Ectopic Atrial Rhythm Vs. Supraventricular Tachycardia (Non-Sustained) on Your Watch ECG

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

• What Ectopic Atrial Rhythm Looks Like on Your ECG
• What SVT Looks Like on Your ECG
• ‍How to Read an ECG: Stanford Cardiologist Explains
• ‍The Ultimate Cardiologist's Guide to the Smartwatch ECG

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Introduction

With advancements in wearable technology, it's now possible to keep tabs on our heart health more conveniently than ever before. Your smartwatch ECG is a prime example of this, with the ability to monitor and distinguish between different heart rhythms like an ectopic atrial rhythm (EAR) and supraventricular tachycardia (SVT). In this article, we will discuss these two rhythms, EAR vs SVT, looking at their definitions, ECG manifestations, and the implications they may have for our health. Let’s dive in!

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What’s Ectopic Atrial Rhythm?

Ectopic Atrial Rhythm (EAR) is an abnormal heart rhythm where the electrical impulse begins from a site other than the sinus node within the atria. 

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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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What’s SVT?

SVT is an abnormal fast heart rhythm starting in the upper chambers (atria) of the heart, leading to a heart rate often between 150 to 250 beats per minute.

On an ECG, SVT is identified by a rapid, regular rhythm with typically narrow QRS complexes. Often, P waves are difficult to see. 

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“Non-sustained” SVT lasts less than 30 seconds, whereas “sustained” SVT lasts longer, sometimes even up to several hours. Here’s more on what SVT looks like on your watch ECG.

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What’s the Difference Between EAR and SVT?

When comparing EAR vs SVT, the fundamental difference lies in the origin of the abnormal rhythm and the heart rate. EAR originates from different parts of the atria and typically does not result in a fast heart rate. In contrast, SVT, specifically non-sustained SVT, is characterized by bursts of rapid heartbeats originating above the ventricles. Furthermore, both EAR and non-sustained SVT run for 3 or more consecutive beats.

In terms of health impacts, both EAR and non-sustained SVT can be indicative of underlying heart conditions, or they might be triggered by factors like stress, caffeine, or alcohol. While these rhythms can occur in healthy individuals, repeated episodes or accompanying symptoms such as chest pain, shortness of breath, or dizziness warrant a consultation with a healthcare provider.

While your watch ECG provides valuable insights into these rhythms, it's important to note that it doesn't replace a thorough evaluation by a medical professional. If you notice persistent abnormal rhythms on your ECG, seeking medical advice is paramount. With the understanding of EAR vs SVT, you are better equipped to monitor your heart health and seek timely medical attention when necessary. Stay informed, stay proactive, and stay heart healthy!

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Still Not Sure if It’s Ectopic Atrial Rhythm or Supraventricular Tachycardia (Non-Sustained) on Your ECG?

Differentiating between SVT vs EAR 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!