HR
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ONE STRIP. THREE CALLS.
Read the rhythm.
Build recognition, one tracing at a time.
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ACCURACY
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CASE STREAK
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OVERALL MASTERY
0 / 32 CLEARED · ACCURACY —
A rhythm counts as cleared once you call it correctly twice in a row. Progress saves on this device and syncs to your account when you're signed in.
SYNTHETIC LEAD II CASE 001
✓ Checked | 10 s strip
25 mm/s · 10 mm/mV Small box = 40 ms
↔ Scroll the strip to inspect every beat
CALIPER MEASUREMENT — DRAG THE RED LEGS
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INTERVAL
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SECONDS
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SMALL BOXES (1 mm)
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LARGE BOXES (5 mm)
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HEART RATE IF THIS IS R–R
MEASUREMENT — CALIPERSSelect a row, stage the legs on the strip, then Apply. Nothing is auto-measured — the values are yours.
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STAGED INTERVAL
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SECONDS
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SMALL BOXES (1 MM)
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RATE IF THIS IS R–R
| Measurement | Value | Unit |
|---|---|---|
| PR | — | sec |
| QRS | — | sec |
| QT | — | sec |
| R-R | — | sec |
| Rate | — | /min |
Applied values are kept only while you analyse this strip — loading a new strip clears the table.
STRIP MEASUREMENTS
PR
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QRS
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QT ··
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Your interpretation
0 of 3 selected01Underlying rhythm or conduction pattern
02Isolated PVCs?
03AV block?
Choose one answer in each section.
Interpret this strip
Not submittedRead it the way you would on the monitor. Turn on Calipers, stage each interval in the measurement panel and press Apply \u2014 PR, QRS, QT and R\u2013R (Rate follows from R\u2013R). Then pick the rhythm and submit. Intervals are graded with a little leeway: \u00b140 ms (one small box) or \u00b110% of the true value, whichever is larger; Rate gets \u00b15 bpm. Anything you don't Apply is marked \u201cNot measured\u201d \u2014 it doesn't count against you.
01Rhythm interpretation
Measure what you can, then commit to a reading.
Practice questions
These open the actual NCLEX bank questions — the answers, gold-standard rationales and open-textbook sources live in the NCLEX Trainer, so what you practise here is the real bank, not a copy.
THIS SESSION
Progress
Saved on this device and, when you're signed in, synced to your account — pick up where you left off on any device.
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ACCURACY
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BEST STREAK
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CASES COMPLETED
Rhythms to revisit
Nothing missed yet — your misses will collect here.
Account settings
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RECOGNITION ONLY
Field guide
The recognition clues for every rhythm in the library. Rate, regularity, P waves, intervals, relationship.
START HERE
Normal sinus rhythm \u2014 the regular rhythm
Every rhythm in the table below is a variation on this one, so it comes first. This is the strip all the others are compared against: the sinus node fires, the impulse spreads across the atria (the P wave), crosses the AV node on schedule (the PR interval), and races through the ventricles (a narrow QRS) \u2014 beat after identical beat.
SYNTHETIC LEAD II TEACHING STRIPNOT A QUIZ \u2014 JUST LOOK
25 mm/s \u00b7 10 mm/mV Small box = 40 msRate 75 \u00b7 PR 160 ms \u00b7 QRS 90 ms \u00b7 QT 400 ms
- Rate 60\u2013100/min \u2014 and regular: every R\u2013R interval the same.
- One upright P wave before every QRS \u2014 one P : one QRS, every time.
- PR interval 120\u2013200 ms (3\u20135 small boxes), constant on every beat.
- QRS narrow \u2014 under 120 ms (under 3 small boxes).
The strip above is drawn to sit inside every one of those limits. When a practice strip breaks one of them, the broken rule is usually the diagnosis.
DIAGRAM ZOOM
Drawn at the standard settings used across this app: paper speed 25 mm/s, calibration 10 mm/mV. Time runs left to right \u2014 count boxes horizontally for intervals (PR, QRS, QT) and vertically for voltage. The PR interval is measured from the start of the P wave to the start of the QRS; the QT interval from the start of the QRS to the end of the T wave.
| Rhythm | Rate | Clues |
|---|
YOUR DECK
Flashcards
Strips you saved from answered cases. Each card re-draws its strip live from the saved case data — flip it to check the call.
Your deck: 0 cards
No flashcards yet — answer a case, then tap + Save to Flashcards under the feedback and the strip will be waiting for you here.