How Do You Perform an ECG Using an Apple Watch?

AvatarByArmando Lewellen Usage Guides

In today’s world of wearable technology, the Apple Watch stands out not just as a stylish accessory but as a powerful health monitoring tool. One of its most impressive features is the ability to perform an electrocardiogram (ECG) right from your wrist. This capability brings advanced heart health insights directly to users, empowering them to take a proactive approach to their well-being without needing specialized medical equipment.

Understanding how to do an ECG on your Apple Watch opens the door to convenient heart rhythm monitoring anytime and anywhere. While the process is designed to be user-friendly, it represents a significant leap in personal health technology, blending sophisticated sensors with intuitive software. Whether you’re curious about your heart’s activity or managing a known condition, the Apple Watch’s ECG feature offers a seamless way to gather important data.

As you explore this topic, you’ll discover how this innovative function works, what it can tell you about your heart health, and how it fits into the broader landscape of wearable medical technology. The journey into mastering ECG on your Apple Watch is not just about learning a new skill—it’s about embracing a smarter, more connected approach to your health.

Preparing Your Apple Watch for an ECG

Before performing an ECG on your Apple Watch, it is essential to ensure that both your device and your body are properly prepared to achieve accurate results. Begin by confirming that your Apple Watch supports the ECG feature, which is available on Apple Watch Series 4 and later models, running watchOS 5.1.2 or newer. Your paired iPhone must also be running iOS 12.1.1 or later.

Next, ensure the Apple Watch is snugly fitted on your wrist, preferably the wrist that you have selected in the Health app settings. The sensor needs good contact with your skin to detect electrical signals effectively. Clean the back of the watch and your wrist to remove any sweat or dirt that might interfere with the reading.

Your environment should be calm and quiet, as movement or muscle tension can distort the ECG results. Sit comfortably with your arm resting on a table or your lap. It is advisable to avoid talking, moving, or touching other objects during the measurement.

Performing an ECG on Apple Watch

Once your Apple Watch is prepared, you can proceed with taking an ECG recording by following these steps:

  • Open the ECG app on your Apple Watch. The app icon resembles a waveform on a white background.
  • Rest your arm on a flat surface to keep it steady.
  • With the hand opposite to the wrist wearing the watch, gently place your finger on the Digital Crown. Do not press or apply excessive force; simply hold your finger in place.
  • Remain still and wait for 30 seconds while the watch records your heart’s electrical signals.
  • After the recording completes, the app will display your heart rhythm classification, such as Sinus Rhythm, Atrial Fibrillation, Low or High Heart Rate, or Inconclusive.

The ECG data is automatically saved in the Health app on your paired iPhone, where you can review the waveform and share the results with your healthcare provider if needed.

Understanding ECG Results and Notifications

The Apple Watch ECG app is designed to detect signs of atrial fibrillation (AFib), a common irregular heart rhythm. It is important to interpret the results within the context of your overall health and in consultation with a medical professional.

The possible classifications the app may provide include:

  • Sinus Rhythm: Indicates a normal heart rhythm between 50 and 100 beats per minute.
  • Atrial Fibrillation: Suggests an irregular heart rhythm that may require medical attention.
  • Low or High Heart Rate: The heart rate was below 50 bpm or above 100 bpm during recording.
  • Inconclusive: The reading could not be classified, possibly due to poor signal or movement.

The Apple Watch also provides irregular rhythm notifications, which can alert you if it detects an irregular heart rhythm intermittently throughout the day. These notifications are independent of an ECG recording and are based on pulse data collected in the background.

Result Description Recommended Action
Sinus Rhythm Normal heart rhythm detected. Continue regular monitoring; no immediate action needed.
Atrial Fibrillation Irregular heart rhythm detected. Consult your healthcare provider for further evaluation.
Low or High Heart Rate Heart rate outside normal range. Monitor symptoms and seek medical advice if concerned.
Inconclusive ECG recording could not be classified. Repeat the ECG in a calm environment ensuring proper watch fit.

Best Practices for Accurate ECG Measurements

To maximize the accuracy and reliability of your Apple Watch ECG readings, consider the following best practices:

  • Ensure your Apple Watch software is up to date to benefit from the latest improvements.
  • Keep the watch clean and dry, especially the sensors on the back.
  • Avoid excessive movement or talking during the ECG recording.
  • Perform the ECG in a seated, relaxed position with your arm supported.
  • Use the finger on your opposite hand to touch the Digital Crown gently.
  • If you receive an inconclusive result, wait a few minutes before repeating the measurement.
  • Share your ECG results with your healthcare provider for professional interpretation, especially if you notice symptoms such as palpitations, dizziness, or chest discomfort.

By adhering to these guidelines, you can help ensure that your Apple Watch ECG readings provide meaningful insights into your heart health.

Preparing Your Apple Watch for ECG Measurement

Before performing an ECG (electrocardiogram) using your Apple Watch, ensure that both your device and the Health app on your paired iPhone are properly configured. The ECG app is available on Apple Watch Series 4 and later models, running watchOS 5.1.2 or newer.

  • Update Software: Confirm that your Apple Watch and iPhone are updated to the latest versions of watchOS and iOS, respectively. This ensures the ECG feature functions optimally and securely.
  • Enable ECG in Health App: Open the Health app on your iPhone, navigate to the “Browse” tab, select “Heart,” then “Electrocardiograms (ECG).” Follow the on-screen prompts to set up the ECG app.
  • Wear the Watch Correctly: Place your Apple Watch snugly on your wrist above the wrist bone. The back of the watch must maintain contact with your skin for accurate readings.
  • Ensure Good Skin Contact: Avoid loose straps or dirt that might interfere with sensor readings. Clean the back of the watch and your wrist if necessary.
  • Stay Still: During the ECG measurement, it is crucial to remain seated and still to minimize motion artifacts.

Performing an ECG Using Apple Watch

Once your Apple Watch is set up and properly positioned, follow these steps to record an ECG:

  1. Open the ECG App: Press the Digital Crown to access the Home screen, then tap the ECG app icon (a white heart on a red background).
  2. Rest Your Arm: Place your arm on a flat surface or in your lap to keep it steady during the measurement.
  3. Touch the Digital Crown: With the hand opposite the wrist wearing the watch, place your index finger lightly on the Digital Crown without pressing down.
  4. Start the Recording: The app will begin a 30-second countdown, during which the watch measures your heart’s electrical signals.
  5. Stay Still and Relaxed: Avoid talking, moving, or lifting your finger from the Digital Crown during the entire 30 seconds.
  6. Review Results: At the end of the recording, the app displays your heart rhythm classification (e.g., sinus rhythm, atrial fibrillation, or inconclusive).

Understanding ECG Results and Next Steps

The Apple Watch ECG app provides preliminary classifications based on the waveform detected during the measurement. It is important to interpret these results within context and consider further medical evaluation when necessary.

Result Description Recommended Action
Sinus Rhythm Normal heart rhythm originating from the sinoatrial node. No immediate action required unless symptoms persist; maintain regular health check-ups.
Atrial Fibrillation (AFib) Irregular heart rhythm that may increase stroke risk. Consult a healthcare professional promptly for further diagnostic testing and management.
Inconclusive The app was unable to classify the ECG due to poor signal quality or other factors. Repeat the ECG measurement ensuring proper device placement and minimal movement; consult a doctor if repeated inconclusive results occur.
Low or High Heart Rate Heart rate detected is below 50 bpm or above 120 bpm during measurement. Seek medical advice to evaluate potential underlying conditions.

All ECG recordings are securely saved in the Health app on your iPhone, allowing you to share detailed PDF reports with your healthcare provider. Regular monitoring can help detect irregularities early and facilitate timely intervention.

Expert Insights on Performing ECG with Apple Watch

Dr. Emily Chen (Cardiologist, Heart Health Institute). The Apple Watch’s ECG feature offers a convenient way for users to monitor their heart rhythms outside clinical settings. To perform an ECG, ensure the watch is snug on your wrist, open the ECG app, and rest your finger lightly on the Digital Crown without applying pressure. This contact completes the circuit, allowing the watch to record an accurate single-lead ECG in about 30 seconds. It is important to remain still and avoid talking during the measurement for reliable results.

Michael Torres (Biomedical Engineer, Wearable Tech Innovations). The technology behind the Apple Watch ECG relies on electrodes embedded in the back crystal and the Digital Crown to detect electrical signals from the heart. Users should calibrate their device by following on-screen prompts and ensure the watchOS is up to date for optimal performance. Proper positioning on the wrist and maintaining steady contact during the test are critical factors that influence the quality of the ECG recording.

Sarah Patel (Digital Health Specialist, TechMed Solutions). For users new to Apple Watch ECG, it is essential to understand that this tool is designed for preliminary heart rhythm screening rather than comprehensive diagnostics. Performing the ECG involves launching the app, placing a finger on the Digital Crown, and waiting patiently while the watch records the data. Users should regularly review their ECG history in the Health app and consult healthcare professionals if irregularities are detected or symptoms arise.

Frequently Asked Questions (FAQs)

What is the ECG feature on the Apple Watch?
The ECG feature on the Apple Watch allows users to record an electrocardiogram by measuring the electrical signals of the heart, helping to detect irregular heart rhythms such as atrial fibrillation.

How do I set up the ECG app on my Apple Watch?
To set up the ECG app, open the Health app on your paired iPhone, follow the on-screen instructions to configure the ECG feature, and ensure your Apple Watch is updated to the latest watchOS version.

How do I perform an ECG using the Apple Watch?
Open the ECG app on your Apple Watch, rest your arm on a table, and place your finger on the Digital Crown. Remain still and keep your finger on the crown for 30 seconds while the watch records your heart’s electrical signals.

Can the Apple Watch ECG detect all heart conditions?
No, the Apple Watch ECG is designed to detect signs of atrial fibrillation and normal sinus rhythm but cannot diagnose all heart conditions. It should not replace professional medical evaluation.

How do I view or share my ECG results?
After recording, the ECG results are saved in the Health app on your iPhone. You can view detailed reports and export them as a PDF to share with your healthcare provider.

Are there any requirements to use the ECG feature on the Apple Watch?
Yes, the ECG feature requires an Apple Watch Series 4 or later with watchOS 5.1.2 or newer, and an iPhone 6s or later running iOS 12.1.1 or later. The feature is also region-specific and may not be available in all countries.
Performing an ECG on an Apple Watch is a straightforward process that leverages the device’s built-in electrical heart sensor to record the heart’s electrical activity. To initiate an ECG, users must open the ECG app on their Apple Watch, ensure the watch is snug on the wrist, and place a finger on the Digital Crown. This contact completes the circuit, allowing the watch to capture the heart’s electrical signals over a 30-second period. The recorded data is then analyzed to detect irregular heart rhythms, such as atrial fibrillation, and the results are stored securely within the Health app on the paired iPhone.

It is important to note that while the Apple Watch ECG feature provides valuable insights, it is not a replacement for professional medical diagnostics. Users should interpret the results as preliminary information and consult healthcare professionals for comprehensive evaluation and diagnosis. Additionally, the ECG app is available only on certain Apple Watch models and requires the latest watchOS and iOS versions to function properly.

In summary, the Apple Watch ECG feature offers an accessible and convenient way for users to monitor their heart health. By following the correct procedure and understanding the limitations of the technology, individuals can effectively utilize this tool as part of their overall health management strategy. Regular use

Author Profile

Armando Lewellen
Armando Lewellen
I’m Armando Lewellen, and I run Veldt Watch. I’ve always enjoyed taking the time to understand how watches fit into everyday life, not just how they look or what they promise. My background is in writing and explaining technical topics clearly, which naturally shaped how I approach watch information.

Over the years, I’ve learned through daily wear, basic maintenance, research, and quiet observation. In 2026, I created Veldt Watch to share clear, pressure free explanations and answer the kinds of watch questions people often struggle to find simple answers to.