Interactive 3D cardiac conduction system with a live, time-synced 12-lead EKG (Three.js).
Created by Stevy, an internal medicine resident who likes EKGs and cardiology.
Pick classic findings (NSR, blocks, bundle branch block, AFib/flutter, VT, WPW, STEMI, and more). As the strip advances, matching pathways light up on the heart, and the cycle bar (P · PR · QRS · ST · T · TP) highlights the active ECG segment.
Live site: https://aznstevy.github.io/ekg-view/
This is an educational tool only. It is not medical advice, not a diagnostic device, and not a substitute for clinical judgment, formal ECG training, or patient care. Tracings are simplified teaching models and may not match real patient ECGs. The author assumes no liability for any decisions, outcomes, or damages arising from use of this tool.
- Orbit the 3D view (drag) · scroll to zoom
- Findings panel: select a rhythm / block pattern
- Rate: set ventricular rate (bpm)
- Vectors (
V): mean P/QRS/T vectors - Field (
F): myocardial vector field; AV fibrous plane is an insulator (His is the only bridge) - Leads (
L): RA/LA/LL/RL + V1–V6 electrode positions in space - Traveling white impulse moves down the conduction pathways with the cycle
- EKG scrub: drag or scroll the 12-lead to move in time (auto-pauses)
- Upload EKG: PNG/JPG strip → extracted tracing drives the heart
- Playback: play/pause, reset (
Space/R) - Heart: toggle translucent heart shell
- Hover pathways for labels