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Unit 1
Biology
ECG
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ECG
stands for
Electrocardiogram.
The term
'Electrocardiogram'
is split into three parts:
'Electro'
,
'Cardio'
, and
'Gram'.
An
ECG
measures the
action potentials
of the heart.
ECG
stands for
Electrocardiogram.
ECG
stands for
Electrocardiogram.
Electrodes
are placed on different
areas
of the
body
and the
electrical impulses
are
detected.
These impulses are picked up by a
matching
and
amplified
device.
The term
'Electrocardiogram'
is split into three parts:
'Electro'
,
'Cardio'
, and
'Gram'.
An
ECG
measures the
action potentials
of the heart.
The
P wave
on an
ECG
trace is the time of the
atrial systole
(
contraction
).
Electrodes
are placed on different
areas
of the
body
and the
electrical impulses
are
detected.
The
QRS complex
on an
ECG trace
is the time of the
ventricular systole
(
contraction
).
These impulses are picked up by a
matching
and
amplified
device.
The
T wave
on an ECG trace is caused by the
depolarisation
of the
ventricles
during
diastole
(
relaxation
and
recovery
).
The
P wave
on an
ECG
trace is the time of the
atrial systole
(
contraction
).
If the heart is
diseased
, the
hearts normal conduction pathways
are
disrupted
, causing the
ECG trace
to appear
different.
The
QRS complex
on an
ECG trace
is the time of the
ventricular systole
(
contraction
).
A different number of beats per minute (
60-100
is normal) on an ECG trace indicates a
heart disease.
The
T wave
on an ECG trace is caused by the
depolarisation
of the
ventricles
during
diastole
(
relaxation
and
recovery
).
ECGs
can be used to diagnose
CHD.
If the heart is
diseased
, the
hearts normal conduction pathways
are
disrupted
, causing the
ECG trace
to appear
different.
A different number of beats per minute (
60-100
is normal) on an ECG trace indicates a
heart disease.
ECGs
can be used to diagnose CHD.