MI Flashcards
Changes seen in <4 hrs?
None
Risk at <4 hrs?
Cardiogenic shock (massive infarction), CHF, and arrhythmia
Dark discoloration?
4-24 hrs
Coagulative necrosis (RBCs on histo)?
4-24 hrs
Risk at 4-24 hrs?
Arrhythmia
Neutrophil infiltration?
1-3 days
Macrophage infiltration?
4-7 days
Risk after 1-3 days?
Fibrinous pericarditis–chest pain w/ friction rub
Yellow pallor?
1-3 days, 4-7 days
Risk of rupture of ventricular free wall leading to tamponade?
4-7 days
Risk of IV septum rupture leading to shunt?
4-7 days
Risk of papillary muscle rupture?
4-7 days
Phase when wall is weakest?
Macrophage phase: 4-7 days
Gross has red border with granulation tissue?
1-3 weeks
Histo shows fibroblasts, collagen, and blood vessels?
1-3 weeks
White scar?
Months–scar
Risk of aneurysm?
Months
Risk of mural thrombus?
Months
Pericarditis appearing 6-8 weeks post-infarction?
Dressler’s
2 complications of fibrinolysis/angioplasty?
Contraction band necrosis, and reperfusion injury
Most sensitive/specific cardiac marker?
Troponin I
Useful marker for detecting reinfarction days after MI?
CK-MB
Anterior wall infarction?
V1-V4
Anteroseptal wall infarction?
V1-V2
Anterolateral wall infarction?
V4-V6
Lateral wall infarction?
I, aVL
Inferior wall infarction?
II, III, aVF
