New • Interactive learning
Enter the Virtual EP Lab
Work through a synthetic SVT induction case. Compare signals, measure intervals, and explain your reasoning one step at a time.
Start the stimulation case →Interactive EP Practice Lab
Practice thinking like an EP technologist.
Synthetic cases that reinforce structured observation, signal interpretation, mapping logic, device concepts, troubleshooting, and responsible technology use.
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Case library
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ECG
Narrow-Complex Tachycardia: Start With Description
Practice describing a regular narrow-complex tachycardia before jumping to mechanism.
Open case →EGM
Identify A, H, and V
Use timing and channel context to identify components on a simplified His-region tracing.
Open case →EGM
Coronary Sinus Activation Sequence
Interpret an illustrative distal-to-proximal atrial activation pattern without overcalling mechanism.
Open case →Mapping
All Catheters Shift Together
A map suddenly shifts while independent position information appears unchanged.
Open case →Mapping
The Earliest Point Is Noisy
A focal activation map highlights an 'earliest' point with poor electrogram quality.
Open case →Devices
Pacing Artifact Without QRS
A pacing artifact is visible, but the expected ventricular response is not obvious.
Open case →Devices
Device Detects Events Not Seen on Surface Rhythm
Stored device events appear rapid, but the surface rhythm does not match.
Open case →Workflow
One EGM Channel Suddenly Becomes Noisy
Practice localizing a recording problem before troubleshooting.
Open case →Workflow
Automatic Annotation Changes Component
An annotation algorithm begins selecting a different electrogram component after a morphology change.
Open case →Arrhythmia
AVNRT vs AVRT: Avoid the Shortcut
A regular SVT has concentric atrial activation and short VA timing.
Open case →Pacing
Stimulus → Response Reasoning
Programmed stimulation is delivered and one premature stimulus does not depolarize the intended tissue.
Open case →AI
AI Flags an Arrhythmia
An AI-enabled tool flags a rhythm as likely atrial fibrillation, but the tracing quality is poor.
Open case →How to use the Practice Lab
1. Describe the observable data. 2. Decide what the clue supports or does not support. 3. Choose the safest next reasoning step. 4. Read the feedback even when you answer correctly.