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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

Dextrocardia with Coarctation

40 year old female, diagnosed with situs inversus, dextrocardia and coarctation of aorta while being worked up for hypertension. ECG shows right axis deviation, QRS positivity in aVR, lack of R wave progression in precordial leads and a negative P wave and QRS complex in lead I

Name: Anon
Sex: UN
Date: 08-12-2021 11:53
Recorded on: Biocare ECGS12A
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  • Low pass filter - 100 Hz
  • High pass filter - 0.5 Hz