ECG Basics Flashcards
Which leads look at the left lateral surface of the heart?
I, aVL, V5, and V6
What is the normal length of the QRS?
0.12s (3 small squares)
Which leads look at the intraventricular septum?
V3 and V4
Which artery generally supplies the inferior surface of the LV?
R coronary artery
How much times does a smal square represent?
0.04s
Which way does the AP travel across the wall of the heart?
Endo to epicardium
Which leads look at the inferior surface of the heart?
II, III and aVF
Which leads look at the RA?
aVR
Which leads look at the RV?
V1 and V2
What is a normal PR interval?
0.12 to 0.2s (3 to 5 small squares)
What are the PR interval represent in terms of cardiac physiology?
The time taken for impulse to travel from the SA node, through the atrium, AV, bundle of his and into ventricular muscle
II, III and aVF is which artery?
R coronary artery
Which leads look at the anterior and lateral wall of the LV?
V5 and V6
How much times does a large square represent?
0.2s