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drag: orbit · pinch/wheel: zoom · tap heart: inspect
Heart by Macleod Labs
causal 4-D cardiac simulation · live 12-lead ECG · anatomy from real human imaging
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Not a medical device and not medical advice. Simulation outputs are illustrative, research-grade estimates.
📖 Textbook mode — labelled heart, body hidden

Surface coloring (simulated fields)

Anatomy layers

Body surface
Great vessels

Model layers

Auto-clear view (fade tissue in front of heart)
Wall motion (gain →)
ECG electrodes
Conduction system
Myofiber orientation
Electrical flow vectors
Mechanical flow vectors

Patch inspector

Tap the heart surface to pin a patch.

ECG → damage (inverse)

The reverse of reading an ECG: given only the 12-lead traces, find where on the heart the damage is. The traces on the paper are compared against 24 forward-simulated lesions; the best matches paint a likelihood map on the heart. Pick an ECG with the selector on the ECG paper (mystery cases are hidden lesions + noise), then hit ⚡ locate damage there — or run it from here.

Hemodynamics

Run

Scenario

Fidelity

Electrical: F1.5 reaction-eikonal + human AP templates. Motion: K0 prescribed kinematics from 0D circulation + local activation — not solved FE mechanics. ECG: equivalent-double-layer forward model, 10 electrodes → 12 leads. Anatomy: BodyParts3D body (MRI, CC-BY-SA) + Rodero CT physics mesh (CC-BY); registration RMS 2 mm. Everything displayed — fields, wall motion, ECG, damage effects — derives from the simulation.