Einthoven Lab

Einthoven Lab turns your iPad into a 12-lead ECG teaching bench: a live, twelve-lead tracing you can shape knob by knob, on paper that keeps its millimetres honest. WHAT IT IS Einthoven Lab is an educational ECG simulator. Every tracing is generated by a mathematical model of the heart's electrical activity. Nothing is recorded from a person: the app never connects to sensors, hardware or accessories, and no patient data is involved at any point. ONE DIPOLE, TWELVE VIEWS The engine represents cardiac electrical activity as a single vector turning in the chest. Each of the twelve leads is that same vector seen from its own angle, so the leads always agree with one another: Einthoven's law (II = I + III) and Goldberger's identity (aVR + aVL + aVF = 0) hold exactly, at every sample. Axis shifts, bundle-branch patterns, injury currents and their reciprocal changes all follow from the geometry instead of from per-lead scripting. TURN THE KNOBS - 12 rhythms: sinus, atrial fibrillation, atrial flutter with selectable conduction ratio, SVT, first-degree AV block, Mobitz I, Mobitz II, third-degree block, ventricular tachycardia, ventricular fibrillation, asystole and ventricular pacing - Ectopy: premature atrial beats, occasional or frequent PVCs and bigeminy, with the compensatory pause emerging from the model rather than being scripted - Morphology: frontal axis, RBBB and LBBB, QRS voltage and width, T-wave shape, QT scaling, U waves - ST segment: six injury territories with adjustable displacement; reciprocal changes appear on their own - Signal quality: baseline wander, muscle tremor and mains interference, applied to all leads at once 42 PRESET TRACINGS Five groups - sinus and atrial, ventricular, conduction blocks, ischaemia and ST, morphology and electrolytes - each preset carrying a short description of what to look for on the page. One tap returns to normal sinus rhythm. PAPER THAT BEHAVES LIKE PAPER - Three layouts: the classic 4x3 page, a roomier 6x2, and Stack, a 12-channel recorder page that shows every lead as a long strip - Two looks: Paper, the warm thermal sheet, or Monitor, the dark phosphor screen - 25 or 50 mm/s, per-layout gain, a 1 mV calibration pulse on every page, sweep or scroll pen - A full-width rhythm strip whose lead you choose READOUTS Heart rate measured from the beats themselves, a rhythm badge, PR, QRS, QT and QTc calipers, the QRS axis with its hexaxial classification, and a PVC-per-minute counter. A GUIDE INSIDE THE APP Built-in Help explains every control, the twelve leads, each preset and the model behind them - all offline. PRIVACY No account, no network, no analytics, no data collection. Einthoven Lab works entirely offline and nothing leaves your device. Einthoven Lab generates synthetic ECG waveforms for education. It is not a medical device, does not measure or record physiological signals, and must not be used for diagnosis or patient care. ON IPAD Landscape, full screen and touch-first, with the control and preset sidebars a tap away and the rhythm-strip lead picker in the toolbar menu.