If you’re finishing an EKG technician program or already running 12-leads at work, the Certified EKG Technician (CET) credential from the National Healthcareer Association (NHA) is one of the most recognized ways to prove your skills to employers. The exam covers a lot of ground, from HIPAA and patient instructions to lead placement and rhythm strips, so it’s normal to feel unsure where to start.

The good news is that NHA publishes a test plan that spells out exactly what is scored. In this guide, we’ll walk you through the exam format, each of the three domains and its item count, the official resources worth downloading, and the questions candidates ask most often.

What Is the NHA CET Exam?

The CET exam is NHA’s certification exam for entry-level EKG technicians. It measures whether you can safely prepare patients, acquire a clean and complete tracing, recognize what’s on that tracing, and respond appropriately when something is wrong.

It isn’t only an interpretation test. Nearly half the scored items are about acquisition: machine settings, skin prep, electrode placement, artifact, and stress testing. Another third covers the patient care, safety, and compliance work that surrounds every EKG. Rhythm analysis matters, but it’s the smallest domain.

What Is the NHA CET Exam Format?

Here is the exam at a glance, based on the NHA CET Test Plan, the NHA Candidate Handbook, and the NHA EKG technician certification page:

  • Questions: 120 multiple-choice questions.
  • Scored vs. unscored: 100 scored questions plus 20 pretest questions. Pretest items don’t affect your score, and you won’t know which ones they are.
  • Time: 2 hours (120 minutes), or about one minute per question.
  • Delivery: At your school (if it’s an NHA-affiliated testing site), at a PSI testing center, or through live remote proctoring.
  • Scoring: Scaled scores range from 200 to 500, and you need a scaled score of 390 or higher to pass.
  • Results: If you test at your school, you’ll receive a preliminary score report immediately. If you test at PSI or through remote proctoring, NHA posts results to your account within 48 hours.
  • Scheduling: The exam is offered year-round.

Many questions include an EKG strip or a diagram of electrode positions. Plan to spend a little longer on those and move quickly through shorter recall items.

What Content Outline Does the NHA CET Exam Use?

The current exam is based on the NHA CET Test Plan published in 2017. It’s still the version NHA links from its CET page, so it’s the one to study from. The test plan divides the 100 scored items into three domains and 27 tasks, each paired with specific knowledge statements.

  • Domain 1, Safety, Compliance, and Coordinated Patient Care: 32 items (32%)
  • Domain 2, EKG Acquisition: 44 items (44%)
  • Domain 3, EKG Analysis and Interpretation: 24 items (24%)

NHA also lists three core knowledge areas that cut across every domain: basic heart anatomy and physiology, cardiac testing emergencies, and CPR and basic life support.

Domain 1: Safety, Compliance, and Coordinated Patient Care (32 items)

This domain covers everything you do for and with the patient besides placing electrodes. It tests whether you protect privacy, prevent infection, stay within your scope, communicate clearly, and recognize when a patient is in trouble.

  • Adhere to HIPAA regulations.
  • Follow infection control practices (for example, OSHA standards and standard precautions).
  • Work within your scope of practice and follow ethical standards such as the NHA Code of Ethics.
  • Communicate with patients and the multidisciplinary care team, adjusting for culture, language, age, and disability.
  • Obtain and interpret vital signs and know normal ranges across the lifespan.
  • Instruct patients on preparing for stress testing and on using ambulatory monitors such as Holter and event monitors.
  • Use the EMR/EHR to enter patient information and upload results.
  • Recognize signs and symptoms of cardiopulmonary compromise.

What questions look like: A patient asks you whether their EKG “looks normal,” or a Holter patient asks whether they can shower. You’ll need to pick the answer that is safe, accurate, and within an EKG technician’s role.

Domain 2: EKG Acquisition (44 items)

This is the largest domain, and it’s where hands-on experience pays off. It covers preparing the equipment and the patient, placing electrodes correctly for different tests, and producing a clean, complete tracing.

  • Maintain EKG equipment (load paper, replace clips, disinfect machines and leads).
  • Verify machine settings, including paper speed (standard 25 mm/sec) and gain (standard 10 mm/mV).
  • Prepare the skin and position the patient for 3-, 5-, and 12-lead tracings, stress tests, and telemetry.
  • Apply electrodes and attach leads for a standard 12-lead, ambulatory monitoring, stress testing, telemetry, and special situations such as right-sided or posterior EKGs, amputations, and pediatric patients.
  • Verify that all leads were recorded.
  • Identify and resolve artifact, including wandering baseline, somatic tremor, and AC (60-cycle) interference.
  • Mount a completed tracing for the chart.
  • Assist with monitoring and responding to complications during stress testing.

Study tip: Be able to place all ten 12-lead electrodes from memory. For example, V1 goes in the 4th intercostal space at the right sternal border, V4 in the 5th intercostal space at the midclavicular line, and V6 at the midaxillary line at the same level as V4. Also know how to tell artifact types apart by how they look on the strip.

Domain 3: EKG Analysis and Interpretation (24 items)

Here you work from the tracing itself. You won’t be asked to diagnose, but you do need to measure accurately, recognize major rhythms, and know which findings need immediate action.

  • Calculate heart rate from the tracing, and know the formulas for maximum and target heart rate.
  • Determine whether the rhythm is regular or irregular.
  • Measure the PR interval, QRS duration, and QT interval using graph paper units (one small box = 0.04 seconds, one large box = 0.20 seconds).
  • Inspect P waves, QRS complexes, ST segments, and T waves, including changes related to electrolyte abnormalities.
  • Identify sinus, atrial, junctional, and ventricular arrhythmias and heart blocks.
  • Recognize pacemaker spikes.
  • Identify signs of ischemia, injury, and infarction.
  • Take appropriate action when you see a life-threatening arrhythmia such as ventricular tachycardia or ventricular fibrillation.

What questions look like: You’ll see a strip and need to name the rhythm or calculate the rate. Use a consistent five-step approach every time: rate, regularity, P waves, PR interval, QRS width.

How Should You Use the NHA CET Blueprint to Build a Study Plan?

Because NHA publishes item counts, you can weight your study time to match. Domain 2 alone is worth 44 of the 100 scored points, so weak lead placement or artifact skills will cost you more than any single rhythm you can’t name.

  1. Download the test plan and turn each of the 27 tasks into a checklist item.
  2. Take a mixed baseline quiz before you start reviewing, so you know where you actually stand.
  3. Map every missed question to a task. Patterns show up fast, such as repeatedly confusing somatic tremor with AC interference.
  4. Prioritize heavily weighted weak spots, usually acquisition tasks, then patient care and safety.
  5. Practice strips daily in short sets so measuring intervals becomes automatic.
  6. Finish with timed, mixed practice so you can pace 120 questions in two hours.

What Official Resources Should You Use?

  • NHA CET Test Plan (2017): The official list of domains, item counts, tasks, and knowledge statements.
  • NHA Candidate Handbook: Eligibility, scheduling, ID rules, scoring, retakes, and renewal.
  • NHA CET certification page: Current eligibility pathways, testing options, and renewal requirements.
  • NHA study materials: NHA sells a CET study guide and online practice tests through its store.

Commonly used references include:

  • The Only EKG Book You’ll Ever Need (10th edition)
  • EKG/ECG Interpretation Made Easy
  • EKG Plain and Simple (4th edition)

Frequently Asked Questions About the NHA CET Exam

What score do I need to pass the NHA CET?
You need a scaled score of 390 or higher on a scale of 200 to 500. Scaled scoring keeps results fair across different versions of the exam, so the score isn’t a simple percentage correct.

How soon will I get my results?
If you test at your school, you’ll see a preliminary score report right away. If you test at a PSI center or through live remote proctoring, they post results to your NHA account within 48 hours.

What if I don’t pass?
You must wait 30 days between attempts and pay the full exam fee each time. You get three attempts. After a third unsuccessful attempt, you must wait one year before testing again.

How do I keep my CET active?
The credential renews every two years. You’ll complete 10 continuing education credits and pay the recertification fee.

Is the test plan enough to study from?
The test plan tells you what’s tested, not how to do it. Pair it with a good EKG textbook, your training program notes, and plenty of practice questions with strips.

Start Preparing for the NHA CET Exam With Pocket Prep

Pocket Prep’s NHA CET exam prep includes 650 practice questions, each with a detailed explanation, plus a full-length 120-question mock exam that mirrors the real test. Use the Weakest Subject quiz to focus on whichever domain is holding you back and Missed Questions to lock in what you’ve learned. With a consistent study plan, you can walk into test day confident and ready to pass.