ECG Workshop Flashcards
how many electrodes form a 12 lead ECG?
10
how many electrodes go on the chest?
6
where are V1 and 2 located on ECG?
4th intercostal space at each sternal border
what limbs are used for ecg?
RA
LA
RL
what is V3 used for in ECG?
V2-4
where is V4 placed in ECG?
5th intercostal space midclavicular line
leads are placed on the inner/outer aspect of the limb
inner
lead 1 measures
RA-LA
recording electrode for lead 1 is…
LA
lead 2 is..
right arm to left leg
recording electrode for lead 2 is…
left leg
lead 3 is..
LA to LL
recording electrode for lead 3 is…
LL
name the 6 chest leads
1, 2, 3
avL, avF, avR
name the anterior ECG leads
V3-4
name the septal ECG leads
V1-2
name the lateral ECG leads
1, avL, V5, V6
calibration of an ECG?
25mm/s
how many large boxes are there per second on an ECG?
5 boxes
a large box equates to how many seconds?
0.4s
what is the normal electrical axis of the heart
+90 to -30
the axis is normal if what axes are upright?
1 and avF
what will leads 1 and avF look like in left axis deviation?
1 positive
avF negative
what will leads 1 and avF look like in right axis deviation
1 negative
avF positive