reading an ECG Flashcards
1
Q
systematic approach
A
confirm detailes heart rate rhythm axis p waves PR interval QRS complex ST segment T waves
2
Q
confirming details
A
name and dob
date and time of ECG
calibration - usually 25mm/s and 10mm/1mV
3
Q
calculating heart rate
A
300÷big squares in R-R interval
no. QRS in 30 big squares X 10
4
Q
normal cardiac axis
A
II has most + deflection that I and III
5
Q
right axis deviation
A
III is most +
I is -
6
Q
left axis deviation
A
I most +
II and III -
7
Q
looking at P waves
A
present?
is each followed by QRS?
8
Q
PR interval
A
0.12-0.2s (3-5 small squares)
9
Q
looking at QRS
A
width
height
morphlogy
10
Q
width of QRS
A
narrow < 0.12s
broad > 0.12s
11
Q
tall QRS
A
ventricular hypertrophy
12
Q
looking at T waves
A
tall
inverted
13
Q
tall T waves
A
> 5mm limb leads and >10mm chest leads
hyperkalaemia
