MCT Mode: For use on adult patients who experience transient or non-transient symptoms that may suggest cardiac arrhythmias. The arrhythmia detector and alarm device monitors an electrocardiogram and is designed to produce a visible notification when Ventricular Fibrillation/Flutter, Atrial Fibrillation/Flutter, Pause (Asystole), Bradycardia, or Tachycardia occurs.
Holter Mode: For use on adult patients experiencing palpitations, syncope, dizziness, arrhythmia, bradycardia, tachycardia, angina, ischemia and paced ECG.
Multi-Lead (Resting EKG) Mode: For use on adult patients for acquiring, storing and viewing/printing of up to twelve (12) leads of patient ECG waveforms through surface electrodes adhered to the patient's body.
The intended use locations for CardiacLinx are in a physician's office, hospital or rehabilitation facilities, patient's home, or similar use areas. It is intended to be used by or on the order of a physician or similarly qualified health care professional.
For general hospital or clinical use by medical professionals whenever an assessment of a patient's ambulatory ECG data is required. Allows for a trained physician or health care professional to download and analyze the data for review and to produce printed reports. This will enable the evaluation of arrhythmias, ischemic attacks, reporting of PQRST intervals, clinical and epidemiological research studies, evaluation of a patient response after resuming occupational or recreational activities (e.g., after myocardial infarction or cardiac surgery), and/or evaluation of patients with pacemakers. CardiacLinx is only available for use upon the order of a physician or other related licensed medical professional.
For use under the supervision of a qualified physician trained in ECG interpretation to record the electrical activity of the heart for the purpose of correlating resultant waveforms with the health of the heart muscle tissue structures.

Device Description

The CardiacLinx System is a continuous real-time ECG monitor and arrhythmia detector. It is a multipurpose device designed with the ability to collect ECG data from the patient in order to perform:

2-lead Mobile Cardiac Outpatient Telemetry (MCT) for up to 30 days;
24 hour or longer 3-lead Holter monitoring; or
Resting 12-lead ECG with interpretation.

The ambulatory device may be used on an outpatient basis with remote clinician data analysis whenever it is required to assess a patient's ambulatory ECG data (MCT and Holter modes), as well as for use within the physician office setting by the medical professional (resting 12-lead mode).

The product consists of monitoring equipment worn by the patient that transmits all asymptomatic and symptomatic events to a central computer monitoring center in the outpatient setting. The central computer monitoring center is equipped with personal computers running CardiacLinx System software intended for use only by qualified medical professionals and their staff.

CardiacLinx is comprised of three (3) main software components developed by Ross Medical Technology, consisting of:

The Ross Medical Technology PMD Software that can be run on a Personal Mobile Device ("PMD") with Bluetooth capabilities and a built-in cellular modem. The Personal Mobile Device is configured to process and transmit signals from an FDA cleared patient-worn ECG Monitor (also with Bluetooth capabilities);
The Ross Medical Technology MCT Server Software that can be run on a central server that receives, interprets (using embedded algorithms), and stores the ECG data from the PMD Software; and
The Ross Medical Technology MCT Client Software that can be run at a central computer monitoring center attended by trained medical professionals who can view the ECG data and interpretations.

In addition to the three main software components manufactured by Ross Medical Technology. CardiacLinx includes third party components that are necessary to complete the functionality of the device. These third party components are:

An FDA cleared patient-worn ECG Monitor;
A Personal Mobile Device with Bluetooth capabilities and built-in cellular modem; and
Two embedded ECG Interpretation Algorithms found in other FDA cleared ECG analysis devices.

The CardiacLinx device integrates these third party components with RMT's proprietary software.

AI/ML Overview

Here's a breakdown of the acceptance criteria and the study details for the CardiacLinx device, based on the provided text:

1. Table of Acceptance Criteria and Reported Device Performance

Acceptance Criteria (What was tested)	Reported Device Performance
Ambulatory and Home Environment Interference: To determine if ambulatory and home environments would produce a clinically significant change in ECG interpretation due to electronic sources and motion artifacts.	Device performed as intended. 100 out of 100 samples in each test (1,000 out of 1,000 total samples) showed identical clinical interpretation from two independent board-certified physicians.
Data Transmission: Reliability of data transmission from PMD to MCT Server Software.	97.00% of data packets received by the MCT Server Software between 0 and 5 seconds.

2. Sample Size Used for the Test Set and Data Provenance

Sample Size for Ambulatory and Home Environment Interference Test: 1,000 total samples (100 samples in each of 10 tests, although the type of "each test" is not specified beyond "electronic sources and motion").
Data Provenance: The document does not explicitly state the country of origin or whether the data was retrospective or prospective for this specific test. It was conducted by Ross Medical Technology itself to "further demonstrate the effectiveness," suggesting it's likely proprietary and possibly prospective within their testing framework, but this is an inference.

3. Number of Experts Used to Establish Ground Truth for the Test Set and Their Qualifications

Number of Experts: Two independent board-certified physicians.
Qualifications of Experts: Board-certified physicians. (Additional specializations like "radiologist" are not applicable here as it's ECG interpretation).

4. Adjudication Method for the Test Set

Adjudication Method: The text states, "showed identical clinical interpretation from two independent board certified physicians." This implies consensus (100% agreement) was the adjudication method for determining "identical clinical interpretation." No explicit adjudication method like "2+1" or "3+1" is mentioned, as complete agreement was achieved.

5. If a Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study Was Done

Was an MRMC study done? No. The performance data presented focuses on standalone device performance and agreement with expert interpretation, not a comparative effectiveness study showing human reader improvement with or without AI assistance.

6. If a Standalone (i.e., algorithm only without human-in-the-loop performance) Was Done

Was a standalone study done? Partially. The "Ambulatory and Home Environment Interference" test evaluates the device's ability to produce "identical clinical interpretation" when compared to human experts. While human experts are involved in verifying the output, the core of this test is assessing whether the device's output (which relies on its embedded algorithms) remains consistent and accurate in challenging environments. The test specifically states, "Device performed as intended. ... showed identical clinical interpretation," implying the device's interpretation was consistent with the experts rather than the experts acting as an "in-the-loop" component to improve the device's performance. The "Data Transmission" test is purely standalone algorithm/system performance.
The device integrates "Two embedded ECG Interpretation Algorithms found in other FDA cleared ECG analysis devices" and the "MCT Server Software ... interprets the ECG data using the embedded ECG Interpretation Algorithms." This strongly indicates standalone algorithmic interpretation is a core function being evaluated.

7. The Type of Ground Truth Used

Ground Truth Type: Expert consensus. For the "Ambulatory and Home Environment Interference" test, "identical clinical interpretation from two independent board certified physicians" served as the benchmark against which the device's performance was measured.

8. The Sample Size for the Training Set

Training Set Sample Size: The document does not provide information about the training set size for the embedded ECG interpretation algorithms. It mentions that the device uses "Two embedded ECG Interpretation Algorithms found in other FDA cleared ECG analysis devices," implying these algorithms were developed and trained independently prior to their integration into CardiacLinx, and their training data is not part of this submission. Ross Medical Technology did not develop these algorithms.

9. How the Ground Truth for the Training Set Was Established

Training Set Ground Truth Establishment: Similar to the training set size, the document does not specify how the ground truth was established for the training data of the "embedded ECG Interpretation Algorithms" as these are third-party components.

Summary

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Image /page/0/Picture/13 description: The image shows the logo for the Department of Health & Human Services - USA. The logo is circular, with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. In the center of the circle is an abstract symbol that resembles a stylized human figure or head in profile.

Public Health Service

Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002

March 12, 2015

Ross Medical Technology, Inc. Alexander Chiu President 82 E. Allendale Road, Suite 8a Saddle River, New Jersey 07458

Re: K142352

Trade/Device Name: CardiacLinx Regulation Number: 21 CFR 870.1025 Regulation Name: Arrhythmia Detector and Alarm (Including ST-Segment Measurement and Alarm) Regulatory Class: Class II

Product Code: DSI, DPS, DOK Dated: February 12, 2015 Received: February 13, 2015

Dear Alexander Chiu,

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. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.

If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to 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.

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

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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); medical device reporting of medical devicerelated adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in the quality systems (OS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.

If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address

http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to

http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.

You may obtain other general information on your responsibilities under the Act from the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address

http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.

Sincerely vours.

Mitchell Stein

for Bram D. Zuckerman, M.D. Director Division of Cardiovascular Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

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Section 4: Indications for Use Statement

510(k) Number (if known): K142352

Device Name: CardiacLinx

Indications for Use:

The following Indications for Use are identified for the CardiacLinx device:

1. MCT Mode: For use on adult patients who experience transient or non-transient symptoms that may suggest cardiac arrhythmias. The arrhythmia detector and alarm device monitors an electrocardiogram and is designed to produce a visible notification when Ventricular Fibrillation/Flutter, Atrial Fibrillation/Flutter, Pause (Asystole), Bradycardia, or Tachycardia occurs.
1. Holter Mode: For use on adult patients experiencing palpitations, syncope, dizziness, arrhythmia, bradycardia, tachycardia, angina, ischemia and paced ECG.
1. Multi-Lead (Resting EKG) Mode: For use on adult patients for acquiring, storing and viewing/printing of up to twelve (12) leads of patient ECG waveforms through surface electrodes adhered to the patient's body.
1. The intended use locations for CardiacLinx are in a physician's office, hospital or rehabilitation facilities, patient's home, or similar use areas. It is intended to be used by or on the order of a physician or similarly qualified health care professional.
1. For general hospital or clinical use by medical professionals whenever an assessment of a patient's ambulatory ECG data is required. Allows for a trained physician or health care professional to download and analyze the data for review and to produce printed reports. This will enable the evaluation of arrhythmias, ischemic attacks, reporting of PQRST intervals, clinical and epidemiological research studies, evaluation of a patient response after resuming occupational or recreational activities (e.g., after myocardial infarction or cardiac surgery), and/or evaluation of patients with pacemakers. CardiacLinx is only available for use upon the order of a physician or other related licensed medical professional.
1. For use under the supervision of a qualified physician trained in ECG interpretation to record the electrical activity of the heart for the purpose of correlating resultant waveforms with the health of the heart muscle tissue structures.

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Contraindications for Use:

CardiacLinx is not indicated for use by patients with potentially life-threatening arrhythmias who require inpatient monitoring and/or patients whom the attending physician recommends hospitalization.

Prescription Use ___X (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)

For Concurrence of CDRH, Office of Device Evaluation (ODE)

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Image /page/4/Picture/0 description: The image shows the logo for Ross Medical Technology. The logo has the word "ROSS" in gray and the word "MEDICAL" in light blue. Underneath the two words is a light blue line with a heartbeat symbol in the middle. Underneath the line is the word "TECHNOLOGY" in light blue.

Section 5: 510(k) Summary

Submitter

Company:	Ross Medical Technology, Inc.
Address:	82 E. Allendale Road, Suite 8A Saddle River, NJ 07458
Contact:	Dr. Alexander Chiu
Phone:	973-874-9711
Fax:	510-629-6090
E-mail:	chiu@rossmedco.com
Date Prepared:	August 20, 2014

Device

Trade Name:	CardiacLinx
Common Name:	Arrhythmia detector and alarm
Classification:	Detector and alarm, arrhythmia
Product Code:	DSI, DPS, DQK
Regulation:	870.1025, 870.2340, 870.1425
Class:	II, Special Controls

Predicate Devices

The following FDA cleared devices have been selected by Ross Medical Technology, Inc. ("RMT") as predicate devices of CardiacLinx in order to demonstrate substantial equivalence:

1. Applied Cardiac Systems Cardiac Outpatient Real-time ECG (CORE™) (herein, "The CORE"), cleared by the FDA under 510(k) number K103706; Product Classification Code DSI; Regulation 870.1025.
1. Pulse Biomedical, Inc. ("PBI") QRS Card™ S-T Segment Analysis Patient Monitoring System Modification (Device Trade Name "QRS Card BT"), cleared by the FDA under 510(k) number K100813; Product Classification Code DPS; Regulation 870.2340.
1. PBI Cardiology Suite 4.0TM Ambulatory ECG Analysis System (herein, "PBI Cardiology Suite"), cleared by the FDA under 510(k) number K042799; Product Classification Code DQK; Regulation 870.1425.
1. Cardiac Science Corporation Atria 3100/6100 (herein, "Atria 3100/6100"), cleared by the FDA under 510(k) number K060167; Product Classification Code DPS; Regulation 870.2340.

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Image /page/5/Picture/0 description: The image shows the logo for Ross Medical Technology. The word "ROSS" is in a serif font and is in gray. To the right of the word "ROSS" is the word "MEDICAL" in a sans-serif font and in light blue. Underneath the words "ROSS MEDICAL" is the word "TECHNOLOGY" in a smaller sans-serif font and in gray.

Device Description

The CardiacLinx System is a continuous real-time ECG monitor and arrhythmia detector. It is a multipurpose device designed with the ability to collect ECG data from the patient in order to perform:

1. 2-lead Mobile Cardiac Outpatient Telemetry (MCT) for up to 30 days;
1. 24 hour or longer 3-lead Holter monitoring; or
1. Resting 12-lead ECG with interpretation.

CardiacLinx is comprised of three (3) main software components developed by Ross Medical Technology, consisting of:

1. The Ross Medical Technology PMD Software that can be run on a Personal Mobile Device ("PMD") with Bluetooth capabilities and a built-in cellular modem. The Personal Mobile Device is configured to process and transmit signals from an FDA cleared patient-worn ECG Monitor (also with Bluetooth capabilities);
1. The Ross Medical Technology MCT Server Software that can be run on a central server that receives, interprets (using embedded algorithms), and stores the ECG data from the PMD Software; and
1. The Ross Medical Technology MCT Client Software that can be run at a central computer monitoring center attended by trained medical professionals who can view the ECG data and interpretations.

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Image /page/6/Picture/0 description: The image shows the logo for Ross Medical Technology. The word "ROSS" is in gray, and the word "MEDICAL" is in light blue. Underneath the words, there is a light blue line with a heartbeat symbol in the middle. Underneath the line, the word "TECHNOLOGY" is in light blue.

1. An FDA cleared patient-worn ECG Monitor;
1. A Personal Mobile Device with Bluetooth capabilities and built-in cellular modem; and
1. Two embedded ECG Interpretation Algorithms found in other FDA cleared ECG analysis devices.

The CardiacLinx device integrates these third party components with RMT's proprietary software.

Principles of Operation

The CardiacLinx System operates as follows:

1. Sensors attached to the patient's chest capture the heart signals of the patient.
1. The ECG Monitor connected to the sensors converts the heart signals to data and transmits it to the Bluetooth enabled Personal Mobile Device.
1. The PMD Software embedded on the Personal Mobile Device transmits the ECG data to the MCT Server Software via 3G, 4G, or Wi-Fi cellular networks.
1. The MCT Server Software interprets the ECG data using the embedded ECG Interpretation Algorithms and stores both the ECG data and interpretations in a database.
1. Technicians and/or physicians can monitor the heart signals of the patients in real-time using the MCT Client Software. The automatic interpretations can be viewed to assist in diagnosis and treatment plans.
1. The MCT Client Software is also used to manage Patients, Prescriptions, and Users of the System, as well as to produce Prescription Reports and MCT and Holter export records, if needed.

ECG data from all 12 leads are transmitted to the CardiacLinx MCT Server Software at all times while a prescription is active. Using this data, the MCT Client Software can produce three different final reports. These three reporting options can be chosen by the CardiacLinx MCT Client Software user, and represent the three different configurations below:

3 wire, ambulatory, grip electrode cable with signals from 1 or 2 leads, representing MCT Mode
A 5 wire, ambulatory, grip electrode cable with signals from 3 leads, representing Holter Mode
് 10 wire, resting, grip electrode cable with signals from 12 leads, representing Resting Mode (8 channels; derived leads III, aVF, aVR, aVL)

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There is no need to change the electrode wire configuration on the patient; all 10 wires will remain connected to the patient and all data will continuously transmit to the CardiacLinx MCT Server Software. The MCT Client Software user simply chooses which report to generate and has all data necessary to produce any report. For Resting Mode, although it is not clinically required for the Patient to be "resting", it is the nonetheless the User's (or medical provider's, or both) responsibility to determine if the patient is in the proper state to allow for a clinically acceptable ECG signal for a ten (10) second time frame.

Intended Use

The CardiacLinx System is intended for outpatient use with remote clinician data analysis as well as for use within the physician office setting by the medical professional, or whenever it is required to assess a patient's ambulatory ECG data. This product allows a trained physician or healthcare professional to analyze continuous and intermittent measurements of heart rate and rhythm over several days. All asymptomatic events are transmitted to a central computer in the outpatient setting. This will enable the evaluation and documentation of arrhythmias, ischemic attacks, PQRST intervals, clinical and epidemiological research studies, and/or the evaluation of a patient's response after resuming occupational or recreational activities. The MCT, and resting 12-lead ECG modes are intended for use on adult patients only on the order of a physician or related licensed medical professional.

Indications for Use

The following Indications for Use are identified for the CardiacLinx device:

1. MCT Mode: For use on adult patients who experience transient or non-transient symptoms that may suggest cardiac arrhythmias. The arrhythmia detector and alarm device monitors an electrocardiogram and is designed to produce a visible notification when Ventricular Fibrillation/Flutter, Atrial Fibrillation/Flutter, Pause (Asystole), Bradycardia, or Tachycardia occurs.
1. Holter Mode: For use on adult patients experiencing palpitations, syncope, dizziness, arrhythmia, bradycardia, tachycardia, angina, ischemia and paced ECG.
1. Multi-Lead (Resting EKG) Mode: For use on adult patients for acquiring, storing and viewing/printing of up to twelve (12) leads of patient ECG waveforms through surface electrodes adhered to the patient's body.
1. The intended use locations for CardiacLinx are in a physician's office, hospital or rehabilitation facilities, patient's home, or similar use areas. It is intended to be used by or on the order of a physician or similarly qualified health care professional.

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Image /page/8/Picture/0 description: The image shows the logo for Ross Medical Technology. The word "ROSS" is in gray, and the word "MEDICAL" is in blue. Underneath the two words is a blue line that resembles an EKG. Underneath the line is the word "TECHNOLOGY" in a smaller, light gray font.

1. For general hospital or clinical use by medical professionals whenever an assessment of a patient's ambulatory ECG data is required. Allows for a trained physician or health care professional to download and analyze the data for review and to produce printed reports. This will enable the evaluation of arrhythmias, ischemic attacks, reporting of PORST intervals, clinical and epidemiological research studies, evaluation of a patient response after resuming occupational or recreational activities (e.g., after myocardial infarction or cardiac surgery), and/or evaluation of patients with pacemakers. CardiacLinx is only available for use upon the order of a physician or other related licensed medical professional.
1. For use under the supervision of a qualified physician trained in ECG interpretation to record the electrical activity of the heart for the purpose of correlating resultant waveforms with the health of the heart muscle tissue structures.

Contraindications for Use

Comparison of Technological Characteristics

A comparison of the technological characteristics between the CORE predicate device and the CardiacLinx device will be summarized here. Additional comparisons and further detail is provided in Section 12 of this 510(k) Premarket Notification.

In regards to the CORE, RMT makes the following observations and conclusions in comparing the technology and performance characteristics of the two devices.

1. The CORE offers multiple electrode configurations, whereas the CardiacLinx device is intended to have all 10 electrodes attached to the patient regardless of mode. This does not affect safety and effectiveness when compared to the CORE.
1. CardiacLinx does not have a manual trigger.
1. ECG Algorithms differ between two devices, with CardiacLinx appearing to offer a more robust library of ECG interpretations.
1. Physical differences between the two devices are inconsequential.
1. Both devices can operate within their Intended Use based on performance specifications.

RMT believes that the CardiacLinx device has essentially the same technology and performance characteristics as the CORE and is therefore substantially equivalent the CORE.

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Image /page/9/Picture/0 description: The image shows the logo for Ross Medical Technology. The word "ROSS" is in a dark gray font, while "MEDICAL TECHNOLOGY" is in a light blue font. A blue line runs underneath the word "ROSS" and extends to the right, underneath the word "MEDICAL".

Performance Data

The following performance data are provided in support of the substantial equivalence determination made by Ross Medical Technology, Inc. for its CardiacLinx device.

Software Verification and Validation Testing

Software verification and validation testing were conducted and documentation is provided pursuant to FDA's Guidance for Industry and FDA Staff, "Guidance for the Content of Premarket Submissions for Software Contained in Medical Devices" (the "Software Guidance"). As discussed in Section 16 of the 510(k) Premarket Notification, the CardiacLinx System software was found to have a "Moderate" level of concern based on FDA's guidance document. A failure or latent flaw in the CardiacLinx System's software could directly result in a minor injury to the Patient. As a result, the software documentation provided in the 510(k) Premarket Notification will be commensurate with this Moderate Level of Concern classification as outlined in the Software Guidance.

Electrical Safety and Electromagnetic Compatibility

Ross Medical Technology, Inc. is citing the electrical safety and electromagnetic compatibility (EMC) testing already performed on the FDA cleared components of the CardiacLinx System. These components of the CardiacLinx System are in compliance with the following standards for electrical safety and electromagnetic compatibility:

1. ANSI/AAMI EC11:1991/(R) 2001, Diagnostic electrocardiograph devices.
1. EN 60601-1:2006; Medical electrical equipment Part 1: General requirements for basic safety and essential performance.
1. EN 60601-1-2:2007; Medical electrical equipment Part 1-2: General requirements for basic safety and essential performance - Collateral standard: Electromagnetic compatibility -Requirements and tests.
1. EN 60601-2-25:1995; Medical electrical equipment Part 2-25: Particular requirements for basic safety and essential performance of electrocardiographs.

Section 17 of the 510(k) Premarket Notification discusses electrical safety and EMC in more detail.

Additional Testing

To further demonstrate the effectiveness of the CardiacLinx System, RMT conducted additional tests that go beyond the testing discussed above. Table 5.1 below summarizes the additional tests that RMT performed on the CardiacLinx System.

Through the FDA's Pre-Submission process (Q130826), and documented in the approved meeting minutes (0130826/A001), it was determined that additional testing may be done for the expanded indication for use of the FDA cleared ECG Monitor to include the ambulatory and home environment. RMT conducted the Ambulatory and Home Environment Interference test (summarized below) to determine any clinically significant differences in ECG interpretation when

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the CardiacLinx system is used in the ambulatory and home environment. Special consideration in this test was given to test clinically significant artifacts from electronic sources and motion.

Test Name	RMT Document Ref.	Purpose of Test	Results of Test	Comments
Ambulatoryand HomeEnvironmentInterference	INTE-RMT-0201	To test whetherambulatory and homeenvironments wouldproduce a clinicallysignificant change inECG interpretation.	Device performed as intended.100 out of 100 samples in each test(1,000 out of 1,000 total samples)showed identical clinicalinterpretation from twoindependent board certifiedphysicians.	Test Reportprovided inSection 18
DataTransmission	SWTP-RMT-0205	Test reliability of datatransmission from PMDto MCT Server Software.	97.00% of data packets received bythe MCT Server Software between0 and 5 seconds.	Test Reportprovided inSection 18

Table 5.1: Additional Testing Performed

Substantial Equivalence Conclusion

The CardiacLinx device essentially has the same intended use, operating principles, and technical characteristics as the predicate devices. The FDA cleared components of the CardiacLinx System are unchanged. Standards testing cited by RMT is substantially equivalent to standards testing performed on the predicate devices, and in some cases identical.

Any differences in Intended Use, Indications for Use, technology, performance, or testing between the predicate devices and CardiacLinx are adequately explained and justified. These differences do not pose additional concerns related to the safety and effectiveness of the CardiacLinx device. Supplemental tests and information is provided in the 510/k) Premarket Notificiently justify this claim, with specific attention brought to Sections 16, 17, and 18 of this Premarket Notification. In Sections 17 and 18, concerns about using the ECG Monitor in the ambulatory and home environment are addressed and alleviated.

Based on the comparisons made to the predicate devices and the supplemental data provided, the CardiacLinx device is substantially equivalent to the predicate devices.

Regulation Number and Section

§ 870.1025 Arrhythmia detector and alarm (including ST-segment measurement and alarm).

(a)
Identification. The arrhythmia detector and alarm device monitors an electrocardiogram and is designed to produce a visible or audible signal or alarm when atrial or ventricular arrhythmia, such as premature contraction or ventricular fibrillation, occurs.(b)
Classification. Class II (special controls). The guidance document entitled “Class II Special Controls Guidance Document: Arrhythmia Detector and Alarm” will serve as the special control. See § 870.1 for the availability of this guidance document.