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P duration -
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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

Typical Atrial Flutter

Rapid atrial activity with variable AV block. The atrial cycle length is 280 ms without an isoelectric interval, with negative waves in inferior leads and a positive wave in V1. The morphology is consistent with a typical flutter due to clockwise activation around the tricuspid annulus.

Name: Anon
Sex: UN
Date: 18-11-2021 16:25
Recorded on: Biocare ECGS12A

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