K071228 · Signalife, Inc. · DXH · Nov 21, 2007 · Cardiovascular
Device Facts
Record ID
K071228
Device Name
FIDELITY 200 CARDIAC EVENT RECORDER
Applicant
Signalife, Inc.
Product Code
DXH · Cardiovascular
Decision Date
Nov 21, 2007
Decision
SESE
Submission Type
Abbreviated
Regulation
21 CFR 870.2920
Device Class
Class 2
Indications for Use
The Signalife Fidelity 200 Cardiac Event Recorder is a battery operated, single lead ECG event recorder capable of recording one, 45-second event of ECG data for the purpose of transtelephonic transmission to a cardiac monitoring station for analysis and diagnosis by a medical professional where cardiac monitoring is desired by a subscriber to the service. The system includes recording of a single 45-second ECG and transtelephonic transmission of the recorded data to a monitoring station. The ECG recording is then transferred to another device, such as the PaceArt® System K024278 manufactured by Medtronic, Inc. for ECG analysis. The Signalife Fidelity 200 Cardiac Event Recorder is not intended to sound any physiological alarms. The Signalife Fidelity 200 Cardiac Event Recorder can be obtained over-the-counter (OTC) or direct-to-consumer by qualified individuals who wish to have access to a cardiac monitoring service.
Device Story
Battery-operated, single-lead ECG event recorder; captures 45-second ECG signal upon user activation. Device digitizes signal and stores it on internal memory chip; utilizes proprietary signal processing to minimize noise from ambulatory movement. Data transmitted transtelephonically to monitoring station; subsequently transferred to external analysis systems (e.g., PaceArt System). Used by consumers in home/non-clinical settings; no physician required for operation, though physician verification required for service enrollment. Device provides no real-time analysis, no alarms, and no therapeutic value; intended solely for screening/monitoring. Output facilitates physician review of cardiac rhythm data to aid clinical diagnosis.
Clinical Evidence
No clinical data provided. Substantial equivalence based on bench testing and comparison of technological characteristics to predicate devices.
Technological Characteristics
Battery-operated, single-lead ECG event recorder. Features proprietary signal processing for noise reduction. Stores 45-second digitized ECG on memory chip. Connectivity via transtelephonic transmission. Standalone form factor with push-button operation.
Indications for Use
Indicated for individuals concerned about heart rhythm experiencing palpitations, racing/irregular pulse, lightheadedness, faintness, or history of arrhythmia. Contraindicated for patients with pacemakers, defibrillators, coronary artery blockage, heart valve problems, heart transplant, congestive heart failure, or history of loss of consciousness without physician authorization. Users must be able to read/understand instructions, place device on chest for 45 seconds, hear beeps, speak English, and operate a telephone/push-button device.
Regulatory Classification
Identification
A telephone electrocardiograph transmitter and receiver is a device used to condition an electrocardiograph signal so that it can be transmitted via a telephone line to another location. This device also includes a receiver that reconditions the received signal into its original format so that it can be displayed. The device includes devices used to transmit and receive pacemaker signals.
Predicate Devices
HeartCard® Telephone Electrocardiograh Transmitter and Receiver (K010945)
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# K071228
Signalife, Inc 510(k) Summary of Safety and Effectiveness Signalife, Inc. Fidelity 200 Cardiac Event Recorder Section 5
# 510(k) SUMMARY OF SAFETY AND EFFECTIVENESS
#### 1. Sponsor:
NOV 2 1 2007 Signalife, Inc. 531 S. Main St. #301 Greenville, SC 29601 Phone (864) 233-2300 Facsimile (864) 233-2100 Contact Person: William R. Matthews, Regulatory Affairs Date Prepared: April 30, 2007 2. Device Name: Signalife Fidelity 200 Cardiac Event Recorder Trade or Proprietary Name: Fidelity 200 Cardiac Event Recorder Common or Usual Name: Cardiac Event Recorder Classification Name: 21 CFR 870.2920 - Transmitters and Receivers . Electrocardiograph, Telephone 21 CFR 870.2800 -- Medical Magnetic Tape Recorder . 3. Predicate Devices: The Signalife Fidelity 200 Cardiac Event Recorder is equivalent to: HeartCard® Telephone Electrocardiograh Transmitter and . Receiver, K010945, Instromedix, Inc. Card Guard CG-2206 1-Lead ECG Event Recorder, . K963725, Instromedix, Inc. CG-2211 Self Check ECG Transmitter, K012223, Card . Guard Scientific Survival, LTD 4. Intended Use: The Signalife Fidelity 200 Cardiac Event Recorder is a battery operated, single lead ECG event recorder capable of recording one,
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45-second event of ECG data for the purpose of transtelephonic transmission to a cardiac monitoring station for analysis and diagnosis by a medical professional where cardiac monitoring is
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Signalife, Inc 510(k) Summary of Safety and Effectiveness Signalife, Inc. Fidelity 200 Cardiac Event Recorder Section S
> desired by a subscriber to the service. The system includes recording of a single 45-second ECG and transtelephonic transmission of the recorded data to a monitoring station.
> The ECG recording is then transferred to another device, such as the PaceArt® System K024278 manufactured by Medtronic, Inc. for ECG analysis. The Signalife Fidelity 200 Cardiac Event Recorder is not intended to sound any physiological alarms.
> The Signalife Fidelity 200 Cardiac Event Recorder can be obtained over-the-counter (OTC) or direct-to-consumer by qualified individuals who wish to have access to a cardiac monitoring service.
#### 5. Device Description:
The device acquires an ECG signal and produces a single lead ECG. Upon user activation, an ECG signal is acquired and digitized producing a 45-second ECG recording utilizing the company's signal processing technology.
The Signalife Fidelity 200 Cardiac Event Recorder converts the signal stream into a specific data format where it is stored on a memory chip for transtelephonic transmission to and analysis by another device such as the PaceArt System K024278 manufactured by Medtronic, Inc.
Recorded data is not real time but stored for further analysis. The Signalife Fidelity 200 Cardiac Event Recorder is not intended to evaluate the signal or alarm.
The fundamental technology of the Signalife Fidelity 200 Cardiac Event Recorder is the same as that of the predicate devices. The Signalife Fidelity 200 Cardiac Event Recorder employs the company's signal processing technology to minimize noise in the ECG signal created by the ambulatory nature of the signal source.
## 6. Basis for Substantial Equivalence:
The Signalife Fidelity 200 Cardiac Event Recorder and the referenced predicates all have substantially equivalent intended use, target population, technical characteristics, performance and compliance to consensus standards for the recording and transtelephonic transmission of ECG data for analysis.
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Signalife, Inc 510(k) Summary of Safety and Effectiveness Signalife, Inc. Fidelity 200 Cardiac Event Recorder Section 5
> An examination of the differences between the Signalife Fidelity 200 Cardiac Event Recorder and the predicate devices does not raise new questions of safety or effectiveness.
It is our determination that the Fidelity 200 is safe, effective and performs within its design specifications and is substantially equivalent to the referenced predicate devices.
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Image /page/3/Picture/2 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular border with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the top half of the circle. Inside the circle is an abstract symbol resembling an eagle or bird in flight, composed of three stylized human profiles facing to the right.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
NOV 2 1 2007
Signalife, Inc. c/o Mr. William Matthews Regulatory Affairs 531 South Main St. Greenville, SC 29601
Re: K071228
Trade/Device Name: Fidelity 200 Cardiac Event Recorder Regulation Number: 21 CFR 870.2920 Regulation Name: Telephone Electrocardiograph Transmitter and Receiver Regulatory Class: Class II Product Code: DXH, DSH Dated: October 31, 2007 Received: November 1, 2007
Dear Mr. Matthews:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA), You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
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### Page 2 - Mr. William Matthews
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050. This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Center for Devices and Radiological Health's (CDRH's) Office of Compliance at (240) 276-0120. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding postmarket surveillance, please contact CDRH's Office of Surveillance and Biometric's (OSB's) Division of Postmarket Surveillance at 240-276-3474. For questions regarding the reporting of device adverse events (Medical Device Reporting (MDR)), please contact the Division of Surveillance Systems at 240-276-3464. You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (240) 276-3150 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours,
C. R. Zobel, M.D.
D. Zuckerman M.D. Director Division of Cardiovascular Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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510(k) Number (if known): K071228
Device Name: Signalife Fidelity 200 Cardiac Event Recorder
Indications for Use:
The Signalife Fidelity 200 Cardiac Event Recorder is a battery operated, user-THC Olynalifo Transmitter intended to recorder and transmitter intended to record an ECG by activated EOO overil 1866, as service. This allows users to record and transmit their ECG data to medical professionals via a communication device to a cardiac their LOO data to modified Fidelity 200 Cardiac Event Recorder is intended frionitings who are concerned about their heart rhythm and have experienced the following symptoms that are suggestive of abnormal cardiac rhythms: the following cymptonding heart (Palpitations), Heart racing or irregular pulse, Lightheadedness or Faintness, History of Arrhythmia
#### Contraindications for Use:
In order to use this service, the patient must be able to perform all of the following: Read and understand the Instructions for Use, Place the Event Recorder on their chest and hold it steadily for at least 45 seconds, Hear the indicator beeps, Speak and understand English, Operate a telephone, Operate a simple, push button device. Due to the possible seriousness of the abnormal heart rhythms that can be associated with these conditions, persons who have been diagnosed with the following conditions should consult their physician before using this service: Blockage of the arteries of the heart, Heart valve problems, Heart transplant, Congestive heart failure, Loss of consciousness. If the user has any of these conditions, Signalife will need to obtain authorization from their physician before enrollment in the service.
Prescription Use (Part 21 CFR 801 Subpart D) AND/OR
Over-The-Counter Use (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE -- CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Mesa May for DOT
(Division Sign-Off)
Division of Cardiovascular
the Vascular Devices
510(k) Number K071228
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Warning: This device is not designed to be used with pacemakers or defibrillators. If the user has either of these, they will not be allowed to enroll in this service. The Signalife Fidelity 200 Cardiac Event Recorder cannot predict or diagnose a heart attack or be used for chest pain monitoring and is not a allegriese a nount attention. This device is for monitoring purposes only and has no therapeutic value. It provides the individual access to cardiac monitoring services.
Need for Signed Subscriber Agreement: Your agreement indicates you understand that Signalife (or affiliate) will contact your physician to verify in writing that you are their patient and that they are willing to be contacted in cases where there are clinically significant events involving your care. Your agreement indicates you understand that if written verification is not received from your physician within 35 days of your enrollment, you will not be able to utilize any aspects of the Signalife (or affiliate) service until such verification is received by Signalife (or affiliate). Your agreement certifies you understand that this service is not a substitute for physician care and that this is only a screening service. Signalife, Inc Indications for Use Signalife Model 200 Cardiac Event Recorder
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Two short videos show you everything — or skip straight to the written tutorial if you'd rather read. You can reopen this any time from the Tutorial button in the top bar.
Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.