Sinus Rhythm Vs. Ectopic Atrial Rhythm on Your Watch ECG

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Got other questions on Sinus Rhythm or Ectopic Atrial Rhythm? See the Qaly guides on Sinus Rhythm and Ectopic Atrial Rhythm:

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Introduction

Health technology is transforming the way we monitor and understand our wellbeing, particularly in relation to heart health. The electrocardiogram, or ECG, is one of these advanced tools, now accessible on many smartwatches. Today, we'll dissect the nuances between sinus rhythm vs EAR, otherwise known as ectopic atrial rhythm, and how they appear on your watch ECG. Let’s dive in.

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What’s Sinus Rhythm?

Sinus rhythm, or normal sinus rhythm, is considered the standard rhythm of a healthy heart. In this pattern, electrical signals originate from the sinoatrial (SA) node located in the right atrium, initiating each heartbeat and ensuring they occur at a steady, regular rate.

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Sinus Rhythm read on an Apple Watch ECG through the Qaly app.

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On an ECG, sinus rhythm is characterized by a distinct P wave (indicating atrial contraction) followed by the QRS complex (signifying ventricular contraction), then the T wave (representing ventricular relaxation). This cycle repeats at a rate of 60-100 times per minute in adults at rest. Here’s more on what sinus rhythm looks like on your watch ECG.

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Sinus Rhythm read on a Fitbit ECG through the Qaly app.

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‍What’s Ectopic Atrial Rhythm?

An ectopic atrial rhythm (EAR), on the other hand, is a heart rhythm where the electrical impulse begins from a site other than the sinus node within the atria.

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Ectopic Atrial Rhythm read on an Apple Watch ECG through the Qaly app.

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On an ECG, EAR may appear similar to a sinus rhythm, but the key difference lies in the P wave, which may be shaped differently, occur at an abnormal rate, or be positioned unusually compared to the QRS complex. Here’s more on what ectopic atrial rhythm looks like on your watch ECG.

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EAR read on a Kardia ECG through the Qaly app.

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What’s the Difference Between Sinus Rhythm and Ectopic Atrial Rhythm?

When comparing sinus rhythm vs EAR, the heart rate, origin of the electrical impulse, and the shape and position of the P wave on the ECG are key differentiating factors. While a sinus rhythm indicates a healthy, normal heart rhythm, an EAR arises from a different site within the atria and may be associated with an altered P wave on the ECG.

Healthwise, sinus rhythm is generally a sign of a healthy heart. EAR, although not typically life-threatening, may cause palpitations or a sensation of an irregular heartbeat. It could also suggest an underlying heart disease or be a response to external factors like stress, caffeine, or certain medications.

In essence, understanding your heart rhythms, whether it's sinus rhythm or EAR, plays a critical role in managing your overall heart health. Your watch ECG can provide valuable insights into your heart's activity, but it's crucial to seek professional medical advice if you notice consistent irregularities or experience symptoms. Stay informed, stay proactive, and stay heart healthy!

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Still Not Sure if It’s Sinus Rhythm or Ectopic Atrial Rhythm?

Differentiating between sinus rhythm vs ectopic atrial rhythm on your ECG can be tricky. If you’re still looking for help interpreting your ECG further, check out the Qaly app on App Store or Play Store. On Qaly, human experts will interpret your ECGs within minutes, day or night. Try out the Qaly app today!