MI Path

Question 1

1-3 days post MI, risk of what?

Answer 1

Arrhythmia

Pericarditis

Question 2

3-7 days post MI, risk of what?

Answer 2

free wall rupture (leads to cardiac tamponade, death)

papillary muscle rupture (leads to acute mitral regurgitation)

Question 3

10 days-2 weeks, risk of what?

Answer 3

Dressler syndrome (autoimmune)
Cardiogenic shock

Question 4

2+ months, risk of what?

Answer 4

aneurysms (lead to thrombus, stroke)

Question 5

<24 hrs post MI, macroscopic + microscopic

Answer 5

MACRO
-cut surface pallor

MICRO

• wavy fibers
• contraction band necrosis
• eosinophilia

Question 6

1-3 days post MI, macroscopic + microscopic

Answer 6

MACRO

• mottling
• tan infarct center
• hemorrhage

MICRO

• PMNs
• necrosis

Question 7

3-7 days post MI, macroscopic + microscopic

Answer 7

MACRO

• hyperemic border
• central pale yellow necrosis

MICRO

• pigment laden macrophages
• fibroblast proliferation
• collagen
• early granulation

Question 8

10 days- 2 weeks post MI, macroscopic + microscopic

Answer 8

MACRO
-gelatinous area

MICRO
-late granulation tissue

Question 9

2+ months post MI, macroscopic + microscopic

Answer 9

MACRO
-fibrotic, white

MICRO
-scar