Delta Tutor · Free fundamentals, Pro for the complete monitor
ECG Rhythm Lab
Start with three-lead ECG fundamentals, core rhythms and the New to ECGs assessment. Pro will add the complete rhythm library, advanced monitoring lessons and higher-level assessments. Instructor controls are planned for SimLab.
Delta ECG Rhythm Lab
Pick a view
Call it with confidence on a 3-lead monitor: this is a rate, regularity, and conduction question.
Locked rhythms are in Pro. Unlock Pro
How to read it
- Rate: count the R waves. 60 to 100 is normal.
- Rhythm: R to R spacing is even and regular.
- P waves: one upright P before every QRS in lead II.
- Intervals: PR 120 to 200 ms, QRS under 120 ms.
Select a factor
The first R wave is sitting on a heavy line for you. Name the next heavy lines 300, 150, 100, 75, 60, 50, and wherever the following R wave lands is the rate. This one runs 66 bpm, a normal rate. Normal is 60 to 100.
Regular rate and rhythm at 60 to 100 bpm. Upright P wave in lead II. PR interval 120 to 200 ms. QRS under 120 ms. Normal axis.
How it is managed
Read the patient: Normal sinus is the baseline, so the question is whether the patient's symptoms fit the rhythm or point somewhere else.
Stable / not sick
No rhythm treatment is needed. Confirm perfusion, treat what the patient actually complains of, and keep monitoring.
Unstable / sick
A sick patient with a normal rhythm is not sick from the electrical activity, so look off the monitor for shock, sepsis, or another driver.
Educational only. Follow your current protocols and medical direction.
Simulated waveforms for training only. Not a medical device and not for clinical use.
Switch mode above or below · deltaemergency.com
Simulated waveforms for education and training only. Not a medical device, diagnostic tool or substitute for clinical protocols and medical direction.
Pro
The complete patient monitor is in Pro.
Every other rhythm, every other twelve and fifteen lead, SpO₂ and end-tidal CO₂ interpretation, and the vitals you can drive unlock with Pro.
Three-lead fundamentals stay free: normal sinus, sinus brady and tachy, VT, VF, asystole and the inferior STEMI, with the reading guides.
Not on sale yet
Pro is being finished. This tool opens with it. Nothing here asks for a card today.
Already have Pro on your account? Sign in.
Vendor neutral on purpose: we teach ECGs and patient assessment, not devices. What you learn here reads the same on whatever monitor or AED your service runs.
A free study aid from Delta Emergency Support Training. This is a simulator, not a diagnostic tool, and not medical direction. Simulated tracings are idealised; real patients are noisier. Always follow your own protocols and medical oversight.
Rhythms come up in EMR training. See the course.Emergency Medical Responder