15: Normal ECG Flashcards
1
Q
Rates for tachy and bradycardia
A
Tachycardia: 100+
Bradycardia: <60
2
Q
Limb leads and augmented limb leads
A
Limb leads: I, II, III
Augmented limb leads: AVR, AVL, AVF
3
Q
Which limb leads are perpendicular to which augmented limb leads?
A
Lead 1: AVF
Lead 2: AVL
Lead 3: AVR
4
Q
Changes in QRS complex interval can indicate what?
A
Necrosis/infarct
5
Q
How to interpret a QRS wave that doesn’t have typical peaks
A
- First deflection downward = Q wave
- First upright deflection = R wave
- Negative deflection following R wave = S wave
- Subsequent excursions above the line are labeled successively as R’, S’, etc
6
Q
Two conditions associated with inverted or tall upright T waves
A
Ischemia, hyperkalemia
7
Q
Changes in QT interval can indicate what?
A
MI, injury, infarct
