First Degree AV Block Vs. Wenckebach on Your Watch ECG

Got other questions on First Degree AV Block or Wenckebach? See the Qaly guides on First Degree AV Block and Wenckebach:

• What First Degree AV Block Looks Like on Your ECG
• What Wenckebach 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

In heart health, ECGs or electrocardiograms play a vital role in diagnosing various heart conditions. The advent of ECG-equipped smartwatches has made it even easier to monitor our heart health regularly. This article will delve into two distinct heart rhythms: first degree AV block and Wenckebach (Mobitz type I), and how they may appear on your watch ECG. Let’s dive in!

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What’s First Degree AV Block?

First Degree AV Block is an abnormal heart condition where there is a delay (but no blockage) in the conduction pathway between the atria and ventricles. On an ECG, this block is characterized by a prolonged PR interval (>200 milliseconds). Here’s more on what first degree AV block looks like on your watch ECG.

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For further understanding of First Degree AV Block, including its potential causes and treatment, please visit our detailed blog post.

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What’s Wenckebach?

Wenckebach, or Mobitz type I, is a type of second-degree heart block. It is characterized by progressive prolongation of the PR interval until a beat is dropped (a P wave is not followed by a QRS complex). On an ECG, you will observe a repetitive pattern: each PR interval is longer than the one before until a QRS complex is missed, at which point the cycle starts anew. Here’s more on what Wenckebach looks like on your watch ECG.

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What’s the Difference Between First Degree AV Block and Wenckebach?

The comparison of first degree AV block and Wenckebach brings out some distinct differences, primarily in the ECG presentation and clinical implications. While both are types of AV blocks indicating a delay in the electrical conduction system, first degree AV block has a consistently prolonged PR interval with no dropped beats, whereas Wenckebach features a progressively lengthening PR interval followed by a dropped beat.

Symptoms, if present, will vary based on the individual and the severity of the block. While first degree AV block is often asymptomatic, Wenckebach may present with light-headedness, fatigue, or at times, no symptoms at all. Treatment also varies, with first degree AV block often requiring no treatment, while Wenckebach may need closer monitoring, and occasionally pacemaker insertion if symptomatic or persistent.

Remember, your watch ECG is a powerful tool in detecting heart rhythm irregularities, but it is not a replacement for a comprehensive medical examination. If you notice any irregularities on your ECG, promptly consult with a healthcare provider for a thorough assessment. Stay informed, stay proactive, and stay heart healthy!

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Still Not Sure if It’s First Degree AV Block or Wenckebach on Your ECG?

Differentiating between first-degree AV block vs Wenckebach 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!

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