75% - 85%

Cases of sudden cardiac death caused by ventricular arrhythmias


Estimated number of Americans with Atrial Fibrillation (Afib)


Of people over the age of 65 in the U.S. have AFib.

Risk of Untreated Arrhythmia

Many heart arrhythmias are harmless; however, if they are particularly abnormal, or result from a weak or damaged heart, arrhythmias can cause serious and even potentially fatal harm.

Untreated arrhythmias such as tachycardia or atrial fibrillation (AFib or AF) can have serious consequences, including cardiac arrest and stroke.

Detecting an Arrhythmia

Because abnormal heart rhythms and cardiac symptoms can come and go, they can be difficult to detect. Your doctor may want to evaluate your heartbeat over time with a portable cardiac monitor from VirtuOx.

Discreet Cardiac Monitoring

VirtuOx uses RhythmStar®, a revolutionary 1-piece heart monitor that is discreet and comfortable to wear.

With built-in 4G cellular connectivity, RhythmStar records and transmits your heartbeat to our monitoring center, where certified cardiac technicians review your heart rhythm and notify your doctor of any unusual activity.

Why choose VirtuOx?

  • Comfort

    1-piece wearable and water-resistant design that’s discreet, easy to wear, and operate.

  • Convenience

    The only wearable heart monitor with built-in cellular technology. Other monitors require connection to a cell phone or gateway device.

  • Care

    Our friendly Care Coordinators are available to assist you 24 hours per day, 7 days per week.

Who is VirtuOx?

VirtuOx is a Joint Commission approved, Medicare certified, Independent Diagnostic Testing Facility (IDTF) that performs over 40,000+ new diagnostic tests each month in the patient’s home that consists of:

  • Overnight Pulse Oximetry (POX)
  • Home Sleep Testing (HST)
  • Insomnia Testing (EEG)
  • Mobile Cardiac Telemetry (MCT)

24/7 Patient Support: 1-877-897-0063

VirtuOx does not deliver therapy or provide life support. If you are having a medical emergency, dial 9-1-1.

Click here for the RhythmStar® Quick Start Guide


When you receive your system from your physician or VirtuOx, the kit will include the RhythmStar Wearable Quick Start Guide as well as the monitor, adhesive electrodes, a USB adapter, and a USB power adapter. If you have been instructed to mail the kit back to VirtuOx at the conclusion of your monitoring service, a pre-paid return envelope will also be provided.
Yes, always wear your RhythmStar Wearable device to help ensure the Monitoring Center and your physician can access important heart information as promptly as possible. RhythmStar Wearable is water resistant, allowing you the freedom to go about your daily activities while wearing the monitor. However, it is recommended to remove and charge the RhythmStar Wearable device for 30 minutes each day.
If you plan on being away for several days, take the charging base and USB power supply with you so you can recharge the device. Do not forget to bring some extra adhesive electrodes. If you are traveling by air, the monitor may trigger airport detectors, but it will not be damaged. You may leave the device on and monitoring during air travel.
For men, start by trimming the hair on your chest as needed. Clean the skin with warm water or rubbing alcohol and allow the skin to dry. Do not use lotions or creams before application.

Connect one adhesive electrode to the back of the RhythmStar Wearable monitor and one adhesive electrode to the red ECG cable snap. Then remove the protective backing from the adhesive electrodes and apply the monitor following the color-coded picture below.
It is recommended that electrodes typically be changed every other day. If your electrodes remain in place without showing signs of detaching, you may wear your electrodes for longer than several days. Changing the electrodes too often may irritate the skin, while not changing the electrodes enough may provide poor quality ECG data.
No, RhythmStar Wearable has built in 4G cellular technology and sends your heart information to the Monitoring Center via cellular network. There is no cost to you for data transmission and you do not need to use/pair your phone to the device as data is sent directly without the need for an external communication device.
RhythmStar Wearable has a built-in rechargeable battery. It is recommended to charge the device for 30 minutes each day using the RhythmStar Charging Base and USB power supply. The battery indicator will be a steady red color while charging and then turn to green when the device is fully charged.
If you do not charge your RhythmStar Wearable device for 30 minutes each day, it may take up to 3 hours to completely recharge the monitor.
RhythmStar Wearable operates on extremely low power. The device should not increase in temperature. However, if the unit does feel warm, please remove and contact a VirtuOx Care Coordinator.
Unless your physician instructs you to return the monitor to their office, the monitor and related accessories (the USB adapter, the USB power adapter and any unopened packages of adhesive electrodes) must be promptly returned to VirtuOx to avoid any unnecessary charges. Place the monitor and accessories into the packaging box and place the box into the provided prepaid mailing bag for return.
Please contact your ordering prescriber for your results approximately 7 days following your test.