ST segment Flashcards
1
Q
how to measure ST
A
start of S to start of T
2
Q
what is ST
A
time from end of ventricular depolarisation to the start of ventricular repolarisation (usually isoelectric)
3
Q
abnormal ST
A
elevation >2mm (in two adjacent chest leads) elevation >1mm (in two adjacent limb leads = INFARCTION) depression = ischaemia (will be small at rest and larger during exercise)
4
Q
what is the T wave
A
ventricular repolarisation
5
Q
normal T wave
A
VR - inverted V1 - inverted (V2 - inverted in the young)
6
Q
abnormal t wave
A
if inverted in I, II, and v4-v6 this could be ischaemia or infarction
7
Q
digitalis / digoxin effect on T wave
A
causes T wave inversion and ST segment sloping depression
8
Q
A
digoxin effect on T wave
