303 Cardiology (not finished) Flashcards
1
Q
How long is a normal PR interval?
A
0.12 sec - 0.20 sec (3-5 small squares)
2
Q
How long is a normal QRS complex?
A
<0.12 sec (3 small squares)
3
Q
What are the signs of ischaemia on an ECG?
A
Q waves
ST depression / elevation
T wave inversion
4
Q
What are Q waves?
A
an initially negative deflection of the QRS complex
if the wave immediately after the P wave is an upward deflection, it is an R wave; if it is a downward deflection, it is a Q wave
