MI

Question 1

High risk non-ST-Elevation myocardial infarction (non-STEMI) characteristics (3)

Answer 1

• ST depression > 0.5mm(0.05mV)
• Dynamic T-wave inversion with pain or discomfort
• Nonpersistant or transient ST elevation > 0.5mm (0.05mV) for longer than 20min.

Question 2

Normal or nondiagnostic changes in ST segment or T wave characteristics
(2)

Answer 2

• normal ECG

* ST deviation of

Question 3

II, III, aVf

Answer 3

Inferior Wall (most common)

Question 4

V1, V2

Answer 4

Septal Wall

Question 5

V3, V4

Answer 5

Anterior Wall (most lethal)

Question 6

I, aVL, V5, V6

Answer 6

Lateral Wall

Question 7

STEMI is characterized by what?

2

Answer 7

•Elevation > 1mm(0.1mV) in two or more limb leads or two contiguous
chest leads

•Also w/ new LBBB

Question 8

II, III, aVf

What artery involved?

Answer 8

Right

Question 9

V1, V2

What artery involved?

Answer 9

Left

Question 10

I, aVL, V5, V6

What Artery involved?

Answer 10

Left

Question 11

V4R-V6R

Answer 11

Right ventricle

Question 12

V4R-V6R

What artery involved?

Answer 12

Right

Question 13

What do deep symmetrically inverted T waves a sign of?

Answer 13

Ischemia

Question 14

In an acute STEMI reciprocal changes may be seen where?

Answer 14

Between leads that face acute injury

Leads that face lateral boundary of the injury(between ischemic and healthy tissue)

Question 15

Leads that face the injury often show what?

Answer 15

ST elevation

Question 16

Leads that face the boundary often show what?

Answer 16

ST depression

Question 17

How can the extent of infarction be gauged?

Answer 17

• How many leads show ST elevation

* Degree of elevation

Question 18

What are some “Infarct Imposters” that can cause ST changes

Answer 18

Left ventricular hyperthrophy
Ventricular rhythms
Pericarditis