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P duration -
PR interval -
QRS duration -
QT interval -



Apart from the standard 12 leads, additional leads are sometimes useful in the diagnosis of various conditions. These include right sided chest leads, posterior leads and elevated leads. Although ideally these should be recorded by placing electrodes in these locations, they can be derived from the standard leads. Here, right sided (V3R, V4R, V5R and V6R), posterior (V7, V8 and V9) and elevated leads (V1+1, V2+1, V1+2, V2+2) are derived and displayed. See here for more details.

Frontal loop
Sagittal loop
Vector leads
P wave
QRS complex
ST-T segment


39 year old male, known case of ARVC, with recurrent VT episodes, s/p ablation and AICD implant

Name: Anon
Sex: UN
Date: 12-01-2022 21:32
Recorded on: Biocare ECGS12A

  • Low pass filter - 100 Hz
  • High pass filter - 0.5 Hz
  • Notch filter - 50 Hz