Got other questions on PAC or SVT? See the Qaly guides on PAC and SVT:
- What PAC Looks Like on Your ECG
- What Heart Palpitations and Irregular Heartbeats Look 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
Our heart rhythm is the cornerstone of heart health, and deciphering our heart's electrical activity is crucial in understanding various heart conditions. In this article, we delve into the realms of premature atrial contraction (PAC) and supraventricular tachycardia (SVT) on your watch ECG. By understanding the rhythms of "PAC vs SVT", you can gain deeper insights into your heart's function and potential anomalies that may need attention. Let’s dive in.
What’s a PAC Couplet?
Premature atrial contractions are early beats that originate from the atria — the upper chambers of the heart. When they occur in pairs, they are referred to as a couplet. While occasional PACs are usually benign, frequent PACs can sometimes indicate underlying heart disease or trigger other arrhythmias.
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.
“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.
What’s the Difference Between a PAC Couplet and SVT?
When comparing "PAC vs SVT," several differences emerge. Primarily, the origin and frequency of these rhythms differentiate them. PACs originate from the atria and may occur sporadically, whereas SVT is a condition characterized by rapid heartbeats, often over 100 beats per minute and runs for 3 or more consecutive beats.
However, both PACs and non-sustained SVT may cause similar sensations, such as palpitations or the feeling of a fluttering heart. Both rhythms may also be triggered by stress, excessive caffeine or alcohol intake, and certain medications.
It's important to remember that while your watch ECG can assist you in identifying and monitoring these rhythms, any persistent or symptomatic arrhythmias should warrant a consultation with a healthcare provider. Understanding and recognizing these rhythms is a significant step in proactive heart health management. Stay informed, stay proactive, and stay heart healthy!
Still Not Sure if It’s Premature Atrial Contraction (Couplet) or Supraventricular Tachycardia (Non-Sustained) on Your ECG?
Differentiating between PAC Couplet vs SVT 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 for free today!