ECG Ischaemia

Question 1

leads for an inferior MI?

Answer 1

II
III
aVF

Question 2

leads for a lateral MI?

Answer 2

I
aVL
V5
V6

Question 3

leads for an anterior MI?

Answer 3

V1, V2, V3, V4

Question 4

T wave changes in ischaemia?

Answer 4

tall tented T waves
biphasic
inverted
flattened

Question 5

ST segment changes in ischaemia?

Answer 5

flattening (rising to T wave)
deepening (below line)
widespread

Question 6

which T wave change marks Hx of an MI?

Answer 6

flattened T waves (can be serial changes across the ECG)

Question 7

criteria for thrombolysis?

Answer 7

ST elevation
>1mm in two contiguous limb leads
>2mm in two contiguous chest leads

Question 8

leads for a posterior MI? what change is seen?

Answer 8

V1, V2, V3

ST segment depression

Question 9

what are Q waves? what do they suggest?

Answer 9

dip in the line before the QRS

myocardial necrosis

Question 10

criteria for Q waves to be pathological?

Answer 10

in any of V1-V3

OR

> or = 0.03ms I, II, aVL, aVF, V4, V6

OR

two contiguous leads + >1mm in depth

Question 11

what do inverted T waves suggest?

Answer 11

ischaemia

Question 12

what does ST depression suggest?

Answer 12

ischaemia

Question 13

what arteries supply what areas?

Answer 13

anterior - LAD
lateral - circumflex
inferior - RCA

Question 14

what changes suggest a posterior MI?

Answer 14

ST depression V1, 2, 3

Question 15

criteria for LVH? correct term?

Answer 15

S V1 or V2
+
R V5 or V6

> 35mm
gives voltage criteria for LVH

Question 16

what MI would occur if the LCA was blocked?

Answer 16

anterolateral

Question 17

features of pericarditis ECG?

Answer 17

widespread ST elevation that dos not fit arterial categories

PR depression