SimulatingConnecting…

  • No added layers — rhythm only
Rate

Connecting…0.0 s
HRrecent RR—/min

Configured
  • Connecting…
Esc or F to exit full screen

12 leads: swipe horizontally to see the other leads. Turn Measure off before swiping; use sample times to measure without dragging.

Save

Waiting for live samples…

On video & PNG

Engine model values, labelled simulated. Hidden in presentation mode.

View

Presentation hides rhythm, settings, drugs and event labels while keeping the same trace and SIMULATED label.

Start here
  1. Choose a rhythm, then adjust its driving rate. Added layers and noise may carry over.
  2. Use Intervals to inspect model values, or Measure to pause and measure two points. Hide answers removes labels and the displayed heart rate for practice.
  3. Use Save for a PNG or original samples, or Record for a video.

New to ECG? Start with ECG Basics, or practise in Learn. Browser Back and Forward change the rhythm in the same running session; they do not rewind the trace or restore every setting. The URL retains the rhythm when answers are hidden.

Starting the continuous monitor…

Rotate the phone for a longer trace (about 7 s at 25 mm/s).

Variant
Representative
Compare variants

Model variants of the same rhythm, not severity levels. Variant and natural variation carry over to the next rhythm.

Timing & breathing variation; pacing stays fixed. 0% removes background variation.

Noise

Slow drift, as from breathing (about one cycle every 4–5 s).Noise carries over to the next rhythm and is never part of the measured intervals.
Beta support & limits

Tested in desktop Chrome. Mobile Safari has not yet been verified.

Shortcuts outside inputs, menus and video: R record · C capture · F full screen. Space pauses on the page; focused buttons keep their normal action.