MPAS 508 Intro to ECG
1. A graphical resents atrial depo- larization
record- ing of -Initiated by the SA node
the electrical -Causes atria to squeeze
currents that
move through
the heart during
a cardiac cy- cle
- A 10 second
pic- ture of
what the heart
is doing elec-
trically
- Moves across
the page at
25mm/sec
2. What are a
few forms
that ECGs can
come in?
3. What is the
conduction
system through
the heart?
4. First wave
deflec- tion in
the car- diac
cycle and rep-
1/
39
, MPAS 508 Intro to ECG
Electrocardiogram (ECG) nje fibers P
wave
-12-lead ECG
-Single-lead rhythm strip
(typically 6 seconds long)
-SA node
-AV node
-AV bundle (Bundle of His)
-Bundle branches
-
P
u
r
k
i
2/
39
, MPAS 508 Intro to ECG
5. What is the squeeze
normal height -Atrial repolariza- tion also occurs at this
and length of time
the P wave?
6. Which leads is
the P wave
upright in?
7. What are
some P wave
variations?
8. Portion of an
ECG that
includes the
time it takes an
electric signal
to travel from
the SA node to
the AV node
-Delayed
9. Portion of an
ECG caused by
ventric- ular
depolarization
that begins at
the apex
-Ventricles
3/
39
, MPAS 508 Intro to ECG
-Less than or equal to 2 ½ mm -Biphasic (can be seen in lead
tall
-Less than or equal to 0.12 s V1) PR Segment
-Upright: I, II, aVF, and V3-6
-Inverted in aVR
-Variable in other leads
-Tall, peaked: hyperkalemia,
sinus tachycardia
-Notched QRS Complex
-Wide, notched
10. Q
4/
39
1. A graphical resents atrial depo- larization
record- ing of -Initiated by the SA node
the electrical -Causes atria to squeeze
currents that
move through
the heart during
a cardiac cy- cle
- A 10 second
pic- ture of
what the heart
is doing elec-
trically
- Moves across
the page at
25mm/sec
2. What are a
few forms
that ECGs can
come in?
3. What is the
conduction
system through
the heart?
4. First wave
deflec- tion in
the car- diac
cycle and rep-
1/
39
, MPAS 508 Intro to ECG
Electrocardiogram (ECG) nje fibers P
wave
-12-lead ECG
-Single-lead rhythm strip
(typically 6 seconds long)
-SA node
-AV node
-AV bundle (Bundle of His)
-Bundle branches
-
P
u
r
k
i
2/
39
, MPAS 508 Intro to ECG
5. What is the squeeze
normal height -Atrial repolariza- tion also occurs at this
and length of time
the P wave?
6. Which leads is
the P wave
upright in?
7. What are
some P wave
variations?
8. Portion of an
ECG that
includes the
time it takes an
electric signal
to travel from
the SA node to
the AV node
-Delayed
9. Portion of an
ECG caused by
ventric- ular
depolarization
that begins at
the apex
-Ventricles
3/
39
, MPAS 508 Intro to ECG
-Less than or equal to 2 ½ mm -Biphasic (can be seen in lead
tall
-Less than or equal to 0.12 s V1) PR Segment
-Upright: I, II, aVF, and V3-6
-Inverted in aVR
-Variable in other leads
-Tall, peaked: hyperkalemia,
sinus tachycardia
-Notched QRS Complex
-Wide, notched
10. Q
4/
39
