Electrogastrogram basics

An electrogastrogram (EGG) is a graphic produced by an electrogastrograph, which records the electrical signals that travel through the stomach muscles and control the muscles' contractions. An electrogastroenterogram (or gastroenterogram) is a similar procedure, which writes down electric signals not only from the stomach, but also from intestines.

1. ELECTROGASTROGRAM
Prepared by Atheena Pandian

2. It is a graphic produced by
an electrogastrograph, which
records the electrical signals
that travel through
the stomach muscles and
control the muscles'
contractions.
ELECTROGASTROGRAM (EGG)

4. An electrogastrogram and a gastroenterogram
are similar in principle to
an electrocardiogram (ECG) in that sensors on
the skin detect electrical signals indicative of
muscular activity within. Where the
electrocardiogram detects muscular activity in
various regions of the heart, the
electrogastrogram detects the wave-like
contractions of the stomach (peristalsis).
DESCRIPTION OF EGG

5. Motility of gastrointestinal tract (GI
tract) results from coordinated
contractions of smooth muscle, which
in turn derive from two basic
patterns of electrical activity across
the membranes of smooth muscle
cells—slow waves and action
potentials.
PROCESS OF EGG

6. Electrogastrogram -
Electrode placements

7. Electrogastrogram -
Electrode placements

8. Electrogastrogram

9. Waveforms of EGG

10. A bradygastria is defined, how decreased
rate of electrical activity in the stomach, as
less than 2 cycles per minute for at least 1
minute
A tachygastria is defined, how increased rate
of electrical activity in the stomach, as more
than 4 cycles per minute for at least 1 minute.

CONDITIONS OF EGG

11. stomach – about 3 waves in a minute
duodenum – about 12 waves in a
minute
jejunum – about 11 waves in a minute.
ileum – about 8 waves in a minute
rectum – about 17 waves in a minute
They set the maximum frequency at which
the muscle can contract
WAVES OF EGG

12. Electrical control activity
(ECA) and
Electrical response activity
(ERA)
The electrical activity of the GI
tract can be subdivided into
two categories:
1.
2.
CATAGORIES

13. RANGE OF EGG

14. Electrogastrography or gastroenterography used
when a patient is suspected of having a motility
disorder, which can be shown, as recurrent nausea
and vomiting, signs that the stomach is not
emptying food normally

The clinical use of electrogastrography has been
most widely evaluated in patients with
gastroparesis and functional dyspepsia.
CLINICAL APPLICATIONS

15. Good Luck