❤️ ECG Simulator — 12-Lead Electrocardiogram

❤️ What It Demonstrates

This simulator generates synthetic 12-lead ECG traces by modelling the cardiac cycle as a sequence of Gaussian-shaped waveform components: the P wave (atrial depolarisation), QRS complex (ventricular depolarisation) and T wave (ventricular repolarisation). Each lead views the heart from a different electrical angle, producing the characteristic morphology used by clinicians to diagnose arrhythmias, ischaemia and conduction abnormalities.

How to Use

• Select a Rhythm Preset to see common patterns: normal sinus, tachycardia, bradycardia, atrial fibrillation (irregular RR), ventricular fibrillation (chaotic), ventricular tachycardia (wide QRS).
• Adjust Heart Rate to change the RR interval.
• Modify P, QRS, T amplitudes to simulate hypertrophy, conduction blocks, or electrolyte imbalances.
• Increase Noise to simulate real-world electrode artefacts.

Did You Know?

Willem Einthoven invented the string galvanometer in 1903 and recorded the first clinical ECG. He won the Nobel Prize in 1924. The standard 12-lead system uses only 10 electrodes placed on the limbs and chest — the remaining leads are mathematically derived. A single ECG costs just a few dollars yet remains one of the most powerful diagnostic tools in medicine, capable of revealing heart attacks, arrhythmias and even electrolyte disorders within seconds.