ECG Rhythm Strips on the NREMT Paramedic Exam: The Four Questions That Decide the Action

How rhythm strips appear on the NREMT Paramedic exam

The July 2024 specification for the National Registry Paramedic Certification Examination lists ECG rhythm strips among its graphical items, next to charts, images and pictures. A graphic can sit inside any item type, including multiple-response and scenario items, and every item is scored all or nothing, with no credit for a partially correct response.

How many strip items to expect is an open question in the official documents. An earlier version of the Paramedic test plan, created in January 2024 and still opened by the handbook's sample-items link, carries a note under its domain table: 30% of the Cardiology & Resuscitation domain is allotted to graphical items with ECG rhythm strips. The July 2024 specification, linked from the National Registry's AEMT and Paramedic exam page, has no such note. The National Registry pages checked do not say which statement applies now. Either way, plan for strips to appear, without counting on a fixed share.

Rhythm decisions are paramedic work. In the National EMS Scope of Practice Model 2019, manual defibrillation, electrical cardioversion, transcutaneous pacing and 12-lead interpretation are paramedic-level skills, so a Paramedic item can ask you to act on your own reading. These are the Paramedic test plan's expectations; the EMT exam uses a different blueprint.

On Passy, rhythms are described in words. Learn to read real strips with your program and instructor, and use the questions below to turn a reading into an action. Your protocols and medical director decide real care.

The four questions, mapped to the 2025 adult guideline

The 2025 AHA adult advanced life support guideline sorts tachycardia treatment by four features. Ask them in this order:

1. Stable or unstable? The guideline's term is "hemodynamically unstable." Read the stem's blood pressure, mental status and perfusion findings before you look at the strip. When a tachyarrhythmia with a pulse is causing the instability, synchronized cardioversion is generally indicated; sustained polymorphic VT instead requires an unsynchronized shock. Sinus tachycardia from another illness calls for treatment of its cause.
2. Narrow or wide? For a stable, regular narrow-complex tachycardia, vagal maneuvers are recommended.
3. Regular or irregular? An irregularly irregular wide-complex tachycardia is one of the patterns where adenosine should not be given.
4. One shape or changing shapes? Monomorphic complexes all look alike; polymorphic complexes change shape and size. Adenosine should not be given for polymorphic wide-complex tachycardia, and sustained polymorphic VT in an adult gets immediate defibrillation (COR 1).

The starting-energy recommendations in that row are specific to AF and flutter; they do not define the energy for every tachycardia. Energy settings in practice follow your device and protocol.

Synchronized cardioversion or defibrillation: match the shock to the rhythm

Many rhythm items come down to choosing the shock. The 2025 adult guideline pairs them this way:

The polymorphic VT line is the 2025 addition: the AHA now recommends immediate defibrillation for every adult with sustained polymorphic VT. The guideline makes no exception for stability here: all adults with sustained polymorphic VT receive immediate defibrillation. How your monitor's sync mode behaves is part of your device training; the exam decision is which shock the rhythm calls for.

The free set includes a Clinical Judgment item built on that choice, with a sustained polymorphic rhythm in an adult who becomes unresponsive. When the pairing above feels automatic, review the polymorphic VT item in 20 mixed NREMT Paramedic questions →.

A stable wide-complex tachycardia, worked in words

The patient is fictional. A 61-year-old woman has had palpitations for an hour. She is alert and talking, her skin is warm and dry, and her blood pressure is in her usual range. The monitor shows a fast rhythm with wide complexes that all look the same and arrive at regular intervals.

• Stable? Yes, as described.
• Narrow or wide? Wide.
• Regular? Yes.
• One shape? Yes, monomorphic.

That combination is the one row where the 2025 guideline says IV adenosine may be considered, either to treat the rhythm or to help identify it when its cause cannot be determined.

Now change one fact at a time. If she becomes confused with a falling blood pressure, she has a hemodynamically unstable wide-complex tachycardia: synchronized cardioversion is recommended, and adenosine should not be given. If the complexes start changing shape and size and she stops responding, the rhythm is sustained polymorphic VT, and the answer is immediate defibrillation. The strip changed less than the decision did, which is why the stem's patient details matter as much as the rhythm.

The narrow-complex side works the same way. The free set's rhythm item pairs a fast, regular, narrow-complex rhythm with signs of poor perfusion, so check the unstable narrow-complex tachycardia item in the free NREMT Paramedic set → after you have worked the four questions on it.

Bradycardia: reversible causes, atropine, then pacing or an infusion

For adults with acute symptomatic bradycardia, the 2025 guideline sets out three steps:

1. Look for the cause. Evaluating and treating reversible causes is recommended (COR 1).
2. Atropine. With hemodynamic compromise, atropine is reasonable to raise the heart rate (2a).
3. If atropine does not work. IV adrenergic agonists with rate-raising effects, such as epinephrine or dopamine, or transcutaneous pacing may be effective while the patient is prepared for transvenous pacing if needed.

Transcutaneous pacing is a paramedic-level skill in the Scope of Practice Model. Drug amounts for atropine, adenosine and the infusions are not given here; they come from your protocols and medical director.

Put the strip into words before you choose

Before you read the options, say the rhythm to yourself in the guideline's vocabulary: fast or slow, narrow or wide, regular or irregular, one shape or changing shapes. Then add the patient: stable or unstable, pulse or no pulse. With those six words, most of the rows above select themselves. The measurements behind each word, such as how wide counts as wide, come from your program's strip-reading method and your instructor.

For arrest rhythms in sequence, see the cardiac arrest guide. For 12-lead reading and STEMI decisions, see the 12-lead ECG guide. The question types guide explains how graphical items combine with the other formats.