EKG Simulator Training Tool — Extended Edition

Clinical Realism

Workspace

Recording artifact

Artifact intensity 35%

12-lead teaching pattern

All 12-lead patterns are synthetic approximations for education, not diagnostic templates.

RhythmNormal Sinus

Rate72 bpm

Paper25 mm/s

Gain10 mm/mV

Heart Electrical Pathways Normal conduction and its relationship to the EKG waveform

Normal electrical sequence

Select a structure or an EKG phase to explore how the heart’s electrical activity produces the displayed tracing.

Heart activity and the EKG The EKG records voltage differences detected by electrodes; it does not show a direct picture of the heart.

Conduction comparison

Both bundle branches activate rapidly, supporting coordinated ventricular depolarization and a relatively narrow QRS complex.

Synchronized conduction cycle 72 bpm · normal sequence

SA node initiation 0 ms

Animation paused. Use Step, Replay, or drag the cycle control.

SA node initiatesThe normal impulse begins high in the right atrium.

Atria depolarizeThe impulse spreads across both atria, contributing to the P wave.

AV node delaysA brief delay supports ventricular filling and contributes to the PR interval.

His bundle conductsThe signal enters the specialized ventricular conduction system.

Bundle branches divideThe impulse travels toward the right and left ventricles.

Purkinje network spreadsRapid ventricular depolarization produces the QRS complex.

This is a simplified educational diagram. The EKG reflects the combined electrical vectors of many heart cells as viewed from each lead.

Educational references: American Heart Association · NCBI ECG overview · AHA conduction disorders

Electrode Placement Lab

Place the 10 electrodes

Select or drag an electrode, then choose its matching target. The torso is schematic; use the written landmarks during clinical training.

0 of 10 placed

Begin with V1 at the fourth intercostal space at the patient’s right sternal border, or select any electrode to practice freely.

LIVE SIMULATION

Lead II

10 mm/mV · 25 mm/s

00:00.0

Calipers off. Enable them to measure time or voltage directly on the strip.

Student Guide

Normal sinus rhythm

A normal sinus beat begins in the sinoatrial node. In this simulation, each P wave is followed by a narrow QRS complex and a T wave at a regular rate.

Use the labels and slow-motion option to connect each visible waveform with the underlying electrical event.

Waveform focus

Select P wave, QRS complex, or T wave below the trace to highlight its role.

R–R interval833 msPR interval160 msQRS duration88 msQT interval380 ms

1. Determine the rateMeasure the R–R interval or use a six-second strip estimate.

2. Check regularityCompare several R–R intervals rather than relying on one beat.

3. Inspect P wavesAsk whether P waves are present and consistently related to QRS complexes.

4. Measure intervalsUse the touch calipers to practice time and voltage measurements.

5. Form an interpretationCombine rate, regularity, atrial activity and QRS morphology.

Identify the simulated rhythm

Choose the best answer for the rhythm currently shown. You may change rhythms manually for practice or use Next Challenge.

Select an answer when ready.

Score0 / 0

Clinical realism workspace

Choose an artifact, open the synthetic 12-lead view, or practice placement of the ten electrodes used to obtain twelve electrical views.

Artifact checkArtifacts are signal distortions not produced by the heart’s electrical activity.

12-lead organizationLeads I, II, III, aVR, aVL and aVF view the frontal plane. V1–V6 are precordial views in the horizontal plane.

Inferior
II, III, aVFLateral
I, aVL, V5–V6Septal/anterior
V1–V4

Pattern recognition must be combined with patient history, symptoms, serial tracings and professional interpretation.

Fictional Case Training

These synthetic scenarios are for structured interpretation practice. They do not represent real patients or provide treatment guidance.

Choose a case and load it into the simulator.

Load a case to begin.

Educational simulation only. It does not analyze a real patient, provide a diagnosis, or replace professional medical evaluation.