The EnSite Multi-electrode Diagnostic Catheter used with the EnSite 3000 Electrophysiology Workstation is intended to be used in the right atrium of patients with complex arrhythmias that may be difficult to identify using conventional mapping systems alone (i.e., linear mapping catheters) .
Device Story
The EnSite 3000 System consists of a 9 French multi-electrode diagnostic catheter and an electrophysiology workstation. The catheter, deployed in the right atrium, features a distal balloon/braid multi-electrode array (MEA) and three ring electrodes; it does not require direct endocardial contact. The Patient Interface Unit collects intracardiac signals from the MEA and other standard EP lab equipment (ECG leads, stimulators), converting them to digital signals. The Silicon Graphics Octane workstation processes these signals using proprietary algorithms to reconstruct and display right atrial endocardiograms. Used in the EP laboratory by physicians, the system assists in diagnosing complex arrhythmias by providing non-contact mapping. The output allows clinicians to visualize cardiac electrical activity, aiding in the identification of arrhythmia substrates. Benefits include improved diagnostic capability for complex cases compared to conventional contact mapping.
Clinical Evidence
Clinical studies demonstrated the system is as safe and effective as currently marketed EP mapping catheter systems. Results indicate the system successfully maps complex atrial arrhythmias. Supporting evidence includes in vitro bench testing (tensile, torsion, inflation/deflation), biocompatibility testing per ISO 10993, and animal studies confirming initial system safety.
Technological Characteristics
System comprises a 9 French percutaneous catheter with a distal balloon/braid multi-electrode array (MEA) and three ring electrodes. Catheter shaft is coaxial polyurethane. Workstation utilizes a Silicon Graphics Octane processor. Sensing principle: non-contact intracardiac electrogram reconstruction via proprietary software algorithms. Connectivity: accepts analog inputs from standard EP lab equipment. Conforms to IEC 601-1 and IEC 601-2-27. Biocompatible materials used for blood-contacting surfaces.
Indications for Use
Indicated for patients with complex arrhythmias requiring right atrial electrophysiology procedures that are difficult to identify using conventional contact mapping catheters.
Regulatory Classification
Identification
An electrode recording catheter or an electrode recording probe is a device used to detect an intracardiac electrocardiogram, or to detect cardiac output or left-to-right heart shunts. The device may be unipolar or multipolar for electrocardiogram detection, or may be a platinum-tipped catheter which senses the presence of a special indicator for cardiac output or left-to-right heart shunt determinations.
Predicate Devices
EP Technologies, Inc. Asymmetric Curve Steerocath
Biosense CARTO System
Submission Summary (Full Text)
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#### 18. CERTIFICATIONS AND SUMMARIES
# 18.1 Summary for Public Disclosure
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# 510(k) Summary
| Submitter: | Andrew Balo<br>Vice President Regulatory Affairs, Quality Assurance, Clinical Affairs<br>1350 Energy Lane Suite 110<br>St. Paul, MN 55401 |
|-----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Contact: | Andrew Balo<br>Vice President Regulatory Affairs, Quality Assurance, Clinical Affairs |
| Date Prepared: | September 25, 1998 |
| Trade Name: | EnSite 3000 System |
| | a) Model EC 1000 EnSite Multi-electrode Diagnostic Catheter<br>b) EnSite 3000 electrophysiology workstation |
| Common name: | Electrophysiology cardiac mapping system |
| | a) Electrode recording catheter or electrode recording probe<br>(21CFR 870.1220) |
| | b) Programmable diagnostic computer (21 CFR 870.1425) |
| Equivalence to: | a) EP Technologies, Inc. Asymmetric Curve Steerocath<br>and other similar recording catheters. |
| | b) Biosense CARTO System and other similar programmable<br>diagnostic computer |
| Description: | EnSite 3000 System Components |
| | EnSite Multi-electrode Diagnostic Catheter |
| | The EnSite Multi-electrode Diagnostic Catheter (EnSite catheter) is a<br>single use, 9 French, percutaneous catheter. The EnSite catheter is<br>designed for use only with the EnSite 3000 electrophysiology laboratory<br>and for deployment in the right atrium. The proximal end contains the<br>patient cable electrical connector, an inflation port for the distal balloon/<br>braid multi-electrode array (MEA), luer port compatible with a 0.035"<br>guidewire, and a push shaft to facilitate expansion and deployment of the<br>MEA. The shaft is a coaxial design with a polyurethane outer sheath. At |
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the distal end in addition to the MEA, there are three ring electrodes, one distal and two proximal mounted at specific locations to the MEA. The tip of the catheter is a pigtail shape to minimize trauma to the endocardium. Biocompatible materials are used for all blood contacting surfaces.
EnSite 3000 electrophysiology workstation
The EnSite 3000 electrophysiology workstation is a computerized storage and display system for use in electrophysiology studies of the human heart. It is designed for use in the EP laboratory with the EnSite Multielectrode Diagnostic Catheter and in conjunction with other standard equipment found in the EP laboratory. This allows for the collection , storage, and display of intracardiac electrograms. The EnSite 3000 may be used in conjunction with standard electrode mapping catheters, programmable cardiac stimulators, ECG leads and other analog inputs.
The EnSite 3000 is comprised of a display workstation consisting of a Silicon Graphics Octane processor containing proprietary software and a 21" monitor and a Patient Interface Unit which accepts the signals from the patient and from other accessories and converts them to digital signal and sends them to the display workstation for processing.
### Intended use:
For use in right atrial electrophysiology procedures to assist in the diagnosis of complex arrhythmias that may be difficult to identify using conventional mapping systems alone (i.e. contact mapping catheters)
### Technological Characteristics:
Unlike currently available electrode recording catheters, the EnSite catheter does not require direct contact with the endocardium for the detection of intracardiac electrograms. The EnSite 3000 connected to the EnSite catheter utilizes proprietary software algorithms to reconstruct and display right atrial endocardiograms detected by the EnSite catheters MEA.
### Non-clinical performance data:
The EnSite catheter underwent a battery of in vitro tests including tensile, torsion, inflation, deflation testing. Biocompatibility was confirmed in accordance with ISO 10993.
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The EnSite 3000 was tested and conforms to IEC 601-1 and IEC 601-2-27 international standards. Device validation testing was conducted in accordance with in house procedures.
Animal studies were utilized to show initial catheter and system safety of the catheter.
# Clinical Data:
Clinical studies were conducted which demonstrate that the EnSite 3000 System is as safe and effective as EP mapping catherer systems presently marketed. The results indicate that it can map complex atrial arrhythmias.
#### Conclusion:
An evaluation of the predicate devices, in vitro testing, animal testing and human clinical testing shows that the EnSite 3000 and the EnSite Multielectrode Diagnostic Catheter are substantially equivalent to currently marketed programmable diagnostic computers and electrode recording catheters.
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Image /page/4/Picture/1 description: The image shows the seal of the Department of Health & Human Services - USA. The seal is circular and contains the words "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" around the perimeter. Inside the circle is an abstract image of an eagle.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
APR 21 1999
Mr. Andrew Balo Vice President, Regulatory, Clinical Affairs and Quality Assurance Endocardial Solutions, Inc. 1350 Energy Lane, Suite 110 Saint Paul, MN 55108-5254
Re : K983456 EnSite™ Multi-Electrode Diagnostic Catheter and EnSite 3000™ Electrophysiology Workstation Regulatory Class: II (two) Product Code: MTD, DQK Dated: January 29, 1999 Received: January 29, 1999
Dear Mr. Balo:
We have reviewed your Section 510(k) notification of intent to market we have referenced above and we have determined the device is che device researcedent (for the indications for use stated in the substanctarly equivalent (195 predicate devices marketed in interstate enclosure) to regarly manisose, the enactment date of the Medical Device Commerce provices that have been reclassified in accordance with Amendmenton) of the Federal Food, Drug, and Cosmetic Act (Act). You may, therefore, market the device, subject to the general controls may, bronsions, m act and the limitations described below. The general provisions of the Act include requirements for annual controls provibient of exices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.
The Office of Device Evaluation has determined that there is a file of better of between this device will be used for an intended use readonable in the proposed labeling and that such use could cause Therefore, in accordance with Section 513(1) (1) (E) of the Act, harm. the following limitation must appear in the Warnings section of the device's labeling:
The use of this device in conjunction with radiofrequency WARNING: ablation, as a part of the diagnosis and treatment of cardiac arrhythmias, may pose an increased risk of adverse events such as cardiac perforation, myocardial infarction, air embolism, and hematoma requiring surgical repair and/or blood transfusion.
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Page 2 - Mr. Andrew Balo
The warning should appear in a black box, and the font size of the text should be at least 2 points larger than any surrounding text. The should be at read be present on the first page of your Catheter Instructions warning mire be the packaging for each individual catheter.
If your device is classified (see above) into either class II (Special It your dovied be suit (Premarket Approval), it may be subject to such editional controls. Existing major regulations affecting your device auditional controle Code of Federal Regulations, Title 21, Parts 800 to - cound in one in one mination assumes compliance with 895. 693. "A Subscancially Practice requirements, as set forth in the Quality System Regulation (QS) for Medical Devices: General che Quartly Sybecal Regulation (1), and that, through periodic QS inspections, the Food and Drug Administration (FDA) will verify such assumptions. ens we to comply with the GMP regulation may result in regulatory In addition, FDA may publish further announcements concerning action. accon. your device in the found in the comment offect any obligation you premaired nocerritues of through 542 of the Act for devices under Might have and and Doubt Radiation Control provisions, or other Federal laws or regulations.
The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and permits your device to proceed to the market. This letter will allow you to begin marketing your device as described in your 510(k) premarket notification if the limitation statement above is added to your labeling, as described.
Please note that the above labeling limitations are required by Section 513(i)(1)(E) of the Act. Therefore, a new 510(k) is required before these limitations are modified in any way or removed from the device's labeling.
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Page 3 - Mr. Andrew Balo
If you desire specific information about the application of other labeling requirements to your device (21 CFR Part 801 and additionally 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4646. Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, " Misbranding by reference to premarket notification" (21 CFR 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address "http://www.fda.gov/cdrh/dsma/dsmamain.html".
sincerely yours
Susan Alpert, Ph.D., M.D.
Susan Alpert, Ph.D Director Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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Page 5 - Mr. Andrew Balo
Page_ 1
510 (k) Number (if known) : __________________________________________________________________________________________________________________________________________________
Device Name:_EnSite ™ Multi-Electrode Diagnostic Catheter and EnSite 3000 ™ Electrophysiology Workstation
FDA's Statement of the Indications For Use for device:
The EnSite Multi-electrode Diagnostic Catheter used with the EnSite 3000 Electrophysiology Workstation is intended to be used in the right atrium of patients with complex arrhythmias that may be difficult to identify using conventional mapping systems alone (i.e., linear mapping catheters) .
Prescription Use
(Per 21 CFR 801.109)
X. Balle T.ll
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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.
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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).
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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.
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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.
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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.
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Reading rule for every project: how many summaries do you read in full?
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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.
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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.
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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.
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Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
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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.
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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.