510(k) · Cleared
ClearedHolter 2000
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Zymed Medical Instrumentation · MLO Electrocardiograph, Ambulatory, With Analysis Algorithm
Cleared on Apr 13, 1999 as substantially equivalent to K955015 (Zymed Medical Instrumentation, 1996) after an 84-day review. Its family tree reaches back 2 generations to 1994. 89 later devices descend from it.
- Decided
- Apr 13, 1999
- Review
- 84 days
- Class
- Class II
- Product code
- MLO
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 2 generations to K930806 (1994). 89 later devices descend from it, 4 citing it directly.
- Root · 2 generations backK930806 Zymed Holter Scanner Model 2010Agilent Technologies · 1994
- 1 generation backK955015 Zymed Holter Scanner Model 2010Zymed Medical Instrumentation · 1996
- This deviceK990170 Holter 2000Zymed Medical Instrumentation · 1999
- Descendant · cites it directly · 85 of its ownK010949 2010 Plus Holter for WindowsAgilent Technologies · 2001
- Descendant · 2 generations on · 46 of its ownK042108 Vista PlusNovacor · 2005
- Descendant · 3 generations on · 40 of its ownK071641 Reveal XT; Insertable Cardiac Monitor (Model 9529), Patient…Medtronic, Inc. · 2007
- Descendant · 3 generations on · 30 of its ownK071655 Reveal DX Insertable Cardiac Monitor, Reveal Patient Assistant…Medtronic, Inc. · 2007
- Descendant · 4 generations on · 28 of its ownK082475 Reveal XT Insertable Cardiac Monitor, Model 9529, Revel DX…Medtronic, Inc. · 2008
Showing 5 of 89 descendants. See all descendants
Descendants cleared per year
Most influential descendants
Showing 5 of 89 · See all- K0109492010 Plus Holter for WindowsAgilent Technologies · 2001 · cites it directly85descendants
- K042108Vista PlusNovacor · 2005 · 2 generations on46descendants
- K071641Reveal XT; Insertable Cardiac Monitor (Model 9529), Patient Assistant (Model 9539)Medtronic, Inc. · 2007 · 3 generations on40descendants
- K071655Reveal DX Insertable Cardiac Monitor, Reveal Patient Assistant, Model (S) 9528,9538Medtronic, Inc. · 2007 · 3 generations on30descendants
- K082475Reveal XT Insertable Cardiac Monitor, Model 9529, Revel DX Insertable Cardiac Monitor…Medtronic, Inc. · 2008 · 4 generations on28descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −2 | K930806 | Zymed Holter Scanner Model 2010 | Agilent Technologies | 1994 | — |
| −1 | K955015 | Zymed Holter Scanner Model 2010 | Zymed Medical Instrumentation | 1996 | — |
| 0 (this device) | K990170 | Holter 2000 | Zymed Medical Instrumentation | 1999 | — |
| +1 | K010949 | 2010 Plus Holter for Windows | Agilent Technologies | 2001 | — |
| +2 | K042108 | Vista Plus | Novacor | 2005 | — |
| +3 | K071641 | Reveal XT; Insertable Cardiac Monitor (Model 9529), Patient Assistant (Model… | Medtronic, Inc. | 2007 | — |
| +3 | K071655 | Reveal DX Insertable Cardiac Monitor, Reveal Patient Assistant, Model (S)… | Medtronic, Inc. | 2007 | — |
| +4 | K082475 | Reveal XT Insertable Cardiac Monitor, Model 9529, Revel DX Insertable Cardiac… | Medtronic, Inc. | 2008 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1999 | 1 | 0 |
| 2001 | 3 | 0 |
| 2004 | 1 | 0 |
| 2005 | 3 | 0 |
| 2006 | 1 | 0 |
| 2007 | 3 | 0 |
| 2008 | 2 | 0 |
| 2009 | 2 | 0 |
| 2010 | 2 | 0 |
| 2011 | 2 | 0 |
| 2012 | 2 | 0 |
| 2013 | 3 | 0 |
| 2014 | 4 | 0 |
| 2015 | 7 | 0 |
| 2016 | 7 | 0 |
| 2017 | 7 | 0 |
| 2018 | 2 | 0 |
| 2019 | 4 | 0 |
| 2020 | 6 | 0 |
| 2021 | 4 | 0 |
| 2022 | 4 | 0 |
| 2023 | 7 | 0 |
| 2024 | 2 | 0 |
| 2025 | 6 | 0 |
| 2026 | 4 | 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 MLO? 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 MLO device
- #1 K261580 ZBPro Diagnostic (Version 2.0)score 13.8 · 7 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 |
|---|---|---|---|
| * | K955015 | Zymed Holter Scanner Model 2010Summary page 1…ythmia detector/medical cathode — ray tube display (per 21 CFR 870.2450) Legally marketed device to which S.E. is claimed. Zymed Holtcr Scanner Modcl 2010 Plus — 510(k) K955015 Description: The Holter 2000 is a device that analyzes recorded cardiac ECG and creates reports from the recorded data. The ECG… | 1996 |
What descends from it? (89)
See all 894 later devices cite it directly; ranked here by how many devices descend from each in turn.
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 5 years and passes through 2 companies; a new generation was cleared every 3.1 years on median.
- None of the 2 ancestors has a recall.
- Of its descendants, K010949 (Agilent Technologies, 2001) has gone furthest, with 85 descendants of its own.
- 4 other devices also cite its predicate K955015.
How does its category compare?
All MLO devicesMLO Electrocardiograph, Ambulatory, With Analysis Algorithm: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · MLO
1in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · MLO
238in 2011
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · MLO
2in 2024
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · MLO
4in 2025
MAUDE reports naming product code MLO, 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 | 0 | — | 0 | 5 |
| 2010 | 1 | — | 0 | 1 |
| 2011 | 3 | 238 | 0 | 1 |
| 2012 | 1 | — | 0 | 0 |
| 2013 | 2 | — | 0 | 0 |
| 2014 | 1 | — | 0 | 1 |
| 2015 | 0 | — | 0 | 0 |
| 2016 | 0 | — | 0 | 0 |
| 2017 | 0 | — | 0 | 1 |
| 2018 | 1 | — | 0 | 1 |
| 2019 | 0 | — | 0 | 1 |
| 2020 | 2 | — | 0 | 0 |
| 2021 | 0 | — | 0 | 1 |
| 2022 | 0 | — | 0 | 1 |
| 2023 | 0 | — | 0 | 1 |
| 2024 | 1 | — | 2 | 2 |
| 2025 | 1 | — | 0 | 4 |
| 2026 | 1 | — | 0 | — |
What is it indicated for?
Assessment of symptoms that may be related to rhythm disturbances of the heart in patients from pediatric to adult age. Patients with palpitations. Assessment of risk in Patients With or Without Symptoms of Arrhythmia. Patients with symptomatic or asymptomatic idiopathic hypertrophic cardiomyopathy and postmyocardial infarction patient with left ventricular dysfunction using arrhythmia e.g.: ventricular ectopy, as method of risk assessment. Assessment of…
Read the full statement (125 words)
Assessment of symptoms that may be related to rhythm disturbances of the heart in patients from pediatric to adult age. Patients with palpitations.
Assessment of risk in Patients With or Without Symptoms of Arrhythmia. Patients with symptomatic or asymptomatic idiopathic hypertrophic cardiomyopathy and postmyocardial infarction patient with left ventricular dysfunction using arrhythmia e.g.: ventricular ectopy, as method of risk assessment.
Assessment of efficacy of Antiarrhythmia Therapy. Patients with baseline high frequency, reproducible, sustained, symptomatic premature ventricular complexes supraventricular arrhythmia or ventricular tachycardia.
Assessment of Pacemaker Function. Evaluation of patients with paroxysmal symptoms, detection of myopotential inhibition, detection of pacemaker mediated tachycardia, evaluation of antitachycardia pacing device function, evaluation of rate-responsive physiological pacing function.
Detection of Myocardial Ischemia. Patients with chest pain suggestive of Prinzmetal’s angina.
Indications for use read by OCR from a scanned FDA summary, so letters may be misread. Check the PDF before quoting it.
https://510kreport.com/device/K990170 · printed Nov 4, 2026
Cite this page
510(k) Report. “K990170: Holter 2000.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K990170
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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