CFR Part 870.1025 Classification Panel Cardiovascular Product Code… | 2017 |
What descends from it? (1)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K250793 | RhythmStar System (SL) | 2026 | 0 |
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 36 years and passes through 5 companies; a new generation was cleared every 1.9 years on median.
- 2 of the 63 ancestors have a recall of any class.
- Of its descendants, K250793 (RhythMedix, LLC, 2026) has gone furthest, with 0 descendants of its own.
- 3 other devices also cite its predicate K141813.
How does its category compare?
All QYX devicesQYX Outpatient Cardiac Telemetry: FDA decisions, review times, recalls and adverse event reports over 20 years. 2024, this device’s year, is highlighted.
FDA decisions per year · QYX
1in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · QYX
244in 2024
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · QYX
No recall names QYX since 2007.
Adverse event reports per year · QYX
107in 2025
MAUDE reports naming product code QYX, 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 | 1 | — | 0 | 0 |
| 2008 | 0 | — | 0 | 0 |
| 2009 | 1 | — | 0 | 0 |
| 2010 | 1 | — | 0 | 0 |
| 2011 | 2 | — | 0 | 0 |
| 2012 | 1 | — | 0 | 0 |
| 2013 | 0 | — | 0 | 0 |
| 2014 | 2 | — | 0 | 0 |
| 2015 | 0 | — | 0 | 0 |
| 2016 | 1 | — | 0 | 0 |
| 2017 | 3 | 169 | 0 | 0 |
| 2018 | 0 | — | 0 | 0 |
| 2019 | 0 | — | 0 | 0 |
| 2020 | 0 | — | 0 | 0 |
| 2021 | 0 | — | 0 | 0 |
| 2022 | 0 | — | 0 | 0 |
| 2023 | 0 | — | 0 | 74 |
| 2024 | 3 | 244 | 0 | 400 |
| 2025 | 1 | — | 0 | 107 |
| 2026 | 1 | — | 0 | — |
What is it indicated for?
The RhythmStar system is intended for use by patients who either have or are at risk of having cardiac disease and those that demonstrate intermittent symptoms indicative of cardiac disease and require cardiac monitoring on a continuing basis. The device continuously records ECG and upon detection by an ECG analysis algorithm or manually initiated by the patient, automatically delivers all recorded cardiac activity to the cloud server where it is…
Read the full statement (188 words)
The RhythmStar system is intended for use by patients who either have or are at risk of having cardiac disease and those that demonstrate intermittent symptoms indicative of cardiac disease and require cardiac monitoring on a continuing basis. The device continuously records ECG and upon detection by an ECG analysis algorithm or manually initiated by the patient, automatically delivers all recorded cardiac activity to the cloud server where it is presented and can be retrospectively reviewed by a medical professional at a monitoring center. The RhythmStar system is not intended for real-time monitoring.
The data received from the RhythmStar device can be used for retrospective review, arrhythmia analysis, and further evaluation, reporting and signal measurements using RhythmStar system or a compatible arrhythmia analysis software that has been FDA cleared for Lead II analysis using non-traditional wet electrode placement. The RhythmStar system is not intended to sound any alarms.
The device does not deliver any therapy, administer any drugs, or provide for life support. The RhythmStar system does not provide interpretive or diagnostic statements. Interpretation and diagnosis are the responsibility of a physician. RhythmStar is for prescription use only.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K233584 · printed Nov 5, 2026
Cite this page
510(k) Report. “K233584: RhythmStar System.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 5, 2026. https://510kreport.com/device/K233584
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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