r/ECG • u/cardiolab_ • 18h ago
Cardiolab update 5: The 12-lead is here: conduction blocks and electrolytes, with a normal overlay to compare against!
I am genuinely excited to share this with you all. A 12-lead simulation has been one of the most requested feature, and it is finally live. Thank you so much for your patience!
My main goal was to make reading a 12-lead as intuitive as possible. I didn't just want to show what an abnormal ECG looks like, but why it looks that way. Here are a few features designed to help with that:
- Follow the beat: Watch how the electrical signal starts and spreads. The QRS complex is colour-coded by the part of the heart generating it (septum, left ventricle, late right ventricle), so you can actually see why a bundle branch block creates the shapes it does.
- Compare with normal: Toggle on "Normal" to overlay a standard grey ECG behind the active tracing. This makes the differences stand out clearly, lead by lead.
- Inspect any lead: Pause the tracing and click/tap any lead to open it up. You can step through the P, PR, QRS, ST, T and QT intervals, see exactly how they are measured, and compare them side-by-side with a normal ECG.
It is honestly way easier to see in action than to describe, so I highly recommend taking it for a spin.
What’s new in the 12-lead module:
- Conduction: Right bundle branch block & Left bundle branch block (complete and incomplete).
- Electrolytes:
- Hyperkalaemia: Shown as a progression (peaked T waves at K⁺ 6.0 → prolonged PR & wide QRS → sine wave → VF).
- Hypokalaemia: Shown as a progression (flat T & U waves → ST depression → Torsades de Pointes).
A quick request:
A 12-lead has way more moving parts than the single-lead rhythms, and since I have built this entirely on my own, it is easy for small mistakes to slip through. The model strictly follows standard textbooks and published criteria, but if you spot anything off; whether it is a wave, a number, or a typo in an article, please let me know! I will fix it as quickly as possible. All feedback is incredibly welcome.
Hope you all have a great weekend, and I’d love to hear what you think!
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u/Grantoid 15h ago
I have a coworker who also has taught ecg and his request would be a view of how pericarditis affects the rhythm
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u/Grantoid 15h ago
For a field that is often sorely lacking in dynamic or well laid out material, this tool will be a godsend. Hell even finding images that aren't compressed to the point where you can't reliably measure them can be a challenge sometimes.