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General Information

  • What is an ECG/EKG?
    An electrocardiogram (ECG or EKG) is a simple, non-invasive, and painless test that records the electrical activity in your heart. ECGs are used to check for signs of heart disease.
  • What is the difference between a single lead (1-lead) and a 12-lead ECG?
    A single-lead ECG is used for arrhythmia detection and basic heart monitoring. A 12-lead ECG is used to provide a comprehensive view of the heart and is the medical standard for screening and diagnosing various heart conditions. A 12-lead ECG is often used to detect or diagnose arrhythmias, heart attacks, drug effects on the heart, and many other heart diseases.
  • What is PCA 500?
    PCA 500 is the first and only FDA-cleared, hospital quality 12-lead electrocardiogram (ECG) for professional and personal use. PCA 500 combines hospital grade accuracy, mobile technology, advanced software and cloud-based management to set a new standard in ECGs. Our ECG platform enables millions of patients to monitor their heart health from the comfort of their homes.
  • How does PCA 500 work?
    PCA 500 connects to our prepositioned electrode strip and then pairs via bluetooth to a compatible smartphone or tablet. QT ECG, a free mobile app (downloadable on Apple Store or Google Play) allows you to record and upload your ECG to the secure cloud. Your physician can access your ECG remotely provide you with a report and suggest a course of action if needed. The PCA 500 provides unparalleled convenience, accessibility, and quality to cardiac care. For a quick video demonstrating how to use the device, please go to "How PCA Works?" under "For Patients" tab.
  • For whom is PCA 500 appropriate?
    PCA 500 is intended for the millions of people who suffer from chronic heart disease. PCA 500 is mostly used for quick and accurate clarification of unclear symptoms and for the prevention of life-threatening events. For patients who just had surgery, a stent placed, or an ablation procedure, PCA 500 may be useful for follow up and detecting changes. It is also designed for home use by patients with chronic heart failure and arrhythmias. PCA 500 also has applications in preventive medicine. For more information about specific areas of application, visit "Add PCA to Your Practice" under "For Professionals" tab.
  • Can I conduct an ECG on myself using PCA 500?
    PCA 500 is user-friendly and easy to apply. It can be used by patients themselves. For females, it is recommended to lie flat for the test. Therefore, for females and elderly patients, it is advised to have a trusted one to help.
  • How can my physician view my ECG recordings?
    Once an ECG is recorded, it is automatically uploaded to the cloud and the ECG is almost instantly available for your physician to access and view from anywhere.
  • Is the PCA 500 available for purchase?
    PCA 500 is currently a prescription-based device. Please consult your primary care physician or cardiologist to decide if PCA 500 can help you manage your disease or symptoms.
  • When should I clean my recorder?
    It should be gently cleaned before every use with a soft cloth dampened with lukewarm soapy water or natural cleanser.
  • How should I clean my recorder?

    To clean the recorder, dampen a soft cloth with lukewarm soapy water or natural cleanser and gently wipe down the recorder. The recorder should not be immersed in water under any circumstances.

  • Does PCA 500 continuously record my heart’s activity?

    PCA 500 is not a continuous heart monitor. It is an on-demand resting 12-lead ECG. When a patient wishes to record an ECG, the patient can apply the strip and recorder and use a compatible tablet or smartphone to record an ECG which is then uploaded to the cloud.

  • Is PCA 500 covered by my insurance?
    PCA 500 is currently not covered by medical insurance.
  • How long will it take to receive a diagnosis?

    Physician interpretation time will vary depending on your physician. If you would like your physician to review your results quickly, please contact your physician’s office.

  • I have a pacemaker. Can I still use PCA 500?

    Yes. PCA 500 is able to detect when there is a pacemaker present and it will not affect the quality of the ECG test.

  • I think I am having a medical emergency. Can PCA 500 be used in lieu of a trip to the Emergency
    If you think you are having a medical emergency, please dial 911 immediately. PCA 500 should not be used in place of emergency medical assistance.
  • What’s the difference between ECG and EKG?

    ECG and EKG are the same, both refer to electrocardiogram (or electrocardiograph), a medical test that is used for measuring the electrical activities of the heart, in order to detect heart diseases.

    EKG is from the spelling of of elektrokardiogramm or elektrokardiographie in German.

  • What are the major parts of an ECG Machine?

    A conventional 12-Lead ECG Machine contains 10 electrodes placed on chest and limbs for collecting signals, 10 lead wires, and a display for data analysis output.

    Now, PCA 500 has incorporated all the parts into a super compact kit : An ECG recorder weighs only 2 ounces, patented prepositioned electrode strips, QT ECG App for mobile devices, and a HIPAA-compliant cloud with powerful tools for data analysis and management. Being portable without complex wires, PCA500 simplifies the 12-Lead ECG tests process that most people can complete a test with no need for training.

  • What are the different types of ECG?

    There are 3 types of ECG in general use : Resting 12 Lead ECG, Exercise ECG and Holter Monitor. (Learn more)

  • How does an ECG Machine work?

    To measure the electrical activity signals of the heart, the ECG recorder is used for acquiring and recording the signal. Through the signals collected from the electrodes placed on the skin, the data will be shown as a graph with patterns to detect small electrical changes. Doctors can use it to diagnose cardiac abnormalities including rhythm and structural changes of the heart.

  • Which type of ECG/EKG test is best for me?

    It will depend on the professional advice by your physician, the doctors will suggest or request the patients to take a certain ECG according to their heart conditions and symptoms. (Learn more)

Xpress ECG

  • How do I know if my device is compatible with the QT ECG app?

    We are compatible with most iPhone, iPad, Android devices. For more information on compatibility, please visit:

  • How do I know if I am recording my ECG?

    • Click record and wait for 10 second count down, stay still with back relaxed until the recording is finished.
    • See ‘Completed” for a successful recording upload.
    • Click record and repeat the processes until 3 recordings are completed.

  • How do I return the kit when I am done with my ECG?

    When you have completed your ECG test, simply discard the electrode strip and place the compact ECG recorder into the prepaid USPS envelope for free return. You can place the envelope in your Outbox or drop it off at your local USPS store.

  • How can I get customer support?

    Our Customer Service team is available for calls and emails regarding Xpress ECG. We want to ensure anyone who orders an Xpress ECG at home or in a clinic will receive the assistance necessary to complete an ECG.

    Any patient can call QT Medical Customer Service anytime for help at +1 855 722 6006 or write to us at

  • Where do I find my login information?

    You should receive your username and password along with your kit. Simply login with the info, follow in-app instructions and record an ECG.

Customer Support

  • How do I get an account setup?

    You will receive an account activation guide with detailed instructions on how to set up an account after purchasing a device from QT Medical. You can go to and follow on screen instructions.

  • How do I log in to my account?

    You can log in with your username and password via the QT ECG app or via the web page at

Troubleshooting - Solutions to Common Problems

  • Why can’t I log in to my account?
    Ensure that you are typing in the correct username and password. If you forget your password, you can click on the “forgot password” button to reset your password.
  • Why is my ECG taking so long to upload?

    The processing time to complete an upload of ECG records depends on the speed of your internet connection. Make sure that you have a stable WiFi or Cellular connection to ensure that your ECG uploads.

  • Why does my App keep crashing?

    Make sure you have the most recent compatible version of the QT ECG App installed and that your device is supported. If the app is up-to-date and the device is supported but the app is still crashing, reboot your mobile device then restart the app may help. *Please be advised, we recommend that you turn off the automatic update functions for your phone’s OS and app. Before proceeding with updates, please check our compatibility list for the most updated OS/app combination that we currently support. If the problem persists, please contact customer support at or at 855 722 6006.

  • Why is my App not performing smoothly?
    Too many apps may be open and running at the same time. Please reboot the mobile device and try again.
  • Why isn’t the PWR LED indicator on my recorder lighting up during charging?
    The PWR LED indicator will automatically turn off after the battery is fully charged. If the PWR LED does not light up while charging, this may be an indication that the battery is fully charged.
  • What won’t my PCA 500 recorder turn on?

    Press and hold the power button for 30 seconds. If PWR LED indicator still does not light up, try again after charging the device for 1 hour. If above solution does not work, please contact QT Medical customer support at or call 855 722 6006.

  • Why won’t be PCA 500 recorder turn off?

    Please make sure the Micro-USB cable is not connected. Press and hold power button for 30 seconds. If still unable to turn off the PCA 500 recorder, please contact QT Medical customer support at or call 855 722 6006.

  • Why can’t the recorder record ECG signals?

    Please review the User’s Manual to ensure all steps and instructions are followed. If the problem persists, try recording ECG signals again after closing the QT ECG app, and rebooting the mobile device and the recorder.

  • Why did all my ECG tracings disappear on the display?

    The problem may be caused by system overload. In the case of system overload, the tracings can be normal then disappear, or the tracings doesn't even appear in the first place. Disconnect the PCA 500 recorder from the Electrode Strip then carefully remove the Strip from the patient’s chest. Restart the entire process by re-attaching the Electrode Strip (or use a new Strip) on the patient. If the problem persists, please contact QT Medical customer support at or call 855 722 6006.

  • What should I do when a lead-off warning is shown?
    Tap on the yellow question mark icon in the top right corner. Check the corresponding chest electrode(s). Make sure each electrode is attached properly to the skin and making a good physical contact. Ensure there is no hair or oil interfering with skin contact. If needed, shave the chest hair under the electrode strip or wipe off excess oil with a moist cloth. Firmly press on the area of the strip indicated in yellow to ensure good electrode contact with the skin. In a low humidity environment, electrodes may dry up, preventing adhesion to the skin. If the electrodes have been stored in a dry environment, and a "lead-off" alert is shown in the app during use, please use a moist cloth to dampen the patient's chest and reattach the electrode.

Technical Details

  • Where is my data stored?
    On your mobile device (internet connection unavailable): Your data is automatically stored on your mobile device during situations where internet connection is not available, up to 100 recordings. In HIPAA compliant cloud (internet connection available): Once your mobile device is connected to the internet, your ECG recordings are uploaded and synchronized on a secure, HIPAA-compliant cloud.

Legal and Privacy

  • Are my data secure?

    Yes. All data are transferred through an encrypted connection to the cloud compliant with the Health Insurance Portability and Accountability Act (HIPAA) & European General Data Protection Regulation (GDPR). Please refer to our terms of use and privacy policy for more detailed information.

  • What do you do with my information?

    We take your privacy and health information seriously. QT Medical complies with applicable privacy and health information laws in the U.S. Furthermore, QT Medical complies with European General Data Protection Regulation (GDPR). Please refer to our terms of use here and privacy policy here for more detailed information.


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