EKG strips that never repeat.

An EKG strip, also called an ECG strip or rhythm strip, is a short recording of the heart’s electrical activity from one lead, usually lead II, printed on graph paper. A standard strip is 6 seconds long and is used to read the heart rate and rhythm.

Every strip is drawn by our own waveform engine from the published criteria for each rhythm, on standard paper. There are 492,000 different practice strips, 12,000 of each of 41 rhythms, so no two you meet are the same, and we can give the exact rate and intervals for each one.

Each rhythm is generated from its published textbook criteria. Before any change is released, a separate program that sees only the finished trace measures tens of thousands of strips and must arrive at the same rhythm, rate and intervals we report. If you think a strip is wrong, tell us and we will look at it.

Every day: three strips on this page (a warm-up, a measurement question and a hard one), five more on the practice page with each one measured and explained, and a 10-question sample practice test with a full report. A printable 20-strip practice test with its answer key, the 10-question EKG quiz and the whole rhythm library are free as well. None of it needs an account. Unlimited practice, full-length practice tests, the measurement trainer and your statistics are in the paid plans.

No. Both plans are a single payment for 30 days or one year of access. They do not renew automatically, and there is nothing to cancel.

Nothing. Both mean electrocardiogram. EKG comes from the German spelling and is the more common term in the United States; ECG is the English abbreviation. An EKG strip and an ECG strip are the same thing.

Normal sinus rhythm: evenly spaced beats at 60 to 100 a minute, one upright P wave in front of every QRS, a PR interval of 0.12 to 0.20 seconds (3 to 5 small squares) and a QRS narrower than 0.12 seconds (under 3 small squares). Every other rhythm is named for the way it departs from that picture, which is why it is the first strip to learn.

A standard practice rhythm strip is 6 seconds long. At the usual paper speed of 25 mm/s that is 30 large squares, which is why counting the QRS complexes and multiplying by 10 gives the heart rate.

Rhythm questions in nursing school and on the NCLEX, hospital dysrhythmia and telemetry competency exams such as the Relias Dysrhythmia tests, EKG technician certification, and the rhythm identification part of ACLS. You practise the rhythms those exams ask about, on strips that are new every time.

For study. It is built to get you through rhythm exams and to make the monitor familiar before your first shift. The strips are simulations, so a real patient’s EKG is read with your clinical training and your facility’s protocols, not with this site.