Myocardial Infarction

Question 1

ST Segment Depression is associated with what type of injury?

Answer 1

Ischemia

Question 2

ST Segment Elevation is associated with what type of injury?

Answer 2

STEMI

Question 3

A wide QRS complex is associated with what type of injury?

Answer 3

Infarction

Question 4

What are three qualifications of a STEMI?

Answer 4

1) ST elevation of greater than 2 mm at J point in V2-V3 in Men
2) > 1.5 mm in woman (absence of LVH)
3) > in two or more contiguous chest or limb leads

Question 5

What is the difference between a 1) NSTEMI 2) NSTE ACS

Answer 5

1) NSTEMI: Chest pain, ST segment depression, T wave inversion, elevated cardiac enzymes
2) NSTE ACS (Non ST segment elevated Acute Coronary Syndrome): ST segment depression, T wave inversion, Chest pain. Normal cardiac enzymes.

Question 6

What general EKG feature is indicative of Ischemia ?

Answer 6

Inverted T waves, peaked T waves

Question 7

What is a characteristic change to tissues which has suffered an infarction?

Answer 7

Lacking depolarization

Question 8

What is a characteristic change to tissues which has suffered ischemia?

Answer 8

Impaired repolarization

Question 9

What are the leads and artery associated with an anterior wall infarction?

Answer 9

LAD; V1-V7

Question 10

What are the leads and artery associated with an inferior wall infarction?

Answer 10

RCA; II, III, AVF, V3-R –> V6R

Question 11

What are the leads and artery associated with a lateral wall infarction?

Answer 11

Circumflex A; I, AVL

Question 12

What are the leads and artery associated with a posterior wall infarction?

Answer 12

Posterior descending Artery; V1-V3

Question 13

Death or infarction of tissue causes what on EKG?

Answer 13

Q or Q/S waves

Question 14

What event is signified by the presence of a significant Q wave & persistent ST segment elevation?

Answer 14

Aneurysm development