| Welcome
to this series of tutorials concerning ecg 's reading
Basics definitions:
ECG:
- an electrocardiogram is a recordering of
the heart 's electrical activity
- it is generally recorded
on a graph paper
ELECTROCARDIOGRAPH:
- it is
the machine that records the electrocardiogram
THE FIRST ELECTROCARDIOGRAM:
-
was recorded in 1895 by Whilem Einthoven, a Dutch physiologist
-
Whilem Einthoven received the Noble Price in Physiologie and Medicine
in 1924 for his works on ECG
- the ECG was then improved by Wilson
(1938) and Emmanuel Goldberger (1942) who determined the ecg as
it is used today
ELECTRODES AND LEADS
- during
its activity, the heart produces an electric field
- the ECG
records this electric field and its variations
- an Electric
Field is always recorded between 2 electrodes
- the ECG uses
2 kinds of electrodes:
-
bipolar electrodes: a classical pair of electrodes
-
unipolar electrodes: only one electrode is present, the second is
a neutral electrode
that doesn't appear
- a pair of electrodes that records the electrical
activity of the heart with a determined polarised direction is called
a lead. A lead is represented by a vector.
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