The Certified Rhythm Analysis Technician (CRAT) certification validates your proficiency in cardiac rhythm analysis and dysrhythmia recognition. Cardiac monitoring technicians working in telemetry units, intensive care units, step-down units, and cardiac departments rely on this credential to demonstrate clinical competence to employers and credentialing bodies. Our free CRAT practice test PDF lets you print exam-style ECG interpretation and rhythm analysis questions and work through them at your own pace — on paper, in your car, or anywhere away from a screen.
The CRAT exam demands mastery of the cardiac conduction system, the ability to identify and classify dozens of rhythm types from ECG strip characteristics, and knowledge of emergency response protocols for life-threatening dysrhythmias. The PDF covers every major rhythm category tested, including sinus rhythms, atrial dysrhythmias, junctional rhythms, AV blocks, ventricular dysrhythmias, and pacemaker rhythms — with the same question style you will encounter on the actual certification exam.
The CRAT certification exam tests your ability to identify, classify, and respond to cardiac rhythms across all major dysrhythmia categories.
You must know the electrical pathway of the heart: the sinoatrial (SA) node initiates the impulse, which travels through the atrioventricular (AV) node, the bundle of His, the right and left bundle branches, and finally the Purkinje fibers to depolarize the ventricles. Understanding this pathway explains why disruptions at each level produce distinct ECG changes.
Questions test your ability to identify the P wave (atrial depolarization), PR interval (0.12–0.20 seconds), QRS complex (less than 0.12 seconds), ST segment, and T wave (ventricular repolarization) — and to recognize when any of these deviate from normal values.
Sinus tachycardia (rate greater than 100), sinus bradycardia (rate less than 60), sinus arrhythmia (rate varies with breathing), sinus arrest (complete absence of P wave and QRS), and sinoatrial block are all tested with strip analysis questions.
Premature atrial contractions (PACs), atrial flutter (sawtooth P waves, 2:1 or 4:1 conduction ratio), and atrial fibrillation (absent P waves, irregularly irregular rhythm) — each with distinguishing rate, regularity, and P wave characteristics.
Junctional escape rhythm (rate 40–60, inverted or absent P waves) and accelerated junctional rhythm (rate 60–100) are distinguished by rate and P wave location relative to the QRS complex.
First-degree AV block (prolonged PR interval, all P waves conduct), second-degree type I/Wenckebach (progressively lengthening PR until a QRS is dropped), second-degree type II/Mobitz II (constant PR interval with intermittent non-conducted P waves), and third-degree/complete heart block (complete AV dissociation — P waves and QRS complexes march independently) must be distinguished precisely.
PVCs — including uniform vs. multiform, couplets, bigeminy, and trigeminy — along with idioventricular rhythm, ventricular tachycardia (rate greater than 100, wide QRS), and ventricular fibrillation (chaotic, no organized complexes) require rapid identification for emergency response questions.
Pacemaker spike identification, atrial vs. ventricular vs. dual-chamber pacing, failure to capture (spike present but no P/QRS follows), failure to sense (pacemaker fires when it should inhibit), and failure to pace (no spike when patient rate drops below set rate) are all high-yield CRAT topics.
Want immediate feedback on your rhythm interpretation skills? Our interactive CRAT practice test platform delivers instant answer explanations after every question, tracks your accuracy by dysrhythmia category, and lets you focus your remaining study time on the rhythm types where you make the most mistakes. Use the online tests alongside this PDF for a complete CRAT exam preparation strategy.
Try these questions from our free CRAT - Certified Rhythm Analysis Technician practice tests. The correct answer and an explanation follow each question.
A rhythm analysis technician is reviewing a 6-second strip that shows a regular rhythm with a heart rate of 50 bpm. P waves are not discernible, and the QRS complexes are narrow, measuring 0.08 seconds. Which rhythm should the technician identify?
Answer: B. Junctional Rhythm
This rhythm is identified as a Junctional Rhythm (or Junctional Escape Rhythm) because the heart rate is between 40-60 bpm, which is the intrinsic rate of the AV junction. The absence of P waves and the presence of a narrow QRS complex are classic indicators that the impulse is originating from the AV junction and traveling down the normal ventricular conduction pathway.
A Certified Rhythm Analysis Technician is reviewing an ECG strip and notes that the only abnormality is a heart rate of 48 beats per minute. All other parameters (P wave, PR interval, QRS complex, and regularity) are within normal limits. Which rhythm is most likely present?
Answer: B. Sinus Bradycardia
Sinus Bradycardia is characterized by a sinus rhythm with a rate of less than 60 beats per minute. Since all other aspects of the rhythm are normal, this is the correct interpretation.
A technician is analyzing a rhythm strip and notes a run of three or more consecutive wide-complex beats at a rate of 140 bpm. The rhythm is regular. This finding is best classified as:
Answer: B. Ventricular Tachycardia (VT)
Ventricular Tachycardia (VT) is defined as a rhythm with three or more consecutive beats of ventricular origin at a rate greater than 100 bpm. AIVR has a rate of 41-100 bpm, and while SVT with aberrancy has a wide QRS, the description points directly to the definition of VT.
A technician observes a rhythm strip where the underlying sinus rhythm is interrupted by a single beat that occurs earlier than expected. This premature beat has a P wave with a different morphology from the sinus P waves, followed by a normal QRS complex. What is this single beat called?
Answer: D. Premature Atrial Contraction (PAC)
A Premature Atrial Contraction (PAC) is an ectopic beat originating from the atria, causing it to occur early. [5, 13] Its key features are a premature P wave with an abnormal shape compared to sinus P waves, followed by a typically normal QRS complex. [5, 24] A PJC originates in the AV junction and usually has an inverted or absent P wave. A PVC originates in the ventricles and has a wide, bizarre QRS. Atrial Bigeminy refers to a pattern where every other beat is a PAC, not the single beat itself. [5]
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