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For Engineers · Cardiac Action Potential

Cardiac Action Potential for a bioreactor

Built for engineers using it for real design work. Go from concept to a running model in the browser, then scale to the cloud when needed. Simulate a bioreactor live below — adjust the inputs and watch it respond, right in your browser.

Cardiac Action PotentialLive

the electrical heartbeat

Controls

Presets

Heart rate (bpm)

Plateau duration

Upstroke amplitude (mV)

Each heartbeat is an electrical wave: a fast sodium upstroke, a long calcium plateau unique to heart cells, then potassium repolarization. That plateau keeps the muscle contracted long enough to pump — and its length sets the refractory period. Educational tool, not medical advice.

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Data Inspector

Cycle length857 ms

Action-potential duration343 ms

Peak potential+20 mV

Governing equation

C_{m} \frac{d V}{d t} = - I_{i o n}, \frac{d V}{d t}_{ma x} = \frac{110 mV}{10 ms} = 11 mV/ms

Reading this result: The plateau holds the cell near 0 mV for ~343 ms — the calcium phase unique to heart muscle that keeps it contracted long enough to pump before potassium repolarizes it.

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Frequently asked questions

Is this good for engineers?: Yes — this version of "Cardiac Action Potential for a bioreactor" is framed for engineers using it for real design work. Go from concept to a running model in the browser, then scale to the cloud when needed.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.