MI and ACS

Question 1

ECG changes in MI

Answer 1

ST elevation
T wave changes
Pathological Q waves
New BBB

Question 2

ST elevation definition

Answer 2

In 2 continguous leads
>/= 0.25 mV (2.5mm) M <40
>/= 0.2 mV (2mm) M >40
>/= 0.15 mV (1.5 mm) F V2-V3
>/= 0.1 mV (1 mm) in other leads

Question 3

ST elevation Normal variation

Answer 3

1 mm concave STE in lateral leads

Question 4

Pericarditis changes

Answer 4

Widespread saddle wave (concave ST elevation)

Question 5

Significance of ST depression

Answer 5

Exercise induced myocardial ischaemia
Subendocardial ischaemia
dynamic

Question 6

T wave inversion

Answer 6

Transient following ischaemia

Permenant following infarct

Question 7

Wellen’s syndrome

Answer 7

Deep T waves with symmetrical inversion in anterior leads

=critical proximal LAD narrowing

Question 8

Normal T wave inversion

Answer 8

III
V1
AVR

Question 9

Wide spread T wave inversion

Answer 9

Hypokalaemia
Cardiomyopathy
Myopericarditis
Post arrhytmia

Question 10

Q waves

Answer 10

Transmural infarction
>0.04s
> 1/4 the height of following R wave
Last change to occur

Question 11

Evolution of MI

Answer 11

Concave down STE
T wave inversion
Q wave

Question 12

V1- V2 =

Answer 12

Intraventricular septum

Question 13

V3-V5 =

Answer 13

Anterior Wall

Question 14

V6, I, aVL =

Answer 14

Posterolateral

Question 15

II, III, aVF =

Answer 15

Inferior

Question 16

Coronary artery to V1- V5

Answer 16

LAD

Question 17

Coronary artery to II, III, aVF

Answer 17

RCA, circumflex

Question 18

Significance of ST depression in V1 to V3

Answer 18

Posterior infarct possible

May also have prominent R waves

Question 19

Normal Variants STE

Answer 19

High take off in anterior leads can appear like MI