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Defibrillation Electric Field Simulator

Interactive 3D simulator of the electric field a defibrillator shock drives through the thorax: place electrodes anterolateral or anteroposterior, set energy and transthoracic impedance, and see whether the field reaching the myocardium clears the defibrillation threshold.

Medicine & Biophysics3DModerate60 FPS📱 Mobile-adapted⇄ 2D version

When a defibrillator fires, it doesn't just "shock the heart" — it drives a current through the entire thoracic cavity, and only a fraction of that current actually crosses the myocardium at a strong enough gradient to depolarize it and interrupt fibrillation. This simulator models the chest as a homogeneous volume conductor and computes the real electric field from two point current sources (anode and cathode) using quasi-static bioelectric field theory, letting you compare anterolateral (sternum–apex) and anteroposterior (front–back) pad placement, dial in delivered energy and transthoracic impedance, and watch the resulting field vectors, peak current, and the field strength actually reaching the heart — checked against the ~5 V/cm clinical defibrillation threshold.

⚙ Under the hood

Model the electric field a defibrillator shock drives through the thorax: compare anterolateral and anteroposterior electrode placement, set energy and transthoracic impedance, and check whether the field reaching the myocardium clears the defibrillation threshold.

defibrillationelectric fieldcardiologybioelectricitymedical physicsbiophysics

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install